AmiBroker Release Notes

AmiBroker Change Log

CHANGES FOR VERSION 6.92.0 (as compared to 6.91.0)

Symbol list and category tree now use Dark Mode when it is selected in the Customize/Appearance dialog
Layout treeview now uses Dark Mode when it is selected in the Customize/Appearance dialog
Charts (formula) treeview now uses Dark Mode when it is selected in the Customize/Appearance dialog
Layers list now uses Dark Mode when it is selected in the Customize/Appearance dialog
Added 'Warning 904' when SetOpacity is called without proper settings ("Multithreaded charts" and "QuickGFX" must be turned on in the Preferences)
Notepad window uses Dark Mode when it is selected in the Customize/Appearance dialog
Interpretation window now uses Dark Mode when it is selected in the Customize/Appearance dialog
Symbol Information window now uses Dark Mode when it is selected in the Customize/Appearance dialog

CHANGES FOR VERSION 6.91.0 (as compared to 6.90.6)

AFL: AddColumn supports 2 new formats: formatDateOnly and formatTimeOnly to display DateTime() values
AFL: SetOpacity( opacity = 1 ); to change opacity level (0..1) for subsequent Plot() calls. Opacity = 1 means totally opaque, 0.5 - half-transparent (translucent) 0 - completely transparent (invisible)
QuickGFX: Improved rendering of line plots with width>1 to better align with GDI output
QuickGFX: Opacity / Alpha blending implemented for styleBar plots
QuickGFX: Opacity / Alpha blending implemented for styleCandle plots
QuickGFX: Opacity / Alpha blending implemented for styleDashed plots
QuickGFX: Opacity / Alpha blending implemented for styleDots plots
QuickGFX: Opacity / Alpha blending implemented for styleLine plots
QuickGFX: Opacity / Alpha blending implemented for styleStaircase plots
QuickGFX: Opactity / Alpha blending implemented for styleArea plots
QuickGFX: Opactity / Alpha blending implemented for styleHistogram plots
UI: Column widths in Plugins window scale to DPI
UI: Parameter dialog now keeps the collapsed state of sections, individually on per-chartID basis (for as long as AmiBroker is running)
IB plugin supplied with setup reverted to version 2.11

CHANGES FOR VERSION 6.90.6 (as compared to 6.90.5)

HtmlView (report viewer) now calculates its initial size from screen DPI so it gets larger on hidpi screens automatically
HtmlView (report viewer) remembers its last window size now
HtmlView (report viewer) has "HiDPI aware" flag set in the manifest, that prevents Windows for blurring window
AFL Reference now uses internal viewer that is able to redirect to online version of the guide if help on particular topic is missing from off-line (CHM) version
Changed timestamp formatting in results.rlst back to previously used scheme with '-' and ';' separators

CHANGES FOR VERSION 6.90.5 (as compared to 6.90.1)

AFL: new field Status("seqstep") for reporting current sequence step (1-based), returns 0 if action is NOT run as part of sequence
NewAnalysis: "auto size to fit content" makes columns 10% wider than before because MS ListView "autosizing" calculation does not account for any margin
NewAnalysis: default width of columns is now scaled by screen DPI so they are not too narrow on HighDPI screens
Text tool now has new "Use pixel co-ordinates" mode that allows to fix position of text to pixel coordinates so it stays in place when you move the chart
Maximum number of parameters per section increased to 1000
Commentary editor (richedit based, not scintilla) displays multi-line calltips now (maxtipswidth called and long static buffer used)
Added Help->Activate License dialog to provide better user experience than given by MS SmartScreen :-(

CHANGES FOR VERSION 6.90.1 (as compared to 6.90.0)

Registry key changed back to previously used HKCU\Software\TJP\Broker
Report Explorer command line handling fixed

CHANGES FOR VERSION 6.90.0 (as compared to 6.49.1)

AFL Editor: now extended function description is displayed in parameter tooltips for all AFL functions
AFL: All Gui* control functions added extra 'style' parameter
AFL: renamed Map() to MapCreate() to avoid conflicts with existing code using 'map' word as variable identifier, and added alias MxCreate to Matrix for consistency
AFL: SetOption - added yet another protection against passing absurd values in AFL for AccountMargin (outside 1..100)
AFL: SparseInterpolate function added to interpolate values between sparse points given as input
AmiQuote - when UserDataSources.xml config file is not found in the current working directory, change CWD to the directory where Quote.exe is located
Charts: an error is displayed when user has zoomed in / scrolled into blank (no quote) area so there are no data to display
Charts: Removed data access from non-GUI thread in DrawStockCustom()
Charts: when pressing "END" key blank bars are only added upto the point where at least 1 data point is visible on chart
Filter dialog: added a "Clear All" button to Clear BOTH Include and Exclude pages in one click
New Analysis: Exploration: Removed limit of column text length in AddTextColumn
New Analysis: Filter dialog would show categories that were assigned BLANK names (or no name at all as) "<Category with empty name>" to make sure that users don't assume that selecting empty name is the same as pressing clear button. It isn't
NewAnalysis: changed notice when "Apply to" filtering was too strict so no symbol matched to instruct user to switch to "All symbols" or change the filter
NewAnalysis: Individual optimization crashed when GenerateReports was turned on. Fixed.
NewAnalysis: Removed data access from non-GUI thread in SetupParser in GetNumberOfQuotations
NewAnalysis: sharing violation could occur on attempt to write shared results.rlst file when doing Individual optimization with GenerateReports. Fixed.
NewAnalysis: since AmiBroker in individual optimization mode is fast enough to produce dozens of reports in single millisecond a timestamp for report folder needed to use more resolution than 1ms. Fixed using unique counter. Now folder has YYYYMMDD_HHMMSS
NewAnalysis: when user turned on 'Pad and Align" but reference symbol does not exist in current database, an Error 76 is displayed.
Regression in 6.49.1 - formulas with lots of AddToComposites could run slower, now changed idle processing so queue is emptied faster
ReportExplorer: file re-reads/refreshes are 10x faster now
ReportExplorer: in case of file sharing violation due to intermittient update of file by the other process, the message is quietly displayed in the status bar instead of modal blocking dialog box
ReportExplorer: now uses hyper-fast list view implementation borrowed from AmiBroker. Results in 20x display performance improvement
UI: Changed the way how "Start page" is displayed in the absence of other MDI windows to prevent opening more than one on loading layout
UI: Filter dialog now provides instructions to press Clear to start over if filtering resulted in no symbols meeting selected criteria
UI: Fixed crash when user attempted to make "Start page" floating
UI: regression Log window did not show runtime errors from charts in 6.49.1. Fixed
UI: Symbol bar, a context menu key on the keyboard (VK_APPS) brings up context menu (in addition to right click)
UI: Symbol/Category view and Category dialog do not allow to set category names to empty (blank) - it will revert to default name if user attempted to remove name completely
When weekly time compression was used, "MonthlyWeeklyUseAlwaysLastTradingDay" mode was used, Monday was not a trading day, and only Tuesday was present, then weekly bar had Monday timestamp instead of Tuesday. Fixed.

CHANGES FOR VERSION 6.49.1 (as compared to 6.49.0)

AFL: formatDateTimeISO was working as formatDateISON (no separators). Fixed so now it includes separators.
AFL: new function trunc() that truncates fractional part, works identically as int(). int() is now marked as obsolete and will be removed in some future. All instances of int() should be replaced by trunc() in new code.
AFL: in 6.49.0 int() function wasn't doing anything (no-op), regression fixed.
UI: in 6.49.0 the interpretation window crashed, regression fixed.

CHANGES FOR VERSION 6.49.0 (as compared to 6.43.0)

Account: Summary page (grid) in dark mode displays read-only items in lighter shade of gray for better readability
AFL Editor: Added simple detector of pasting ChatGPT-generated code. Displays a notice that ChatGPT is not able in most cases to produce valid code. Due to stochastic nature of how ChatGPT produces code it might not detect all cases.
AFL Editor: Fold margin width now scales with font selected / DPI instead of being fixed
AFL Editor: UI, in auto-complete dropdown "Fals" was displayed instead of "False". Typo fixed.
AFL Editor: watch window displays arrays with less than 5 elements entirely without ... (elipssis)
AFL Editor: when symbol has no quotes, the AFL editor will now create synthetic data to allow verify syntax and debugging anyway. Artificial data created is just 1 bar (future), it allows code checking in this edge case
AFL: added support for C++ -style raw strings
AFL: AddToComposite requests are now served by idle message queue (gives slight speed up and allows syncing with post process normalization)
AFL: atcFlagNormalize performs normalization by dividing OHLCV fields by the field given as argument (either "I", "1" or "2") after scan is completed

AddToComposite(C, "~MY_COMPOSITE", "C"); AddToComposite(1, "~MY_COMPOSITE", "I", atcFlagNormalize | afcFlagsDefaults ); // only use atcNormalize in the "counter"
AFL: Crash could occur if type of second or subsequent argument for function call was invalid, due to uninitialized memory. Fixed.
AFL: experimental - added support for maps (dictionaries of key-value pairs, aka associative arrays), note that all map variables (unlike other types) are really references, so when you pass it to a function you are passing reference and original object i
AFL: Matrix( rows, cols, init_val = Null, increment = 0 ) has now new parameter 'increment' that allows to create a matrix with monotonically increasing elements

Example:
m = Matrix( 1, 10, 0, 0.25 ); printf("%s", MxToString( m ) );

would produce { { 0, 0.25, 0.5, 0.75, 1, 1.25, 1.5, 1.75, 2, 2.25 } }
AFL: micro-allocator block size bumped to 64 bytes in both 32bit and 64bit versions for better alignment with cache line size and better performance
AFL: new Error 74 - AmiBroker now reports invalid non-ASCII characters being used in the formula code. Non-ASCII codes (>127) are only allowed in strings and comments.
AFL: Nz() function now accepts scalars and arrays in ValueIfNull argument (previously only scalar was accepted)
AFL: SafeDivide - added support for 3rd argument (resultIfZeroDiv) to be array in case when 1st and 2nd args are arrays
AFL: Static variable declaration now allows custom initial value. The initial value expression is evaluated and assigned to static variable only if static variable wasn't present before. If initial value is not given, declared static variable is automatically initialized as scalar value of zero (0)

#pragma enable_static_decl(prefix)
static _a = 0, _b = 0, _c = 0; // explicit initial values

static _x; // this would automatically be intialized as number equal zero (default) static _my_str_var = ""; // this would be initialized as empty string static _y = 1; // this would be initialized as numeric value of 1 static _z = ( High + Low )/2; // this would be initialized with (H+L)/2;

function MyInitFunction() { printf("NOTE THAT THIS INTIAILIZER function is called only when static variable does NOT exist already"); return 2; }

static _w = MyInitFunction(); // the init will be called just once, if and only if static variable _w does not exist yet

Static variables declared without initial values are not written to static var memory unless they are assigned any value later in the code.
This is to conserve memory in case when someone declared variable but did not use at all.

One caveat for real geeks, regarding non-constant initialization of static variables: if you are initializing the same non-existing variable from mutliple threads with different values at the very same time, initial value expressions (including functions that you might call) might be executed in parallel in many thread and the final value that gets assigned to the same static variable from multiple threads would depend on which thread ends its execution last (as declared static variables are written back to global memory at the end of formula execution). To avoid that it is advised to use different prefixes in different formulas.
AFL: StaticVarInfo now adds support for "count" field that allows to count variables based on wildcard mach. StaticVarInfo( "prefix*", "count")
AFL: stricter checking for format string passed to printf() / StrFormat and against types of arguments passed

Now if you specify %s it won't allow you to pass non-string in argument list
In similar fashion if you specify %f, %g, %e it won't allow you to pass non-numeric argument
AFL: SumSince has new optional argument incFirst - SumSince( Condition, Array, incFirst = False ) that decides whenever first bar value when condition is true is included in sum or not
AFL: using PlaySound somehow slowed down other worker threads. Fixed by explicit termination of playback of previous sound.
Charts: flyout buttons for closing/rearranging chart panes now scale properly with changes in screen DPI
Indicator maintenance wizard automatically creates timestamped backup file (broker.newcharts.imYYYYmmddHHMMSS.bak) from broker.newcharts so in case of failure original broker.newcharts can be easily restored
New Analysis: add a notice / info in the backtest report when equity gained more from interest than from trades alone - indicating that results are based primarily on cash sitting idle than trading system. Also added the number of times liquidity limit was hit
QuickGFX: fixed crash with styleCloud when cloud was totally outside visible area (above top or beyond bottom of chart)
TDL #3818 revisited. There were more cases when worker thread attempted to read string from resources sometimes resource handle was set incorrectly, this caused COleException / unknown error. Fixed by replacing faulty MS CString::LoadString implementation
Tools: Indicator maintenance - added check for valid parent (property sheet)
UI: Edit->Delete range now supports multiple selection in the Symbol pane, so it can delete range of quotations from multiple symbols at once

As a reminder: multiple selection works when you hold down CTRL key and select individual items from list, or when you hold down SHIFT key and select first and last item from the list.
( https://forum.amibroker.com/t/afl-to-delete-quotes-before-a-specific-date-in-a-database/35777/8 )
UI: In XAML markup, units such as pt, in, cm and mm now scale properly to HiDPI
UI: Modal dialog boxes that aren't dismissed first flash but on next wrong click they move to mouse position
UI: Property Grid (Symbol Information/Account summary) expand buttons scale properly to HighDPI displays
UI: Start page uses system icon font and updated design with scalable vector icons
UI: Symbol->Organize Assignments full name column was not always refreshed initially (required click on radio button). Fixed
UI: XAML markup checkboxes now properly scale to HiDPI

CHANGES FOR VERSION 6.43.0 (as compared to 6.42.0)

WebResearch: implemented alternative browser engine - Chromium-based Edge - (currently this is 64 bit only feature)

Since Microsoft apparently wants to stop supporting Internet Explorer engine that many 3rd party programs use via CHTMLView MFC component,
and many web sites abandon support for IE HTML engine,
I have implemented alternative web browser based on Chromium/Edge WebView2 that is available on Windows 10+.
To use new web browser engine within AmiBroker you have to use 64-bit AmiBroker and do the following:
1. Download x64 WebView2 component from Microsoft
https://developer.microsoft.com/en-us/microsoft-edge/webview2/

2. In AmIBroker go to Tools->Preferences, "Miscellaneous" tab and turn ON the option "Use Chromium/Edge (WebView2) for Web Research"

3. Restart AmiBroker

From now you can use File->New->Web Research and it will use modern Chromium engine
AFL Editor: implemented multi-cursor navigation
AFL Editor: added inline "Info" messages that show which lines/functions cause looking into the future, can be turned off via Prefs/Debugger or via Tools->Options menu in AFL Editor
AFL Editor: added support for multiple selection editing (you can use CTRL+ left mouse button to place multiple cursors / selections and then typing would occur in sevaral places at once, also Alt+drag will make rectangular shape + multicursor in each lin
AFL Editor: implemented CTRL+D (multiple select add word / add next occurrence)
AFL Editor: implemented split window editing that allows to have two views on same file (Window->Split or Ctrl+\ (backspace))
AFL: added a warning 514 (not error for backward compat) to be issued when NEW LINE is detected in string literal
AFL: fixed uninitialized variable error when Plot() and subsequent graph0 variable reference was used inside same curly braces block
AFL: Invalid non-printable characters (such as \n) in Plot() name now generates warning, not an error, allowing badly written code to continue to work (so users not reading the ReadMe stop complaining).
AFL: TrimResultRows( row_count ) - trims the result list to specified number of rows, positive row count means counting from top, negative from bottom. TruncateResults( from_row = 10 )
Analysis: fixed possible CRT invalid parameter exception when user formula contained forbidden % character
Charts/Pref: increased upper limit of "Minimum X grid spacing" from 120 to 200 pixels for high-DPI displays
New Analysis: when symbol's quotes were filtered out completely due to padding to reference symbol, instead of blocking error dialogs, a summary of all affected symbols is displayed in the INFO tab
Parameter file (broker.params) now escapes control characters like \n to prevent corruption if user does not follow rule of NOT including control characters in parameter names/values
UI: Preferences: new tab "Text box" to define text-box font styles
UI: Text box tool - edit field now uses selected font style/size so it provides WYSIWYG display of what text would like on chart
UI: Text box tool - new combo box "Font style" to select one of 16 user-definable font styles

CHANGES FOR VERSION 6.42.0 (as compared to 6.41.0)

AFL: new field supported by GetOption("BHSymbol") - get Portfolio B&H symbol. Note that this is read-only (can't set it via SetOption)
AFL: one-shot auto-save of persistent static variables feature is now available via SetOption("StaticVarAutoSave", -1 )
Fixed possible crash when drawing pointer become invalid (now drawings are referred by bound checked index)
IQFeed: the plugin now has "Symbol guide" context menu option
IQFeed: the plugin now has an option to consolidate unbundled ticks (i.e. ticks with same TickID)
Scheduler: added "Pause" button to pause execution of scheduled tasks (batches already running will complete normally)
UI: If modal window is displayed (like Filter dialog) and user clicks on blocked parent 3 times in a row, the modal window is repositioned to where mouse cursor is, to bring attention of the user to the modal window that needs to be closed

CHANGES FOR VERSION 6.41.0 (as compared to 6.40.4)

64-bit version compiled now with new Visual Studio 2022
New Analysis: Exploration now supports "Show current trade arrows" command
QuickGFX: styleDots did not get bigger when width/thickness param is increased. Fixed.
QuickGFX: solid rectangle fill speeded upto 3x on larger areas
AFL Editor: When errors are detected the "Explain" button is added to the caption bar that displays help page with error explanation. Subsequent presses to "Explain" button move to next error message
AFL: added support for Python-style raw strings. Raw strings use letter r before double or single quote and don't perform espace sequence transformations, so you don't need to use \\ in paths if you use raw string: r"raw\string\syntax" or r'raw\string\sy
AFL: GfxDrawImage function, if underlying Windows LoadImage fails to load BMP file, the Windows last error code is printed to system debugger (DebugView)
ASCII import: duplicate lines in very large files caused unusual slow down, now duplicate lines are detected and removed early, improving import time in such unusual cases.
Easy alerts now display comment field content in Alert Output window
Report: Parameters in the report are now listed in alphabetically sorted order
UI: a message box is displayed when system returns from Sleep/Hibernation while being connected to RT plugin to make user aware NOT to use sleep while collecting real time data
UI: added "Start Page" that provides basic new user orientation, news and updates and links to open new charts, analysis, formulas, and other windows
UI: custom tools menu (Tools->Customize, "Tools" tab) allows now to run batches via #runbatch command. To run a batch, use #runbatch in "Command" field, and full path to batch (.abb) file in Arguments field
UI: custom tools menu command arguments now support special token {symbol} that gets replaced with currently selected symbol. This is to allow triggering for example AmiQuote downloads for current symbol only
Zoom and tab order stored in layout could be ignored when number of MDI windows was too large. Fixed

CHANGES FOR VERSION 6.40.4 (as compared to 6.40.3)

Charts: on specifically prepared formulas producing sparse array a moire effect with histogram chart can be seen under rare circumstances. Fixed.
UI: when Tickerbar was customized in previous versions it could come up as empty in 6.40.2 until it is RESET via customize dialog. Fixed.
QuickGFX, simple bar chart, width > 2, end caps are drawn to ensure that open/close ticks are visible in high zoom out levels
Toolbar Zoom in/out auto-repeat period decreased to 100ms (from 150ms)
QuickGFX: styleGradient wasn't supported in 6.40.2-6.40.3. Now it works again (fallback to GDI)
Docs: added GuiSetColors to help file
Charts: 3-color gradient charts could be drawn incorrectly if user-defined base line level was outside chart Y axis range. Fixed

CHANGES FOR VERSION 6.40.3 (as compared to 6.40.2)

OLE: new Quotations.Adjust could enter infinite loop. Fixed
QuickGFX: fixed division by zero on gradient fill when top == bottom
QuickGFX: styleDashed implemented
UI: on HiDPI screens Tickerbar dropdown item height was too small in 6.40.2. FIxed
UI: Ticker bar has been reimplemented to allow quick handling of millions of symbols (done in 6.40.2 but missing in change log)
UI: Ticker bar search / auto-complete is re-introduced (it was not working in 6.40.2 because TickerBar no longer uses standard combo box and combo box "built-in" features were absent)
UI: when Tickerbar was customized in previous versions it could come up as empty in 6.40.2 until it is RESET via customize dialog. Fixed.

CHANGES FOR VERSION 6.40.2 (as compared to 6.40.0)

AFL: regression new Error 72 was incorrectly generated when amount was zero but mode was set to Disable (like in Equity.afl file). The combination of zero amount and disable is of course valid and error is no longer produced in such case.
New Analysis window: #pragma sequence(scan,backtest) - and new "Run Sequence" button to run same formula with same settings several times in sequence using different modes
Charts: QuickGFX rendering of cloud style charts is now 100x faster
Charts: GDI rendering of cloud style charts is now 2x faster
32-bit/Charts: x87 assembly code used for faster conversion from float to int. This gives +20% performance improvement in both GDI and QuickGFX rendering modes
64-bit: the size of internal exit signal structure increased to allow backtest with more than 1 million symbols (at the cost of increased RAM usage). 32-bit version still uses smaller structure and 1 million symbol limit
AFL Editor: Defunct Print menu option removed from context (right-click) menu. Working Print option is available in File->Print menu
AFL: _SECTION_BEGIN() - section name is checked against not allowed control characters
AFL: array version of ColorHSB function is 50% faster now
AFL: new function BarsSinceCompare( past, comparison, current ) - for every bar, compare past array values with current bar value and return the number of bars since last time comparision was true
AFL: New warning 511 for incorrect usage of IIF function: "Assignment within IIF function arguments. Use IIF() return value instead"
AFL: Param*() functions check if user passed non-printable/control characters, that are forbidden in parameter names and display appropriate error message
AFL: Status("baseinterval") - new field "baseinterval" returns database base time interval setting in seconds
AFL: Warning 501 (assignment within conditional) is silenced if assignment is made to the variable that wasn't intitialized before (i.e. it is first assignment of given variable ever in code)
ASCII import: combination of $HYBRID 1 without "autoadd" mode produces an error on non-existing symbols now.
Charts: 40% speedup in determination of auto-scale min/max (signficantly affects chart rendering performance for very large number of bars >500K)
Charts: Bar-to-XPixel coordinate conversions speeded up 3x by using assembly in 32-bit and _div64/__emul intrinsics in 64-bit versions
Charts: when QuickGFX was enabled multi-color title text was slightly truncated at the color boundaries. Fixed.
DB: when user renames the symbol corresponding Note text file name is renamed accordingly now
Fixed regression introduced in 6.39 when the very last value in MA was non-Null even if there was not enough data
OLE: added Stock.Quotations.Adjust() function. long Adjust(BSTR pszFieldList, float fMultiplier, float fOffset, DATE dDateTime, boolean bBefore)
QuickGFX: New lines in Title variables caused double spacing. Fixed
QuickGFX: styleHistogram was invisible for negative values. Fixed
UI: Param window, names of parameters are not tructated on HighDPI screens anymore
When worker thread attempted to read string from resources sometimes resource handle was set incorrectly, this caused COleException / unknown error. Fixed by replacing faulty MS CString::LoadString implementation.
QuickGFX: Line width > 1 implemented
AFL: ADX/PDI/MDI protected against division by zero when data are completely flat (H == L == C for long periods of time)
AFL: Warning 512 added to detect overusage of Foreign/SeForeign calls
Analysis report charts: regression: when QuickGFX was enabled, report charts could cause exception. Fixed.

CHANGES FOR VERSION 6.40.0 (as compared to 6.39.1)

Charts: added experimental QuickGFX direct rendering technology. QuickGFX completely bypasses Windows GDI and offers amazing 10x-100x performance gain as compared to GDI rendering

To enable QuickGFX experimental tech go to Tools->Preferences, "Miscellaneous" tab, click "Experimental: Use QuickGFX render" and press "Apply" or "OK"
You can see when it is enabled, chart timing footnote (when enabled) will say "QuickGFX render ...ms" instead of "GDI render ...ms"
This is PROFESSIONAL edition feature only. Users of Standard version would need to purchase upgrade in order to use this feature.
AFL: New Javascript engine from MS EDGE called "Chakra" added. Use EnableScript("chakra") to enable it
AFL: Default Javascript engine upgraded to jscript9.dll - featuring native JSON object
AFL Editor: added "MOD" indicator in the status bar to indicator current formula was modified
AFL: variable period Sum() produces 0 instead of Null if range argument is 0 (or negative)
AFL: variable period Sum(), MA(), StDev() could produce incorrect results when 'range' parameter fluctuated between 0 and 1 only. Fixed
Analysis / Parameter dialog / ParamDate - after "reset all" it kept previously selected date and default was used only after reopening param window again. Fixed
Charts: BarCount is now included in "Chart timing" information
Copy/Paste from list view does not have trailing tab in the header line anymore
Data: Split feature: auto-suggested split ratio X:Y now uses X, Y <= 10 (previously it was X, Y <= 5)
If parser expression stack is exhausted Error 73: Internal parser error: memory exhausted is displayed
Plugin interface: SetCategoryName now prevents setting too long names (>=40) for groups/markets/sectors that could previously result in DB corruption
Tools->Database Purify is now >10x faster (in case of many reported errors even 100x faster than before)
UI: added ability to switch on/off data tips via customizable keyboard shortcut (Tools->Customize, Keyboard) View->Options->Data Tips
UI: added extra refresh for docking panes when they are expanded from the floating state

CHANGES FOR VERSION 6.39.1 (as compared to 6.39.0)

64-bit uses a bit faster float versions powf and modf instead of double pow/mod for ^ and % operators (non integers)
Analysis/Settings: added 3 checks and warnings to prevent users from entering combination of MinPosValue/MaxPosValue/AllowPosShrinking/RoundLotSize that are likely to prevent all trades from being taken at all
array ^ (exponentation) operator made 50-100x faster in special cases of small INTEGER, scalar exponents of 2, 3, 4 and 5 by using multiplication instead of calls to C runtime powf()
calling GuiSetText from AFL formula caused notifyEditChange notification to be sent. If user formula responded to notification with another GuiSetText this could create loops. Now notifications are silenced if changes come from user code
When one pane had Gui controls and the other pane on another chart sheet was completely blank, then GUI controls from populated tab remained displayed after switching to completely blank sheet. Fixed

CHANGES FOR VERSION 6.39.0 (as compared to 6.38.0)

64-bit: AmiBroker, AmiQuote, AFL Code Wizard migrated to newest VC++ 2019 for even better performance
AFL Editor: @link commands are executed at mouse up (instead of previous mouse down) to prevent unwanted text selection when message boxes are dismissed
AFL Editor: call tips (parameter information tooltips) now provide extra description about the function and its parameters (as of v6.39 only 20 functions have this extra info)
AFL Editor: debugging session is automatically terminated with appropriate notice when user attempts to edit the code during debugging (this saves mouse clicks that were needed to stop debug session in order to edit)
AFL Editor: previously when no text was selected and Prettify Code was choosen, the message box caused main frame to get focus instead of focus staying in AFL frame. Fixed
AFL Editor: when an runtime error is detected debugging session the message bar shows now number of detected errors (as it did previously during normal "verify"
AFL Editor: when dark mode list views are used watch window default text color was black making it hardly visible, changed to white
AFL/CBT: AmiBroker now displays an error when user passes incorrect bar number to ProcessTradeSignals() instead of silently skipping wrong arguments
AFL: added protection against assigning wrong types to some built-in variables such as *Price arrays. If wrong type is assigned the error 71 Type mismatch in assignment is displayed
AFL: ADX() function vectorized in 64-bit version (2x faster than before)
AFL: backtester crashed when user incorrectly assigned string value to BuyPrice/ShortPrice/CoverPrice arrays. Fixed.
AFL: Error("text", stop=False) function - added extra parameter to stop execution regardless of "stop execution at first error" preference setting
AFL: FindIndex( array, value, start_from = 0, dir = 1 ) - find index of array item matching specified value
Returns:
NUMBER - the index of matching array item
if value is not found in the array, the function returns -1

Parameters:
array - input data
value - what we are looking for
start - the index to start the search from
dir - the direction of the search, 1 is up, -1 is down

Notes:
start can be positive - then it refers to index number counting from the beginning of array
or it can be negative then it refers to index counting from the END of the array

// example find all indices when condition was true condition = Cross( C, MA( C, 20 ) ); // search forwards printf( "Search forwards:\n" ); for( index = 0; ( index = FindIndex( condition, True, index ) ) != -1; index++ ) { printf( "condition is true at index %g\n", index ); } // search backwards printf( "Search backwards:\n" ); for( index = -1; ( index = FindIndex( condition, True, index, -1 ) ) != -1; index-- ) { printf( "condition is true at index %g\n", index ); }
AFL: If warning level >= 3, InternetOpenURL() function now displays a warning 507 if OS generated exception when accessing remote resource, the same way as InternetPostRequest
AFL: increased calculated bar requirements for Wilders() function for better conformance with QuickAFL
AFL: Last OS error code is set by Internet* functions regardless of warning level so you can always retrieve it using GetLastOSError()
AFL: MA( C, BarCount ), StDev( C, BarCount ) return non-Null value
AFL: new field added to SetOption/GetOpion function calls "MaxPosValue" (per backtest setting)
AFL: new function InternetSetHeaders( "headers" ) - set custom HTTP headers for subsequent web requests
For example to enable GZIP compression you need to use:
INTERNET_OPTION_HTTP_DECODING = 65; InternetSetOption( INTERNET_OPTION_HTTP_DECODING, 1 ); InternetSetHeaders("Accept-Encoding: gzip, deflate");

- note that InternetPostRequest will automatically add "Content-Type: application/x-www-form-urlencoded" header unless user specifies their own Content-Type in the InternetSetHeaders call
AFL: new function InternetSetOption( option, value ) - set HTTP option for internet session. Internet Options can be found here: https://docs.microsoft.com/en-us/windows/win32/WinInet/option-flags

// how to request and handle GZIP compressed HTTP INTERNET_OPTION_HTTP_DECODING = 65; InternetSetOption( INTERNET_OPTION_HTTP_DECODING, 1 ); InternetSetHeaders("Accept-Encoding: gzip, deflate"); ih = InternetOpenURL("http://www.amibroker.com/news.html" ); if( ih ) { while( ( text = InternetReadString( ih ) ) != "" ) { printf( "%s", text ); } InternetClose(ih); }
AFL: new function MxCopy - for copying rectangular blocks from one matrix to the other (copy portions of one matrix to the other matrix)

The function works in-place (ie. no allocation occurs - first argument is a reference to existing array and that array content would be overwritten)
MxCopy( & dstmatrix, dst_start_row, dst_endrow, dst_start_col, dst_end_col, src_matrix, src_start_row = -1, src_end_row = -1, src_start_col = -1, src_end_col = -1 )

src_start/src_end values equal to -1 mean "same value as corresponding dst_start/dst_end value"

To perform a copy the number of columns multiplied by number of rows in source and destination "rectangles" must be the same
In other words:
(dst_end_row-dst_start_row+1)*(dst_end_col-dst_start_col+1) == (src_end_row-src_start_row+1)*(src_end_col-src_start_col+1)
AFL: new function: _exit() - that gracefully ends AFL execution at the point of the call
AFL: new function: InternetGetStatusCode function - returns HTTP status code of last InternetOpenURL or InternetPostRequest call. HTTP status codes are listed here: https://en.wikipedia.org/wiki/List_of_HTTP_status_codes

// Example: // NON existing page (should result in status code 404) ih = InternetOpenUrl("http://www.amibroker.com/index3434.html" ); if( ih ) { printf("HTTP status code: %g", InternetGetStatusCode( ih ) ); InternetClose( ih ); } else { printf("Internet connection can not be open because: %s", GetLastOSError() ); }
Analysis/Backtest: added "Max. position value" option in the settings allowing to specify maximum dollar value of position. Zero (0) means no maximum. Positions larger will be shinked (if shrinking is enabled) or won't be entered at all (if shrinking is d
Charts/Preferences: added Text Tool font setting independent from Axis font (Preferences->Miscellaneous page)
Charts: Text Box tool supports user-selectable font size now (selectable in Study Properties window)
Database: new 8-digit ICB structure implemented: https://www.ftserussell.com/data/industry-classification-benchmark-icb
Got rid of obsolete "Request data on save" setting that wasn't performing as expected
Plugin interface: added compatibility layer allowing old plugins to safely call functions even when they have modified signature (added new default parameters). When plugin calls function with less than expected number of arguments, missing some of defaul
When variable was passed to user function by reference, ++ operator inside had no effect on referenced variable (outside of function). Fixed.

CHANGES FOR VERSION 6.38.0 (as compared to 6.35.1)

64-bit version could produce "Invalid parameter" exception from CRT after backtesting when symbols under test had forbidden characters in them like "%". Fixed
64-bit version: address space layout randomization disabled by /DYNAMICBASE:NO linker option to facilite easier crash location finding
AFL: assignment new matrix value to a variable already holding matrix value did not immediately free memory (at the time of assignment). This memory was only freed at the end of the formula. Now it is freed earlier (at assignment) to lower memory usage.
AFL: GetFnData("lastsplitdate") returns empty val instead of zero if last split date is not set
AFL: GfxDrawImage with PNG file could fail if very same file was accessed simultaneously from multiple threads due to "no-sharing" mode that 3rd party XTP lib used. Fixed by using shareDenyWrite
AFL: new function Chr( code ) returns string representing single character of given ascii code
AFL: new function GetObject( path, class ) providing functionality equivalent to JScript GetObject and VBScript GetObject
AFL: new function GuiSendKeyEvents("ED") - register given characters to be sent as Gui event when keyboard key is pressed. GuiGetEvent will return code == notifyKeyDown and id of given character, for example id == 'D' for D letter
AFL: StaticVarAdd when scalar value was added to already existing static var array sometimes random value would appear. Fixed.
AFL: when file creation or modication date was exact midnight fgetstatus() returned datetime indicating "eod mark" (date without time), now it gives 00:00:00
Analysis: Maximum number of threads per single Analysis window has been increased to 64 (from 32)
Backtester: generation of Buy&Hold stats was not working when "Allow position shrinking" was turned OFF by the user and commission > 0. Fixed
Chart: Data window can now display upto 40 values per single chart pane
Chart: Horizontal line snap to open price (keypress O) or close price (keypress C) was snapping to H-L instead. Fixed
Charts: Snap to price - the meaning of threshold is changed - instead of % of price it now means % of chart height. So 5% will snap within +/-5 of chart height. This allows it to work universally across different securities (stocks/forex) and different zo
IQFeed: improved IQFeed plugin (better support for long EOD histories in mixed mode)
New Analysis: the name of column "contracts/shares" changes each time you change futures mode to prevent confusion among newbies
Plugins: when AFL plugin crashes (throws structured exception) the editor and indicator windows will display call stack for easier debugging of 3rd party plugins
UI: Dialog boxes are moved back main display screen if multi-monitor configuration was changed and multi-monitor setup is not rectangular (for example monitors of different sizes)
UI: Listview sorting by (single) date column is now 10+ times faster
UI: Listview uses non optimized parsing for str to date conversion for date formats that include names of the months instead of numbers (avoids problems with different names of months in different languages)
UI: Main window and AFL Editor frame is moved back to (0,0) if multi-monitor configuration was changed and multi-monitor setup is not rectangular (for example monitors of different sizes), so saved position falls outside currently available working area
UI: MDI Close/Minimize/Restore buttons are now HighDPI aware
UI: MDI Tab client window buttons are now HighDPI aware
UI: Minimized flicker during docking panes resize by disabling Windows copy bits
UI: Toolbar split-popup buttons are now HighDPI aware
x64 eSignal: reverted to more compatible version compiled with VC2005

CHANGES FOR VERSION 6.35.1 (as compared to 6.35.0)

When .abb file was saved in older version and was missing Param2 then Param was incorrectly used as default value. Fixed.
Changed threshold year for two digit year data files to 25 (previously it was 20). So YY is now interpreted as 19YY when YY < 25, otherwise it is interpreted as 20YY

CHANGES FOR VERSION 6.35.0 (as compared to 6.31.0)

AFL: new function inverf(x) - inverse of erf function
AFL Editor: added function navigation combo box in the toolbar - detects user defined functions and allows to quicky navigate to function definition
AFL: GetOption("PadAndAlignToReference") allows to query Pad and align setting status (note that this is read-only field, so it will not work with SetOption)
AFL: new function erf(x) - computes Error function https://en.wikipedia.org/wiki/Error_function
AFL: parser warns if empty body is used in 'for' statement, like this: for( i = 0; i < 10; i++) ; // extra semicolon at the end - empty body Warning 510
AFL: parser warns if empty body is used in 'while' statement, like this: while( condition ) ; // extra semicolon at the end - empty body Warning 510
AFL: SafeDivide( x, y, valueifzerodiv )- safe division that handles division by zero using special handling (replace result with user-defined value)
Batch: added optional parameter to Data Import ASCII command to allow specify format definition file
Batch: added optional parameter to Execute and Wait command to specify current working directory for command
Batch: added optional parameter to Export to File / Export walk-forward to file to specify column separator in CSV files
-optional parameter defines the column SEPARATOR used for export. Only single character is used. When it is not supplied, comma is used.
Batch: Clipboard Cut/Copy/Paste implemented in batch editor
Batch: Edit->Delete (from main menu) and Edit-Delete All implemented for completeness
Batch: list view uses virtual mode now (owner data)
UI: All owner-draw list views (NOT in dialogs) now feature customizable theme (currently available "system (light) theme" and "black theme") - go to Tools->Customize, "Appearance" tab, "Dark mode for listviews" checkbox
UI: Analysis and RT quote window use now exactly the same RGB values for up/down (green/red) colors for consistency
UI: Custom virtual listview (owner data) supports per-item data now (SetItemData/GetItemData work with LVS_OWNERDATA)
UI: Found workaround to avoid terrible flicker and bad rendering of list view controls during fast page up/down and side scrolls (even though they are double buffered by Windows and in theory should be smooth).
UI: Identified even more bottlenecks in Windows OS that caused even owner data and owner draw Listview performance to suffer with large number of columns. OS code circumvented. Listview redraw speeds increased more than 5x compared to previous speedy implementation
UI: Implemented resizing of Listview column customization dialog

CHANGES FOR VERSION 6.31.0 (as compared to 6.30.0)

AFL: Access violation in PercentRank when period is wrong (Null/unitialized). Now error 52 is displayed instead.
AFL: InternetPostRequest now silently (or with warning 507 under debugger) returns NULL handle instead of error when remote server responds with HTTP Status 50x
Analysis: manual column re-sorting could be bit off if scientific output format (xxxEyyy) was used with different exponents. Fixed.
ASCII importer now handles LastSplitRatio of X:Y where X and Y are 1...32767 (previously only 1..127)
Batch: add "add results to watchlist" action / WatchlistAddResults
Batch: add "clear watchlist" action / WatchlistClear
Batch: add "comment" action
Core/DB: fixed access violation when all data were removed while QuickData was turned on
DebugView: eliminated some internal messages from DebugView output (from release version)
InternetPostRequest - even if URL started with https, previous version wanted to connect to port 80, instead of 443. Fixed.
UI/Listview: since 6.28 exception could occur if single cell text length exceeded 1024 characters. Fixed.
When database is empty, ticker box displays <No symbol> grayed text instead of blank or reminiscent of previous database symbol

CHANGES FOR VERSION 6.30.2 (as compared to 6.30.0)

AFL Editor: @link command now works on single click (instead of double click)
AFL Editor: multiple error messages per single code line are now differentiated and lead to different user guide pages when clicked
AFL Editor: When mouse hovers over the error message the mouse cursor changes to "Hand" and the error message is clickable as normal "link" leading to users guide description of error message
AFL: ApplyStop with ExitAtStop=2 parameter when used together with backtestRegular mode did not trigger stops in 6.25-6.30. Fixed.
AFL: new function InternetPostRequest( url, data, flags = 0 ) - allows to make POST HTTP requests

ih = InternetPostRequest( "http://server_name_here.com/testpost.php?param3=7&m4=8", /*POST DATA*/ "param1=9&m2=12" ); if( ih ) { while( ( str = InternetReadString( ih ) ) != "" ) { printf( "%s", str ); } InternetClose( ih ); } // testing code (server side ) in PHP: <?php echo "Post variables: \r\n"; foreach ($_POST as $key => $value){ echo "{$key} = {$value} \r\n"; } echo "Get variables: \r\n"; foreach ($_GET as $key => $value){ echo "{$key} = {$value} \r\n"; } ?>
AFL: Now() function supports format = 11 - returns Unix timestamp (number of seconds since Jan 1, 1970)
AFL: OscP/OscV could cause exception in unlikely event when entire Close or Volume array was filled by Null values. Fixed
Docs: added detailed descriptions of Warnings 504, 505, 506, 507, 508 and 509, Errors 63, 64, 65, 66, 67, 68, 69, 70
Docs: updated documentation on ApplyStop to include activationFloor
Intraday date axis hours could show 24:00 when negative timeshifts were defined in the settings. Fixed
Matrix variables that were passed to single-argument math functions (sqrt, exp) did not have their ref count updated correctly. Fixed.
Plugins are now loaded from work_dir\Plugins if exe_dir\Plugins folder does not exist
Pref: "Ask before closing indicator pane" is now turned on by default
Pref: Misc/ Max Number of decimal places in titles and RT quote bumped o 7
UI: In 64-bit version only the .AFL extension in the editor window caption was removed. Fixed.
Web Research predefined profiles: removed "MarketWatch" because the site is not available anymore

CHANGES FOR VERSION 6.30.0 (as compared to 6.29.0)

AFL: GfxSelectPen function - added support for geometric pens (including flat endcap):

PS_ENDCAP_FLAT = 0x200; PS_ENDCAP_SQUARE = 0x100; GfxFillSolidRect( 100, 80, 200, 260, colorGreen ); // flat end cap GfxSelectPen( colorRed, 10, PS_ENDCAP_FLAT ); GfxMoveTo( 100, 100 ); GfxLineTo( 200, 200 ); // square end cap GfxSelectPen( colorRed, 10, PS_ENDCAP_SQUARE ); GfxMoveTo( 100, 120 ); GfxLineTo( 200, 220 ); // round end cap (default) GfxSelectPen( colorRed, 10 ); GfxMoveTo( 100, 140 ); GfxLineTo( 200, 240 );
AFL: GuiEnable( id, enable ) - enables / disables GUI control. Disabled control can not be clicked and has "grayed" look
AFL: GuiGetValue( id ) - gets the value of GUI control (for example slider position). For non-slider controls value is number representing control text converted to number)
AFL: GuiSetValue( id, value ) - sets the value of GUI control (for example slider position). For non-slider control value will be converted to text and assigned as GuiSetText( id, NumToStr( value ) )
AFL: GuiSetVisible( id, visible ) - shows/hides GUI control
// control identifiers idSlider = 1; idEnable = 2; idDisable = 3; idShow = 4; idHide = 5; function CreateGUI() { if ( GuiSlider( idSlider, 10, 30, 200, 30, notifyEditChange ) == guiNew ) { // init values on control creation GuiSetValue( idSlider, 5 ); GuiSetRange( idSlider, 1, 100, 0.1, 100 ); } GuiButton( "enable", idEnable, 10, 60, 100, 30, notifyClicked ); GuiButton( "disable", idDisable, 110, 60, 100, 30, notifyClicked ); GuiButton( "show", idShow, 10, 90, 100, 30, notifyClicked ); GuiButton( "hide", idHide, 110, 90, 100, 30, notifyClicked ); } function HandleEvents() { id = GuiGetEvent( 0, 0 ); switch ( id ) { case 2: GuiEnable( idSlider, True ); break; case 3: GuiEnable( idSlider, False ); break; case 4: GuiSetVisible( idSlider, True ); break; case 5: GuiSetVisible( idSlider, False ); break; } } CreateGUI(); HandleEvents(); Title = "Value = " + GuiGetValue( idSlider );
AFL: Hexadecimal numbers can be now written using 0x prefix (as in C/C++)
AFL: In 6.29 GfxSelectPen function was not functioning without geometric style. Fixed.
AFL: InternetOpenURL( url, flags = 0 ) - added 'flags' parameter

Note 1: Flags are the same as defined by WINAPI, examples:
INTERNET_FLAG_RELOAD = 0x80000000;
INTERNET_FLAG_NO_COOKIES = 0x00080000;
Flags should be combined using binary OR operator: |

Note 2: ASCII transfers are used always

INTERNET_FLAG_RELOAD = 0x80000000; INTERNET_FLAG_NO_COOKIES = 0x00080000; // Example don't use cached content and don't use cookies ih = InternetOpenURL( "http://www.google.com", INTERNET_FLAG_RELOAD | INTERNET_FLAG_NO_COOKIES ); InternetClose( ih );
AFL: new function GuiSetRange( min, max, step, ticfreq ) - sets the min-max range of slider control
if( GuiSlider( 1, 10, 30, 200, 30, notifyEditChange ) == guiNew ) { // init values on control creation GuiSetValue( 1, 5 ); GuiSetRange( 1, 1, 100, 0.1, 100 ); } Title = "Value = " + GuiGetValue( 1 );
AFL: new function GuiSlider( id, x, y, width, height, notifyflags ) - creates slider control
AFL: new function remap( x, fromMin, fromMax, toMin, toMax ) - performs re-mapping from one range to another, works on scalars and arrays
AFL: When OLEDATE type (read from OLE objects) is assigned to AFL variable it gets converted to string using ISO format (YYYY-MM-DD HH:MM:SS). Time part only appears for records within non-zero time component
ASCII import: Aux1/2 fields can now be imported separately from two different files (combined) when using $HYBRID
In 6.29 estimated number of optimization steps displayed in 'warning' in case of tiny (fractional) step increment may be lower than actual number of steps
In 6.29, due to changes, some chart Gui* controls (owner draw) did not repaint on window resize. Fixed.
UI: File->New Database-> Create button now recursively creates all missing directories if multiple nested non-existing dirs were typed in
UI: new databases are now created in separate "databases" subfolder by default

CHANGES FOR VERSION 6.29.0 (as compared to 6.28.0)

AFL: added GuiDateTime function

lastdate = StaticVarGetText("lastdate"); if( GuiDateTime( 100, 10, 35, 200, 30, notifyEditChange ) == guiNew ) { GuiSetText( lastdate, 100 ); _TRACE("new!!!!"); } id = GuiGetEvent( 0, 0 ); code = GuiGetEvent( 0, 1 ); if( id == 100 && code == notifyEditChange ) { lastdate = GuiGetText( 100 ); StaticVarSetText( "lastdate", lastdate ); } Title = "" + lastdate; Plot(C,"t", colorRed );
AFL: Gui creation functions (GuiButton, GuiEdit, GuiDateTime and others) return guiNew (1) when control is newly created or guiExisting (2) when control already exists. This is useful for one-time initialization when control is being created.
AFL: InternetSetAgent("agent") - new function to set user agent for InternetOpenURL
AFL: new Error 70 - displayed on attempt yo use InternetSetAgent when it is already set or connection was already open
Analysis: added Notice 802: Trade size limite of X% of entry bar volume has been hit N times.
Charts: Vertical line (Y axis line) between chart area and Y axis scale is drawn with ZOrder = 0 instead of ZOrder = 128
Charts: Y-axis scale for huge negative values (below minus 1 billion) was incorrect. Fixed
File: Chart template, complete now also saves the content of files included using #include_once
New Analysis: decreased number of cases when IEEE rounding of fractional steps result in one step less than naive expecation in optimization
UI: 'Backtest settings' caption changed to 'Analysis Settings' and changed the layout of 'general' tab - data settings (that apply to everything mode) grouped separately from purely backtest settings
UI: increased number of user-definable Tool window menu items to 20 (from 10)

CHANGES FOR VERSION 6.28.0 (as compared to 6.27.1)

AFL: AddToComposite will issue error 69 if user passes field code other than "O", "H", "L", "C", "V", "I", "1", "2", or "X"
AFL: another protection for users shooting themselves in the foot: AddToComposite will issue error 68 when user passes invalid symbol string (empty or with characters like comma or new line or tab)
AFL: improved type checking for bad type of array arguments
AFL: New warning 508 is displayed if same category type is used multiple times in the Filter settings window and formula calls GetOption("FilterInclude*") or GetOption("FilterExclude*). Code using such statements is incorrect for such filters.
AFL: now you can pass references as arguments to built-in funcitons and they will be automatically dereferenced ("by value" sematics enforced)
AFL: user-defined functions that return matrix reclaim memory faster than before to avoid large memory consumption on super-long loops calling them
AFL: VarGet was not working properly with matrices on 64 bit version. Fixed.
AQ: 3.29 - when current working directory is set incorrectly it sets it back to where it should be. Correct working dir is required for relative paths to work
Backtest: interest earned on cash balances and charged on margin load is reported separately in backtest report now (if non-zero)
Core: sizes of some hash tables increased to speed up lookups
enable_static_decl created prefixes in original case (both upper and lowercase). Since StaticVar* functions always use lowercase names this made them unable to read declared statics other than all lowercase. Now declared variables are internally lowecase
Gui control custom colors - defaults changed to use Windows default "hot" color (blue) for hover outline and (hover + selected) state is now drawn with hover border and text but 'selected' background
GuiGetCheck returned 0 on owner draw toggle (custom colors) due to Windows limitation. Fixed.
IB plugin: right mouse button click : Backfill Current was causing exception for symbols longer than 26 letters. Fixed. (Version 2.0.10)
If user formula had run-time errors and produced zero trades the "Info" tab issued "Reporting has been turned off by SetOption" since there was no report generated but not because of option, but because of formula error. Fixed (the message is not displaye
IQFeed: in mixed mode EOD data got preference if there is not enough room to fit all intraday and all eod in defined "number of bars"
New Analysis: added 'notices' to Info tab that inform the user about potential problems and recommended actions. Currently one notice is displayed when user tries to use ranking or composites without enabling padding. Will add more notices in the future
New Analysis: progress bar will not display "remaining time" until at least one step is completed. Also if remaing time is > 2 billion years it will display (unknown), and will report remaing time in million years if necessary (for example when user star
Setup 64-bit: program and all plugins use newest compiler and newest VC++2017 runtime
Setup 64-bit: activation key should work without installing VC2005 runtime
UI: "OK" button appears on splash screen only if it does not auto-close

CHANGES FOR VERSION 6.27.1 (as compared to 6.26.0)

AFL Editor: preprocessor command (#include/#include_once/#pragma) are highlighted with different color to give visual clue that preprocessor command is NOT regular code
AFL: #pragma enable_static_decl accepts prefix given in quotation marks (as regular string).
#pragma enable_static_decl "myprefix{chartid}"
AFL: due to changes in 6.25 BETA TimeFrameSet applied on 1-tick base interval could result in division by zero exception. Fixed.
AFL: Error 66 has new meaning now. It is issued to prevent attempts to mix static declarations with old style access. Error 66. Variables with '---' prefix are inaccesible via StaticVarGet/Set/Remove in this formula. This prefix is reserved by #pragma ena
AFL: Removed Error 66: invalid identifier from VarSet/VarGet. Instead of issuing error message, VarGet/VarSet automatically sanitizes invalid identifiers by replacing all characters other than digits and A-Z, a-z letters by underscore
AFL: runtime tokens {chartid}, {symbol}, {interval} are now supported in #pragma enable_static_decl
AFL: SetFormulaName - displays error 67 if user tries to use file-system forbidden characters for formula name
AFL: StaticVarRemove() when called with EMPTY string: StaticVarRemove("") nullifies all static variables declared with static keyword within given formula, so this:#pragma enable_static_decl(test) static _x, _y, _z; _x = 1; _y = 2; _z = 3; StaticVarRemove(""); // nullify all declared static variables printf("%g %g %g", _x, _y, _z );is equivalent to writing
#pragma enable_static_decl(test) static _x, _y, _z; _x = 1; _y = 2; _z = 3; _x = Null; _y = Null; _z = Null; printf("%g %g %g", _x, _y, _z ); // note that setting declared static variable to Null value results in removing it from memory StaticVarRemove("")- returns number of variables nullified. Returns 0 on failure (no declared static variables found in current formula)
AFL: when declared static variable is assigned the NULL value, it will be removed from memory when formula finishes
ASCII importer: importer logged "ran of industry space" even if it didn't. Fixed.
CBT: If user called ApplyStop AND calls EnterTrade from low-level backtest and did not switch backtestRegular mode to raw mode (which should be done), backtester would automatically turn on 2nd phase stops handling to prevent crash
Charts: a crash could occur if user had lots of drawn trendlines on multiple panes and some of them had start date BEFORE first available bar and RT stream was frequently updating. Fixed.
Make #pragma enable_static_decl is now private functionality. This means that it will work just fine but we don't provide any help/support except of what is written in readme/manual
New Analysis: you can now copy dates between "From" and "To" date pickers (right click menu or Ctrl+C/Ctrl+V)
UI: Bar replay From-to controls support copy-paste (right click or Ctrl+C/Ctrl+V)
UI:added preprocessor color picker in Tools->Preferences, "Editor"
6.27.1 fix: In 6.27.0 VarSet did not work properly. Fixed.
6.27.1 fix: Backtest: since 6.25 crash could occur if "detailed log" was enabled and trade was not entered due to unsufficent funds because format string was not matching arguments. Fixed.

CHANGES FOR VERSION 6.26.0 (as compared to 6.25.0)

AFL: new static keyword: declare identifier as static variable - a little 'revolution' in static variable use, declare variable as static and use as 'regular' variable, no need to call functions

// the pragma below is required to enable support for static declarations // it also defines the prefix which is added to variables declared with static keyword // it is one prefix per formula. #pragma enable_static_decl(prefix) // it is really good idea to consequently use naming convention that // distinguishes declared static variables from the others // we highly recommend using UNDERSCORE '_' before all declared static variables // so they can be easily spotted in the code // The other choice could be s_ prefix static _myvar; // this var is also accessible by "prefix_myvar" printf( "This variable is really static %g", _myvar++ ); // keep in mind that for speed static variable is read only once at the declaration // and saved only once - when formula execution is completed // This way declared static variables offer same speed as regular variables (no speed penalty)
AFL Editor: contrast of error location indicator on dark backgrounds increased
AFL Editor: C-style comments /* ... */ are now foldable in the editor
AFL Editor: new menu choices View->Fold Comments / Unfold Comments - allow to fold/unfold all multi-line comments (enclosed with /* .... */)
AFL: added constants notifyClicked, notifySetFocus, notifyKillFocus, notifyHitReturn, notifyEditChange, notifySelChange, notifyMouseEnter, notifyMouseLeave
AFL: Another protection against users shooting themselves in foot, VarSet/VarGet now displays error when you try to use characters different than A-Z, 0-9 and '_' in variable names
AFL: Attempt to use single subscript on matrix variable now results in error message "Accessing Matrix elements requires two subscript operators"
AFL: Due to the fact that Windows may send WM_MOUSEMOVE message even if mouse did not move, AmiBroker now has internal check that prevents ReqestMouseMoveRefresh from triggering if mouse position did not change
AFL: GetLastOSError (for getting last error message from Windows) - allows getting information about and handling of runtime OS errors

// Example 1: fh = fopen("non_existing_file.txt", "r" ); if( ! fh ) { printf("File can not be open because: %s", GetLastOSError() ); } // Example 2: ih = InternetOpenUrl("http://non_existing_host.com" ); if( ! ih ) { printf("Internet connection can not be open because: %s", GetLastOSError() ); }
AFL: GuiButton and GuiToggle in native OS style use background color of the chart for small border instead of default grey
AFL: GuiButton/GuiCHeckBox/GuiToggle/GuiRadio support now new events notifyMouseEnter (64) and notifyMouseLeave(128) which detect hovering without need for constant refreshes

#pragma enable_static_decl(myprefix) static _counter; flags = notifyMouseEnter | notifyMouseLeave; GuiButton("test", 1, 20, 20, 100, 100, flags); GuiCheckBox("test 2", 2, 200, 20, 200, 20, flags ); GuiSetColors( 2, 2, 0, colorRed, colorBlue ); Title = StrFormat( "%s. Refresh # %g\n", GuiGetEvent( 0, 2 ), _counter++ ); nc = GuiGetEvent( 0 , 1 ); if( nc == notifyMouseEnter ) GfxTextOut( "MOUSE ENTER", 200, 50 ); if( nc == notifyMouseLeave ) GfxTextOut( "MOUSE LEAVE", 200, 50 ); _TRACE(Title );
AFL: GuiCheckBox and GuiRadio now support custom colors of text and background
AFL: In 6.25 Gui* keyboard navigation interferred with delete key and possibly other shortcuts due to the way how windows works. Implemented workaround so keys are only intercepted if child window (control) has focus.
AFL: In 6.25 Gui* keyboard navigation was turned on by default, now it is off by default but can be turned on if you use SetOption("GuiEnableKeyboard", True )
AFL: In 6.25 GuiGetCheck returned -1 on unchanged. Now it returns only 0 (unchecked) or 1 (checked)
AFL: In case of Windows INET API error, Internet* functions now report Warning 507 instead of generic error 47. Warning 507 is Level-3 warning, i.e. editor-only, which means it will pop up in the formula editor, but won't break execution in runtime (indic
AFL: Now can use subscript operator [ ] on references to arrays and matrices
AFL: Passing by reference does not create nested references in user-defined function calls
AFL: VoiceSetRate( rate ) - sets SAPI voice (speech synthesis) rate. Rate of 0 (zero) is "normal", negative is slower, positive is faster (allowable range -10..+10)
AFL: VoiceSetVolume( volume ) - sets SAPI voice (speech synthesis) volume (0..100)
AFL: VoiceWaitUntilDone( timeout ) - waits until voice has finished speaking or specified timeout (1..100ms) has elapsed. Returns True if voice finished, False if the timeout elapsed

VoiceSetRate( -10 ); Say("I am speaking slowly", False); while( ! VoiceWaitUntilDone( 100 ) ); printf("Done 1\n"); VoiceSetRate( 0 ); Say("I am speaking normally", False); while( ! VoiceWaitUntilDone( 100 ) ); printf("Done 2\n"); VoiceSetRate( 5 ); Say("I am speaking fast", False);
broker.master file is saved to a new name and renamed later to avoid corruption when Windows decides to shutdown, restart or sleep during save
Dev: 64-bit new compiler (VC2017) broke backward compatibility with singletons that UI lib uses causing infinite loop when High Contrast scheme was used. Workaround implemented.
Misc: 64-bit: Restored correct manifest (from pre6.22) with compat records so Win 10 does not lie about version number and re-added 24-bit large PNG icon
New Analysis: Added support for clickable links. If you put @link URL in any cell of Analysis result list it creates a clickable row. If you double click on the row while holding down ALT key it will open the link

AddTextColumn("@link http://www.amibroker.com/", "double click me with ALT key"); // Hidden links are possible if you add the @link in the column past the last defined one AddRow( "ticker\tdatetime\ttest\t@link http://www.amibroker.com" );

CHANGES FOR VERSION 6.25.0 (as compared to 6.22.0)

64-bit: In 6.22 the array division could produce 1ulp (units at least place) rounding errors due to too excessive new VC++2017 compiler optimizations. Workaround implemented to avoid that.
Added support for formatDateTimeISON (ISO format NO dashes: YYYYMMDD for end of day and YYYYMMDD HHMMSS for intraday)
AddColumn( DateTime(), "dt", formatDateTimeISON );
Filter = 1;
AFL Editor: added one-time message "In the Debug mode number of bars is limited to 200 bars. You can change it in Tools->Preferences, Debugger tab" because users don't read docs
AFL: ApplyStop now has 8th argument: ActivationFloor that defines the amount of profit (in dollars or percents, according to stopmode) that must be exceeded before stop is activated
AFL: Gui* - controls are created in the order of occurence in AFL formula (instead shuffled or reverse as in previous version)
AFL: Gui* - keyboard navigation is now enabled (you can tab between controls and use arrows to navigate control groups such as radio boxes)
AFL: IsNull() accepts matrix input and returns 0 (False), i.e. "variable is not null" if variable is of matrix type
AFL: math functions such as sin(), sqrt(), etc can now be applied to matrices (element-wise operation) (previously such attempt resulted in access violation)
AFL: New feature: Passing arguments as reference (allows modification of arguments passed - easy way to return multiple values), to pass by reference use & (address-of) operator before variable identifier
Reference is actually a pointer to (address of) the variable. If it is passed to function it allows original variable to be modified.
The difference between AFL and C language is that while you are using address-of operator when you call function,
you don't need any special syntax in the function itself. This has advantage that same function can be called with arguments passed by value and by reference
and which one is used is just directed by the way you call the function. AFL automatically and transparently knows that it needs to dereference addresses when
references are used in aritmetic operations, function calls or assignments.
function test( x, y )
{
x += 1;
y += 2;
}

a = 23;
b = 25;
printf("Before function call: a=%g, b=%g\n", a, b );

test( &a, &b ); // pass references (variables get modified)

printf("After function by ref call: a=%g, b=%g\n", a, b );

test( a, b ); // pass values (no modification happens)

printf("After function by val call: a=%g, b=%g\n", a, b );
AFL: new function GuiCheckBox - creates check box
AFL: new function GuiGetCheck( id ) - gets 'checked' or "ON" state of toggle, checkbox and radio buttons
AFL: new function GuiRadio - creates radio button
AFL: new function GuiSetCheck( id, checked ) - sets 'checked' or 'ON' state of toggle, checkbox and radio buttons
AFL: new function GuiSetFont( "fontface", size )
AFL: new function GuiToggle - creates toggle button (like normal button but it toggles between "on" and "off" state with each click)
AFL: SetOption("OptimizeSaveParams", True ); - turns on generation of AFL file that contains values of optimization parameters producing best result. The generated file has the same name as formula run but has .opt.afl extension

This functionality is provided to simplify creation of auto-optimization schemes
How to use:

1. Create your main formula, say it's file name is "Formulas/Custom/MainFormula.afl"
2. Create your opt param formula: "Formulas/Custom/MainFormula.opt.afl"
In the opt param formula type:
// This file will be automatically overwritten by optimizer with best values
first_param = 6;
second_param = 12;

3. In the main formula type:

#include "Formulas/Custom/MainFormula.opt.afl"

x = Optimize("first_param", first_param, 3, 10, 1 );
y = Optimize("second_param", second_param, 11, 30, 1 );

// causes automatic generation of MainFormula.opt.afl
SetOption("OptimizeSaveParams", 1 );

// dummy system using two params
Buy = Cross( C, MA( C, x ) );
Sell = Cross( MA( C, y ), C );

4. Run optimization

After it is complete MainFormula.opt.afl will be overwritten with optimum values
AFL: When using TimeFrame functions, QuickAFL now uses ratio of requested_interval/current_interval multipled by 30 to better estimate required bars
ships with newest AmiQuote 3.22 (see AmiQuote read me for details)
Analysis: Detailed log displays information about ignored ScaleIn/Outs because of insufficient funds or trade size constraints
Analysis: Detailed log now displays all warnings about skipped/ignored signals in RED color so they are easier to spot
Data: when performing X:Y split and X or Y exceeded 255 the factor was incorrectly displayed (negative) in the Symbol window. Fixed.
formatDateTimeISO and formatDateTimeISON added to syntax highlighter definitions
Scheduler: Repeat "Daily" mode repeated batch run every day even if some days were unchecked. Fixed.
UI: Place Order dialog - allows typing stop distances smaller than 0.1 now
UI: Prefs/Charting: Turning on "Collapse parameter sections" option causes all sections in Parameter window to be collapsed (NOT good idea for newbies as they wont see the controls !)
Web Research: many HTML5 pages did not display properly because of the fact that web browser used old IE7 mode. Now browser uses IE11 mode at minimum for proper HTML5 rendering

CHANGES FOR VERSION 6.22.0 (as compared to 6.21.0)

64-bit: migrated all code to new compiler VC++2017 which seems to produce better code for x64 resulting in 30...50% speed improvements for many AFL functions. The only negative seems to be much bigger runtime libs
64-bit: AFL: Sum() function 2x faster
64-bit: AFL: Max() and Min() functions 8x faster
64-bit: AFL: Ref() funciton 2x faster
64-bit: AFL: MACD(), ROC(), StDev(), LinearReg() and many other functions faster by 30-50%
AFL: GetExtraData does not trigger code check and profile warning about referencing future quotes if plugin implements new GetExtraDataEx function
AFL: GuiEdit complained about 2nd parameter instead of 1st (being less than zero)

CHANGES FOR VERSION 6.21.0 (as compared to 6.20.1)

AFL: decreased memory fragmentation when user changes type of variable from array to scalar and back thousands of times
AFL: GuiButton( "Text", id, x, y, width , height , notifyflags ) - creates a button
"Text" is a text to be displayed on the button
x, y are pixel coordinates of top-left corner of the control
width, height are pixel width and height of the control
notifyflags - decides which events fire execution of your formula, it can be any combination of values below
1 - clicked (button)
2 - setfocus (all)
4 - killfocus (all)
8 - hit enter/return key (edit)
16 - edit change (edit)
AFL: GuiEdit( id, x, y, width, height, notifyflags ); - creates an edit field
x, y are pixel coordinates of top-left corner of the control
width, height are pixel width and height of the control
notifyflags - decides which events fire execution of your formula, it can be any combination of values below
1 - clicked (button)
2 - setfocus (all)
4 - killfocus (all)
8 - hit enter/return key (edit)
16 - edit change (edit)
AFL: GuiGetEvent( num, what = 0 )
what = 0 - ID of control that received event (number)
what = 1 - the notification code (number)
what = 2 - the ID, the code and the notification description as text (string)
num parameter defines the index of notification in the queue. 0 is first received (or "oldest") since last execution.

Usually there is zero (when formula execution was not triggered by UI event) or one event in the queue but
note that there can be MORE than one event notification in the queue if your formula is slow to process. To retrieve them all use increasing "num" parameter as long as GuiGetEvent does not return zero (in what =0, =1 mode) or empty string (what=2).

// read all pending events
for( i = 0; id = GuiGetEvent( i ); i++ )
{
code = GuiGetEvent( i, 1 );
text = GuiGetEvent( i, 2 );
}
AFL: GuiGetText( id ) - get text from control
AFL: GuiSetColors( idFrom, idTo, border , clrText = -1, clrBack = -1, clrBorder = -1, clrSelText = -1, clrSelBack = -1, clrSelBorder = -1, clrHoverText = -1, clrHoverBack = -1, clrHoverBorder = -1, clrDisText = -1, clrDisBack = -1, clrDisBorder = -1)

idFrom, idTo - define range of control IDs that will use new colors. To set color for single control use the same value for both idFrom and idTo
border - defines border width of button (does not affect other control types)
clrText, clrBack, clrBorder - define colors of control text (fgcolor), background (bgcolor) and border (if border width is > 0 ) in "default" control state (unselected)
selectfgcolor. -1 means colorDefault and if all colors are set to default then control uses SYSTEM (Windows) look

clrSelText, clrSelBack, clrSelBorder - define colors in selected state
clrHoverText, clrHoverBack, clrHoverBorder - define colors in hover (mouse over) state
clrDisText, clrDisBack, clrDisBorder - define colors in disabled state

Please note that currently only buttons support custom colors and custom border
As for v6.21 Edit fields always use system look
AFL: GuiSetText( "text", id ) - set text of the control
AFL: RequestMouseMoveRefresh() - request formula execution / refresh when mouse is moved INSIDE given chart pane (so it only triggers for ONE window under the cursor)
This provides less resource consuming way to handle chart graphics that depends on mouse hovering over chart pane than using RequestTimedRefresh as it only triggers one window currently under the cursor and only does not trigger refreshes when mouse does not move
NOTE2: mouse move refreshes come "as fast as possible". if your code is fast you can get butter smooth animation (even 50fps)
Example:
Plot( C, "Price", colorDefault ); GfxCircle( GetCursorXPosition(1), GetCursorYPosition(1), 7 ); RequestMouseMoveRefresh();
If Quote.exe is missing and AmiBroker can't do auto-update of quotes, a detailed information is displayed of where it expects Quote.exe file to be present
Plugin loading changed: first AmiBroker attempts to load plugins for "Plugins" subfolder from where Broker.EXE file is located (new behavior) and if subfolder is NOT found, it then defaults to old behavior (using "Plugins" subfolder under current working

CHANGES FOR VERSION 6.20.1 (as compared to 6.20.0)

Batch: DataImportASCII command allows to automate imports via batch. The parameter is file name to be imported. The importer uses file extension to determine format file used, so if you are importing File.aqh then aqh.format definition file will be used
Default for time compression timestamping changed to recommended value, i.e. 'start time of interval'
GetExtraDataEx to support pad&align

struct ExtraData
{
int nStructSize;
int nArraySize;
int nPeriodicity;
DATE_TIME_INT *anTimestamps;
void* (*pfAlloc)(size_t nSize);
};
typedef Variant (* GetExtraDataPtr) ( LPCTSTR pszTicker, LPCTSTR pszName, int nArraySize, int nPeriodicity, void* (*pfAlloc)(size_t nSize) );

/////////////
PLUGINAPI AmiVar GetExtraDataEx( LPCTSTR pszTicker, LPCTSTR pszName, struct ExtraData *pData )
{
AmiVar var;

var.type = VAR_ARRAY;
var.array = (float *)pData->pfAlloc( pData->nArraySize * sizeof( float ) );

for( int i = 0; i < pData->nArraySize; i++ )
{
AmiDate dt;

dt.Date = pData->anTimestamps[ i ];

// this simple example produces DateNums synced with current selection
var.array[ i ] = (dt.PackDate.Year - 1900) * 10000 + dt.PackDate.Month * 100 + dt.PackDate.Day;
}

return var;
}

NOTE:
Contrary to legacy GetExtraData call which is always called only from UI thread, a new function - GetExtraDataEx can be called from both UI and worker (non-UI) threads

CHANGES FOR VERSION 6.20.0 (as compared to 6.19.0)

AFL: new function GetExtraDataForeign( "fieldname", "symbol") - the same as GetExtraData but works with user-specified ticker instead of current one
AFL: ShellExecute supports "runbatch" command. After running batch batch and analysis windows that were opened by batch are automatically closed. ShellExecute( "runbatch", "path_to_batch.abb", "" );
Batch: new command DataPluginCmd - calls data plugin DataPluginCmd function (if it is exported from your data DLL) - allows custom actions to be peformed by the plugin from the batch (like maintenance)

This function allows automation/batch support for any kind of user-provided features, such as maintenance, for example a batch could use
DataPluginCmd maintenance
to run internal database maintenance by the plugin. This functionality is likely to be used by data vendors such as Premium Data to provide maintenace runs automation.
Ask your vendor for more info on available data plugin commands.

PRELIMINARY INFORMATION SUBJECT TO CHANGE

To support this feature in your plugin you would need to export DataPluginCmd function

#define DPC_INVALID_COMMAND -1
#define DPC_NOT_IMPLEMENTED 0
#define DPC_SUCCESS 1
#define DPC_STARTED_IN_THREAD 2

struct CommandData
{
int nStructSize;
HWND hNotifyWnd;
LPCTSTR pszDatabasePath;
struct _Workspace *pWorkspace;
struct InfoSite *pInfoSite;
};

int DataPluginCmd( LPCTSTR pszCommand, struct CommandData *pCmdData )
{
if( strcmp( "mycommand", pszCommand ) == 0 )
{
// do something
return DPC_SUCCESS;
}
else
{
return DPC_ INVALID_COMMAND;
}
}

return values
DPC_INVALID_COMMAND = -1
The command passed is invalid / does not exist

DPC_NOT_IMPLEMENTED = 0
Plugin does NOT implement any commands (this is automatically set by AMiBroker prior to calling Notify())

DPC_SUCCESS = 1
Command completed successfully (command executed and completed)

DPC_STARTED_IN_THREAD = 2
(For future use - not implemented yet)
Command recognized but launched by the plugin in separate thread. Its completion will be signalised by sending proper finalize message .
When starting in separate thread you should NOT use pCmdData pointer after function returns as it is temporary and will be destroyed as soon DataPluginCmd returns.
Batch: new command ExecuteAndWait - allows to execute external program and wait for its completion (allows among other things launching AmiQuote download and waiting until it is complete)

Example:
Launches AmiQuote, loads "YourTickerList.tls", performs download and closes AmiQuote:
ExecuteAndWait amiquote\quote.exe YourTickerList.tls /download /close
New Analysis: changed forced refresh frequency of result list to every 250ms when analysis is in progress (since 6.16 when messaging system has changed it was refreshed "on idle")
New Analysis: when user specified symbol with NO quotes at all as a reference symbol AND used "last N days" range AND used Exploration then it would lead to crash. Protection implemented against this scenario.
OLE: AnalysisDoc.Export supports now extra (optional) parameter WhatToExport and it allows now to export not only result list but also walkforward tab Analysis.Export("file", 1 );

Export( Filepath, WhatToExport = 0 )
WhatToExport decides what data should be exported:
= 0 - exports result list (the default behavior when this parameter is not provided)
= 1 - exports walkforward tab
UI: In 64 bit version File Dialog was not resizable due to differences in Microsoft runtime. Now it is made resizable.

CHANGES FOR VERSION 6.19.0 (as compared to 6.18.0)

Batch Scheduler implemented (Tools->Scheduler) - integrated tool to schedule automated runs of your batches

Batch scheduler runs user-defined batches.
Check period is every 10 seconds, so if you schedule something for 12:14:47, it will actually run on 12:14:50.
If multiple tasks are scheduled on the same time they will be run in order of appearance in the Scheduler list.
Scheduled tasks are run sequentially and next one would not start if previous did not finish.
For this reason avoid batches that require user intervention such as use of "PAUSE" command.
Scheduled tasks are only started when UI is not in the modal state, i.e. UI is NOT waiting for user input (such as File open dialog, or any other modal input dialog).
Once modal dialog is closed, missed tasks will be run.
Scheduled tasks are only run when AmIbroker is running. AmiBroker does not create background / hidden processes.
Windows already have too many wasteful processes running all the time.
If you need 24/7 operation, just do not close AmiBroker.
If you close AmiBroker, it won't run any tasks until you start AmiBroker again.
Then all missed tasks will be run once and afterwards they will be run on normal schedule (if repeat option is used).
Batch: ExportWalkForward command added
Batch: Pause command added
AFL: GetOption supports all fields available in SetOption call
AFL: new function: AddMultiTextColumn - adds a text column to the exploration where text displayed is choosen based on array value

AddMultiTextColumn( ARRAY, "TextList", "Caption", format = 1.2, fgcolor = colorDefault, bkcolor = colorDefault, width = -1 )
ARRAY - parameter decides on bar-by-bar basis which item from TextList is choosen
TextList - newline-separated list of texts to be displayed depending on ARRAY value. Note: newline is a "\n" symbol

This work so, when ARRAY value is zero, then first item from TextList is choosen and displayed, when ARRAY value is 1 then second item is choosen and so on.

This allows outputting conditional text in the exploration output, like this:

Buy = Cross( MACD(), Signal() ); Sell = Cross( Signal(), MACD() ); Filter = 1; // all bars AddColumn( Buy, "Buy" ); AddColumn( Sell, "Sell" ); TextList = "No signal\nBuy\nSell\nBuy and Sell"; TextSelector = 1 * Buy + 2 * Sell; /* would give 0 if no signal, 1 if a buy, 2 if a sell, 3 if both buy and sell */ AddMultiTextColumn( TextSelector, TextList, "Which signal" );

Note this feature works only in new Analysis window.
AFL: new function: MxSum - calculates sum of all elements of matrix (grand sum)
AFL: StDev added support for variable period (faster and more accurate than formula-based solutions)
AFL: Title now accepts {{VOLUME}} and {{FULLNAME}} special tokens that get replaced by current volume and full name of the symbol. Example Title = "{{VOLUME}}";
AFL: updated text of Error 62 message to list newly supported sequence %s
AFL: variable period Sum() now returns NULL if range is greater than current bar index (previously returned partial sum)
Analysis: WalkForward settings including IS/OS dates are no longer global, they are now per-project and saved in APX file
ASCII importer: added $RAWCLOSE2AUX1 and $RAWCLOSE2AUX2 commands that allow to put raw close into aux1/aux2 fields when using ADJCLOSE in 'close' field
Changed wording to "Free upgrade period expired." (from "License expired")
Date/Time fields in XML files now use ISO format always (not regional format), for better file exchangability accross regions
Debugger: Watch window: added ability to display values of static variables in watch window - just append '$' (dollar) prefix before static variable name
Default report chart dimensions (new instals) increased to 800x480px
On HiDPI (>=150dpi) screens icons in menus were small, now they are bigger
On HiDPI screens XYCharts and MonteCarlo charts could have axis labels partially truncated depending on choosen font size. Now it is fixed.
UI: Performance Monitor shows now the number of static variables used and the amount of memory consumed by them (Tools->Performance Monitor)
UI: Plugin data access time is now displayed with microsecond precision
UI: Symbol and interval combo boxes in toolbar are made larger on HiDPI screens

CHANGES FOR VERSION 6.18.0 (as compared to 6.17.0)

AFL: GetFnData/GetFnDataForeign added support for "PointValue" and "FullName" fields
Batch processor: In 6.17.0 Export to file command was executed properly but never marked as completed. Fixed.
Batch window checks if there is any other batch running and refuses to start when the other batch has not finished.
Batch: Added command line parameter to exit AmiBroker after running batch file (/exit)
Batch: Added command line parameter to run batch files: /runbatch "full path to batch file

Example 1:
broker.exe /runbatch "C:\yourbatch.abb"
Example 2:
run batch and exit program when batch is finished
broker.exe /runbatch "C:\yourbatch.abb" /exit

Example 3:
load database from specified path, run batch and exit
broker.exe /database "C:\program files\amibroker\mydatabase" /runbatch "C:\yourbatch.abb" /exit
Batch: Load Database "path to workspace/database" - warning this function may be RISKY because it may interfere with other running operations, use it with care
Batch: new command: Save Database
Batch: new command: Set log filename "filename"
Batch: new command: Write text to log "text"
OLE: added new method to AnalysisDoc object: Abort() - will abort any running Analysis scan/exploration/backtest
UI: File->Database Setings displayed underestimated memory usage per symbol (32 bytes per quote instead of 40). Corrected.

CHANGES FOR VERSION 6.17.0 (as compared to 6.16.0)

AFL: Changed default number formatting string from "%g" to "%.7g" (so 7 significant digits are now displayed instead of 6)
AFL: new function GetFnDataForeign( "field", "symbol" ) - the same as GetFnData but retrieves non-current symbol's data
AFL: new function InternetClose( handle )
AFL: new function InternetOpenURL( "url" )
AFL: new function InternetReadString( handle ) - read a string (line) from internet resource

NOTE:
If End-Of-File has been reached, the function returns empty string ("")
If End-of-File has NOT been reached, the function always returns non-empty string because each line read by this function ends with new line character "\n",
so if server has sent empty line it will be read as "\n"
You can trim new line characters using StrTrim
Internet* functions open wide area of applications including:
1. querying web APIs for extra data
2. using web/rest APIs for communication ( sending messages/alerts to Twitter, SMS gateways, etc)

Example:

ih = InternetOpenURL( "https://www.quandl.com/api/v3/datasets/SEC/AAPL_SALESREVENUENET_Q.csv?api_key=" ); printf( "AAPL Revenue:\n" ); if( ih ) { while( ( str = InternetReadString( ih ) ) != "" ) { printf( "%s", str ); } InternetClose( ih ); }
AFL: printf/StrFormat/TRACEF support now "%s" (string specifier) and accept string arguments passed and made faster too
Data: Gics.txt classification updated (thanks to PremiumData)
New Batch processor - allows to define sequences of scans/explorations/backtests/optimizations using different project files that are then run automatically. Detailed documentation on Batch window can be found here http://www.amibroker.com/guide/h_batch.html
OLE Automation: individual backtest is now supported via OLE automation
OLE: Interval property of Document object is now writable so you can set chart interval from OLE
AB = new ActiveXObject("Broker.Application");
doc = AB.ActiveDocument;
doc.Interval = 60; // interval is given in SECONDS (60 second is 1-minute interval)
Startup is made faster
UI: AFL Editor MDI UI did not get immediate refresh after file name change when main window was in modal state due to the way how MFC works. Fixed.
UI: File->Database Settings, default maximum "number of bars" increased to 1 million
UI: New Analysis Settings submenu is now duplicated in main window Analysis->Options menu for easier access for beginners
Watch window: added support for modulo (%) operator in watches

CHANGES FOR VERSION 6.16.0 (as compared to 6.15.0)

New Analysis: implemented entirely new inter-thread communication method that does not strain main thread message queue. This gives tremendous improvement in responsivity of UI when Analysis is running.

New Analysis: removed forced message pumping when AFL finished as it was causing issues with proper MDI tab refreshes in Windows 10 while Analysis was running
New Analysis: UI: added an option to keep using existing AFL file on opening APX project instead of asking the user what to do when differences are found between AFL file and content of APX project.
AFL: changed the way how custom-backtest reports "stocknum". Previously Status("stocknum") was equal to zero on custom backtest phase and this may have caused parts that use if(Status("stocknum")==0) to be excecuted during custom backtest phase. Now custom backtest run gives Status("stocknum") equal to -1 (minus one).
AFL: DateTimeConvert supports now more formats, format = 6 - day, 7 - month, 8 - year, 9 - day of week, 10 - day of year, 11 - quarter (1..4)
Charts: as apparently single pixel geometric pens are 8 times slower than DC pen, the optimization has been implemented that uses DC single pixel pen instead of geometric pen when bar width is 1, giving 8x faster 1-pixel bar charts
Since 6.15 when $AUTOADD was set to 0 (zero), then symbols not existing in the database but present in the imported file were not logged into import.log as earlier. Fixed.
UI: when AM/PM (12 hour format) was used in list views 12:00AM was interpreted as 12:00 (noon), instead of 00:00 (midnight). Fixed.
When backtesting Short only strategy and using backtestRegular mode and using HoldMinBars > 1, a disabled stop could trigger if it was enabled in previous backtest run. Fixed.
Support for Windows 98 and Millenium is dropped. If anybody needs that back please let us know (email to support)!

CHANGES FOR VERSION 6.15.0 (as compared to 6.14.0)

AFL: DateTimeFormat( "formatstr", datetime ) - converts datetime to string according to user-specified format
formatstr argument contains formatting string that specifies how date time should be converted to string.
For example to get full week day name of date time use
DateTimeFormat( "%A", dt );

To get YYYYMMDD without separtors use:

DateTimeFormat("%Y%m%d", dt );

Available formatting sequences are exactly like in strftime() C-runtime functionstrftime :

%a

Abbreviated weekday name

%A

Full weekday name

%b

Abbreviated month name

%B

Full month name

%c

Date and time representation appropriate for locale

%d

Day of month as decimal number (01 – 31)

%H

Hour in 24-hour format (00 – 23)

%I

Hour in 12-hour format (01 – 12)

%j

Day of year as decimal number (001 – 366)

%m

Month as decimal number (01 – 12)

%M

Minute as decimal number (00 – 59)

%p

Current locale’s A.M./P.M. indicator for 12-hour clock

%S

Second as decimal number (00 – 59)

%U

Week of year as decimal number, with Sunday as first day of week (00 – 53)

%w

Weekday as decimal number (0 – 6; Sunday is 0)

%W

Week of year as decimal number, with Monday as first day of week (00 – 53)

%x

Date representation for current locale

%X

Time representation for current locale

%y

Year without century, as decimal number (00 – 99)

%Y

Year with century, as decimal number

%z, %Z

Time-zone name or abbreviation; no characters if time zone is unknown

%%

Percent sign

Extra # flag may prefix any formatting code. In that case, the meaning of the format code is changed as follows.

Format Code Meaning
%#a, %#A, %#b, %#B, %#p, %#X, %#z, %#Z, %#% # flag is ignored.
%#c Long date and time representation, appropriate for current locale. For example: “Tuesday, March 14, 1995, 12:41:29”.
%#x Long date representation, appropriate to current locale. For example: “Tuesday, March 14, 1995”.
%#d, %#H, %#I, %#j, %#m, %#M, %#S, %#U, %#w, %#W, %#y, %#Y Remove leading zeros (if any).
AFL: new function Kurtosis( ARRAY, range, population = True )

Kurtosis( ARRAY, range, False ) - works the same as Excel's KURT function
Kurtosis( ARRAY, range, True ) - gives population Kurtosis (Excel does not have equivalent KURT.P function yet)
Note that these functions calculate excess kurtosis, so for normal distribution it is 0.

There is some controversy about what kurtosis really tells about distribution.

Most sources say that
The kurtosis of a data set provides a measure of the peakedness of the distribution of the data, relative to the normal distribution.
A positive kurtosis value indicates a relatively peaked distribution and a negative kurtosis value indicates a relatively flat distribution.

but Dr. Peter Westfall published an article that addresses why kurtosis does not measure peakedness
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4321753/

He says that "The kurtosis [...] is a measure of the combined weight of the tails relative to the rest of the distribution."
AFL: new function Skewness( ARRAY, range, population = True )

Skewness( ARRAY, range, False ) - works the same as Excel's SKEW function
Skewness( ARRAY, range, True ) - works the same as Excel's SKEW.P function
The Skewness of a data set is a measurement of the asymmetry of the distribution about the mean.

A Skewness of zero indicates perfect symmetry;
A positive Skewness indicates that more values lie below the mean and the distribution has a 'tail' which extends towards the higher values;
A negative Skewness indicates that more values lie above the mean and the distribution has a 'tail' which extends towards the lower values.
AFL: new modes added to DateTimeToStr() that use ISO regardless of regional settings mode = 3 (iso date and time YYYY-MM-DD HH:MM:SS) HH:MM:SS part is only included for non-EOD records, 4 (iso date only YYYY-MM-DD), 5 (iso time only HH:MM:SS)
AFL: NumToStr could crash if format parameter was greater than 127. Fixed. Now an error message is displayed when format parameter is too large
AFL: NumToStr now supports formatDateTimeISO
AFL: StDev function added 3rd argument "Population = True", when Population is True it calculates population based stdev, otherwise sample based

StDev( Array, range, False ) - works the same as Excel's STDEV
StDev( Array, range, True ) - works the same as Excel's STDEV.P
ASCII import: from version 6.11 importer always added new symbols even if $AUTOADD 0 was used. Fixed.
UI: Charts window - an attempt to rename a file or directory to something that already exists is now prevented and results in error message box.
UI: in 6.14 when New Analysis was switched to 'floating' mode, it could crash on attempt to run analysis. Fixed.
UI: Quote editor - in single-symbol mode "ticker" field sometimes was not updated. Fixed.
UI: Symbol->Quick Find menu command brings focus to Symbol's window search box. New installations use F3 key assignment for Quick Find. Old installations use old assignment (you can change F3 assignment in Tools->Customize->Keyboard)

CHANGES FOR VERSION 6.14.0 (as compared to 6.13.0)

AFL: ParamDate() added support for format=2 to return datetime instead of datenum/string
AFL: PercentRank function now accepts variable period (range)
AFL: PriceVolDistribution crashed if startbar argument was negative. Fixed by implementing protection against negative bar indexes.
AFL: PriceVolDistribution sometimes produced some random values in 6.13. Fixed.
ASCII importer now supports microsecond resolution timestamps (HH:MM:SS.mmmuuu) where mmm - milliseconds 000..999, uuu - microseconds 000..999
New Analysis: new feature a PAUSE button to temporarily pause/resume any running analysis. Note that already running threads are not interrupted, they are allowed to complete gracefully and then pause state is entered.
UI: A warning message is displayed when user attempts to close AmiBroker while Analysis is in progress
UI: QuoteEditor in some cases did not properly round fractional part of millisecond down to microsecond. Fixed
UI: QuoteEditor: Edit fields for OHLC prices, Volume, OpenInt and Aux now check for proper entry as you type and display red background if entered string is not proper numer. Also those edit fields don't accept characters other than digits (0..9), decimal
UI: Toolbar icons are set to "Large icons" mode automatically on HighDPI screens
When broker.workspace file was corrupted or truncated, the file remained open which eventually prevented from writing it on close. Fixed.

CHANGES FOR VERSION 6.13.0 (as compared to 6.12.0)

AFL Editor: calling SetForeign thousands of times followed by RestorePriceArrays() could cause exception during code verify when number of symbols exceeded cache size. Fixed.
AFL Editor: changes made in 6.11 to the way how automatic names for new formulas are assigned have been removed and replaced by new method that is faster and more reliable.
AFL Editor: if clipboard is locked by another application the editor would retry opening clipboard upto 8 times before giving up
AFL Editor: when formula was open cursor was located at the end. Now it is located at the top.
AFL: GfxSetCoordsMode( mode ) accepts now four different modes
mode parameter now accepts values 0, 1, 2, 3 with the following meaning:
0 - X and Y coordinates are expressed in screen pixels
1 - X coordinate is bar index, Y coordinate is price
2 - X coordinate is pixel, Y coordinate is price
3 - X coordinate is bar index, Y is pixel
AFL: MA function made upto 2 times faster, StDev function made 20% faster, Correlation made 40% faster
AFL: NormDist( x, mean = 0, sigma = 1, cumulative = True ) function. Implements hi-precision algorithm.

The function uses hi-precision algorithm that gives accurate results even for extreme left and right tails (<-5 and >+5)
The results are compatible with Excel 2003 and later which introduced higher precision NORMDIST than previous versions (Excel 2002 and earlier).

x = 19;
m = 2;
s = 9;

printf("PDF %g CDF %g", NormDist( x, m, s, False ), NormDist( x, m, s, True ) );

x = -7;
m = 0;
s = 1;

printf("PDF %g CDF %g", NormDist( x, m, s, False ), NormDist( x, m, s, True ) );
AFL: PriceVolDistribution( priceH, priceL, vol, bins, absolute = False, startbar = 0, endbar = -1 )

// a demo showing
// re-implementation of VAP overlay using
// PriceVolDistribution and low-level graphics
bi = BarIndex();
fvb = FirstVisibleValue( bi );
lvb = LastVisibleValue( bi );
mx = PriceVolDistribution( H, L, V, 100, False, fvb, lvb );

GfxSetCoordsMode( 1 );

GfxSelectPen( colorRed );

bins = MxGetSize( mx, 0 );
for( i = 0; i < bins; i++ )
{
price = mx[ i ][ 0 ]; // price level
relvolume = mx[ i ][ 1 ]; // relative volume 0..1
relbar = relvolume * (lvb-fvb+1);
GfxMoveTo( fvb, price );
GfxLineTo( fvb + relbar, price );
}

Plot( C, "Price", colorDefault, styleBar );

if( ParamToggle("BuildinVAP", "No|Yes") ) PlotVAPOverlay( 100, 100, colorGreen, 2 );
AFL: 64-bit version AFL Correlation() produced slightly different values (+/-0.00001 typ) than 32-bit version due to compiler differencies. Now 64-bit version produces same values as produced by all 32-bit versions.
Charting: new feature - Snap to Tick grid. Snap drawing tool end points to TickSize-spaced grid (if TickSize > 0 for given symbol)
Plugin loading routine displays a message box when plugins with incorrect bitness are found
Plugin loading routine writes detailed error message to the broker.log in case of problem of DLL loading (must enable plugin log to use this feature)
To enable plugin loading messages you need to create the following key in the registry:
HKEY_CURRENT_USER\Software\TJP\Broker\Diagnostics
and add
Flags
(DWORD 32bit) key with value = 5
Example error codes:
Loading 'AmiBroker\Plugins\FT.dll' - failed. Error code: 126: The specified module could not be found.. (0.63 ms)
- this means that the FT.DLL could not be loaded because it depends on other DLL that is missing (or not found in search path)

Loading 'AmiBroker\Plugins\TC2K.dll' - failed. Error code: 1114: A dynamic link library (DLL) initialization routine failed.. (0.23 ms)
- this means that TC2K.DLL was loaded fine but its InitInstance function exited with error code. In that case it was because Telechart was not installed and/or its OLE server not registerd

Loading 'F:\AmiBroker\Plugins\Sample.dll' - failed. Error code: 193: Not a valid 32-bit DLL. (0.14 ms)
- this means that you attempted to use 64-bit DLL with 32-bit application (not supported by OS)
When drawn study is being modified, Y distance shown in the status bar accounts for activated snap-to-price and/or snap-to-tick mode now.

CHANGES FOR VERSION 6.12.0 (as compared to 6.11.0)

AFL: new function GfxDrawImage( "filename", x, y )

Notes:
The function currently supports BMP and PNG files.
Per-pixel transparency (alpha channel) is supported ONLY for 32-bit PNG files.
PNG files with 32-bit depth are rendered with AlphaBlend which is not be available on oldest systems (Win95).
BMP files PNG files of lower depths are rendered without transparency using BitBlt (fast and always available)
Loading and drawing BMP files is much faster than PNG (as much as 10 times faster), approx load and rendering time is 0.3 ms for BMP, 3 ms for PNG (alphablended).
Timings that you get from Code check and profile are misleading for Gfx functions because they don't include actual on-screen rendering.

GfxDrawImage( "wizard.bmp", 100, 0 ); // bitmap - fast
GfxDrawImage( "logo.png", 30, 30 ); // png - supports per-pixel alpha channel / transparency
AFL: new function ProdSince( condition, array ) - cumulative product of array elements since condition is met
On bar when condition is met, initial product value is 1.
AFL: new function Prod( array, range ) - cumulative product of array elements over specified number of bars (range)
Note: when range is less or equal zero, product is equal 1.
AFL: new function CumProd( factor ) - cumulative product of array elements
y = CumProd( 1.05 ); // 1% per-bar growth
Plot( y, "exponential growth", colorRed );
AFL: new function VoiceCount( ) - returns number of available SAPI (Speech API) voices - to be used with Say() command
AFL: new function VoiceSelect( num ) - select SAPI (Speech API) voice to be used with Say() function, num is a numerical index of installed voices. By default Windows comes with just one voice, but one can add countless 3rd party voices
AFL: StaticVarAdd with non-array input produced incorrect results. Fixed.
UI: Symbols with COMMA (,) caused problems with multiple-selection operations. Now it is handled properly.
UI: Symbol Information - date fields (like last split date, div date or delisting date) can now be cleared (select all and press DELETE) to set Empty/Null date
UI: Realtime quote window: a RMB context menu items are grayed when local data is used and an empty message is set to inform the user that he/she needs realtime data source to use this window
UI: Quote Editor allows now immediate search for matching date - just type digits in format YYYYMMDD and list will automatically scroll and mark to quote that most closely matches entered date
UI: New Analysis: Alt+Enter shortcut added to bring up settings window

CHANGES FOR VERSION 6.11.0 (as compared to 6.10.0)

AFL: added formatDateTimeISO for ISO formatting regardless of locale settings, example:
Filter = 1; AddColumn( DateTime(), "DT ISO", formatDateTimeISO ); // generate a date/time column that is always in ISO format regardless of regional settings in Windows
AFL: MxFromString was slow on very large matrices (>100000 cells) due to poor performance of strtod function from Microsoft C runtime. Now MxFromString does not use it and is even 1000 times faster on 100K+ cell matrices (5ms vs 5second)
ASCII importer can now be even 20 times faster when importing NEW (non existing) data that were oddly sorted (like for example in reverse order - descending dates instead of ascending).
ASCII importer is now twice as fast when updating already existing quotes thanks to using in-house code instead of msvcrt functions.
Charting: Fibonacci maximum user-definable level increased to 9000% (from 1000%)
Idle processing is forced now every 125 ms (instead of 250ms) in Analysis window to update UI components more frequently under heavy CPU load
Ruin stop is identified by Short(ruin) / Sell(ruin) instead of Short(6) / Sell(6)
Startup splash screen is displayed a little sooner now and some pre-loading of editor components is done at start to save time to open editor later
When there were thousands of files in "Formulas" folder opening editor for the first time could take some time. Now this time is significantly reduced.

CHANGES FOR VERSION 6.10.0 (as compared to 6.09.0)

SetOption new fields for Monte Carlo
MCUseEquityChanges - use equity changes instead of trade list
MCChartEquityScale - 1 for log scale, 0 for linear scale
MCLogScaleFinalEquity - 1 for log scale, 0 for linear scale
MCLogScaleDrawdown - 1 for log scale, 0 for linear scale
MCNegativeDrawdown - 1 - use negative numbers for drawdown (reverse drawdown CDF)
QuickData cache was not flushed when double clicking on Analysis result list to display chart. Fixed.
MonteCarlo: added an option to use negative number for drawdowns (on by default). This reverses the ordering of "drawdown" column in the MC table and reverses the meaning (i.e. 10% percentile value means that there is 10% chance of drawdowns being equal or worse (more negative) than presented value). Wwith this option turned off (as in old versions), drawdowns are reported as numbers greater than zero and 10% percentile value means 10% chance of drawdowns being equal or better (smaller) than presented amount.
AFL: Gfx: low-level graphic recorded on layer 128 was played prematurely. Fixed.
Added error message when user attempts to write value to BarCount (read-only symbol)
More documentation updates

CHANGES FOR VERSION 6.09.0 (as compared to 6.08.0)

AFL Editor: an error message box displayed when @link file was not found caused main frame to get focus. Fixed.
AFL Editor: auto-complete and parameter tooltips poped up when adding/editing Doxygen/JavaDoc comment sections. Fixed.
AFL: new function fgetcwd - get current working directory
Analysis: Monte Carlo - semi logarithmic scale can be now used for Equity, Final Equity and $ Drawdown distribution charts (see Settings)
Analysis: Monte Carlo simulation has now a few mode "Simulate usign equity changes". This uses bar-per-bar percent portfolio equity changes to generate permutations instead of trade list.
Docs: updated help files
UI: Enlarged crash recovery window because people send us screenshots instead of clicking "Send report" button. Please click "SEND REPORT" instead of sending screenshots. Screenshots unfortunatelly do not contain all information, so now at least some more
UI: On Windows Vista and higher all tree views now use double buffering to avoid flicker
UI: XY charts and Monte Carlo charts axes use M suffix for numbers bigger than one million

CHANGES FOR VERSION 6.08.0 (as compared to 6.07.0)

AFL Editor: Implemented clickable JavaDoc/Doxygen-style links in doc comments
To use links in comments you have to put @link command followed by path to file or URL inside JavaDoc/Doxygen style comment:
a) multiline comment that begins with
/**
@link readme.html
@link http://www.amibroker.com
*/
(note double asterisk after initial slash)
b) single line comment that begins with triple slash
/// @link readme.html
/// @link c:\program files\amibroker\readme.html
/// @link http://www.amibroker.com
Now when you hover the mouse over @link command you will see the underline that indicates it is clickable.
It reacts to DOUBLE CLICK (not single click). When you double click it linked document will be open

@link command can open web pages, local files (both relative and absolute paths are supported) with Windows-registered program
to open given file type. So if you use
/// @link something.doc

then MS word would be used.

/// @link test.xls

would open test.xls in Excel.

Relative paths refer to AmiBroker working directory.
Html files are open with default browser, txt files are usually open with Notepad (or whatever application you use).

If file does not exist then you will get an error message.
AFL: Unary minus and NOT operator could cause crash when applied to result of undefined function or variable of non-numeric type. Fixed.
64-bit stack walker does not use Microsoft symbol server anymore so it can init a lot faster. Also initialization of stack walker is moved to startup sequence because doing it after exception is risky and unreliable
64-bit: access violations during Analysis run do not result in 'application not responding' freeze. Instead bug report is displayed with proper call stack.
After change in 6.02 exception dialog displayed first error in the formula even if exception was really caused not by first but last error. Fixed.
Exception info could get mixed up when multiple threads generated them at the same time. Fixed.
New Analysis: Auto-size column functionality re-displayed hidden columns. Fixed.
UI: AmiBroker now prevents piling on "Bug recovery" dialogs when multiple exceptions are thrown from multiple threads. First dialog is displayed, other exceptions are logged into DebugView as long as "Bug recovery" is not dismissed.
"Rename" and backup functions in several places could fail if new file name already existed. Fixed.
Support for Windows 95 is dropped

CHANGES FOR VERSION 6.07.0 (as compared to 6.06.0)

AFL: compression for array Static variables implemented to save memory and file size: StaticVarSet has additional parameter that controls compression
compressMode parameter decides whenever given variable will be compressed or not.
By default only persistent static variables will be compressed (cmDefault).
You can turn it off completely compressionMode = cmNever, or turn it on for persitent and non-persistent variables using
compressionMode = cmAlways
Compression is done by removing repeated values from the sequence as repeated values
are restored when doing StaticVarGet.
Compression is NOT compatible with non-aligned mode of StaticVarGet.
If compressed array is retrieved by StaticVarGet with align=False, then repeated values found in original array would not be retrieved.

Turning compression on slows down StaticVarSet (as it needs to do some extra processing), but does not affect performance of other functions,
so StaticVarGet is equally fast with or without compression.
AFL: printf/StrFormat check for %s, %c, %d, %x, %i, %u, %x, %p sequences that are not supported now and prints Error 62 when they are found.
AFL: printf/StrFormat now implement a check for correct formatting string as sometimes users passed strings with % that is special marker for formatting string instead of %% to print actual percent sign

When check failes, "Error 61. The number of % formatting specifier(s) does not match the number of arguments passed." is displayed
AFL: Some variable period functions such as Ref/Sum/MA incorrectly accepted matrix as a 'period'. Fixed (proper error message is displayed now).
AFL: StaticVarGet/StaticVarSet functions now support matrices including persistency (so matrices can be written to disk and loaded back between AmiBroker runs)
AFL: VarSet/VarGet officially accept matrices (allow dynamic variables of matrix type). (FWIW they were accepted in previous versions but implementation was incomplete.)
Charting: Candlestick wicks thickness is now user definable as % of candle width with a max. pixel width (Tools->Preferences, "Bars and Candles" tab). Also by default wick thickness is now 25%/5px max instead of constant 1 pixel.
Charting: Cycles tool in weekly chart produced incorrect lines when it went past 2038. Fixed.
Charting: Horizontal line tool level is now displayed with number of decimals as defined in Preferences (Misc tab, "decimal places in chart titles/tools"). Note that this setting is used when you draw a new line or modify old.
Debugger: Added F5 key as keyboard shortcut for "Debug / Go"

CHANGES FOR VERSION 6.06.0 (as compared to 6.05.0)

AFL Editor: Bookmarks implemented (Ctrl+F2 - toggle bookmark, F2 - go to next bookmark, Shift+F2 - go to previous bookmark
AFL Editor: Find in Files - when file name contained braces () double click on it would not open it. Fixed.
AFL Editor: Line comment puts double // comments on lines that appear after empty line. Fixed. Now empty lines are left untouched.
AFL: extra parameter for DateTimeToStr function mode (mode = 0 - convert both date and time portion, 1 - only date, 2 - only time ) Note that mode 2 would give you empty string when applied on chart with daily or longer interval
AFL: new function GfxFillSolidRect( x1, y1, x2, y2, color ) - it is fastest method to fill solid rectangle with single color (faster than GfxRectangle)
pw = Status("pxwidth");
ph = Status("pxheight");
GfxFillSolidRect( 0, 0, pw, ph, colorBlack );
AFL: new function SumSince - a fast sum of array elements since condition was true, works like Cum( array ) - ValueWhen( condition, Cum( array ) ) or Sum( array, BarsSince( condition ), but much faster
Syntax: SumSince( condition, array )
AFL: Variable period Sum() performance improved significantly when period changes +/-1 on bar by bar basis
Categories dialog: added ability to re-arrange the order of markets/groups/sectors/industries and watch lists using "Move Up" / "Move down" buttons
This is non-trivial task as all symbols must be synchronized with the change as when the ordering of categories change then all symbols data must be re-indexed to reflect new order as symbols refer to oridinal position of category.
New Analysis: Added an option "Auto-size columns to fit content" - OFF by default. When turned on, column widths are adjusted to fit the content after analysis is complete. Note that this means that any widths specified in width parameter in AddColumn width will be ignored when this is turned ON.
New Analysis: when "Wait for backfill" was turned ON and some symbols in the "Apply to" list were wrong (non-existing) then Analysis attempted to run code for symbol without quotes causing trouble. Fixed.

CHANGES FOR VERSION 6.05.0 (as compared to 6.04.0)

AFL Editor Find in Files implemented - on the output list you can double click on line to open the file in the editor
AFL Editor/Debugger: Code Check and Profile stopped working when it was run after debugging session. Fixed.
AFL: Null is accepted by MxFromString now
AFL: performance of printf() for large volume output (>60000 characters) improved ~60 times.
Charts: reduced tearing when resizing the chart window
Debugger now can use either base time interval or current chart interval (Tools->Preferences, Debugger tab, "Bar interval" setting)
Debugger: implemented Output window (for printf() output during debugging)
Removed old-style legacy AFL editor from the code, removed "use new editor" checkbox from the preferences. A new editor is used always now.
UI: Unfold triangles in tree views and checkboxes in Layers list were hard to click on HighDPI screens because icons were too small. Fixed. Now larger icons (32x32) are used instead of small (16x16) on small tablets like 8'' Windows with righ resolution (such as 1920x1200) that have very high DPI (approx 200DPI).
Watch window: now expressions with 2D subscripts to access elements of matrix matrix[ x ][ y ] are supported

CHANGES FOR VERSION 6.04.0 (as compared to 6.03.0)

AFL Editor & Watch Window: the contents of matrices is now displayed in value tooltips and watch window
Debugger state (watch variables/expressions and breakpoint locations) is now saved between AFL editor sessions (formula-wise so each formula has its own "debug state"). The data are saved in XML file with .dbg extension
Debugger: MDI mode implemented. In 6.0.3 AFL Editor did not support 'MDI mode' (even crashed), now this functionality is back. Also Watch window is available in MDI mode and debugger is working in MDI mode too.
Preferences: added new page with Debugger settings.
The settings are as follows:
+ Limit BarCount to - defines maximum number of bars in arrays (BarCount) used during debugging
+ Auto-scroll to first changed item - when this is ON, the "Arrays" list in the Watch window is scrolled automatically to first array item that has changed (so you don't need to locate elementsm that changed manually)
+ Keep debugging state - when this is ON, AFL editor saves the debug state (breakpoints and watches) in the .dbg file along with the formula when closing the editor and restores the state when formula is reopened.
Preferences: 'Editor' tab moved so 'AFL', 'Editor', and 'Debugger' tabs are next to each other, also 'Alerts' and 'Currencies' tabs moved before 'Miscellaneous'
Watch window: a new tab "Arrays" shows exploration-like array output for detailed examination of array contents (first 20 arrays from watch window are reported)
Watch window: implemented array item change highlighting and auto-scrolling so first changed item is always visible in the 'Arrays' tab
Watch window: implemented expression evaluator, so you can not only display variables, but also expressions involving variables such as (high+low)/2 or individual array elements such as myvariable[ i ] where i is dynamic loop counter
Watch window: implemented value change highlighting: changed values are displayed with light yellow background, additionally numeric (scalar) values are displayed in green when they increased or red if they are decreased
Watch window: pressing DELETE key while editing variable name caused deletion of variable from watch. Fixed.
Watch window: variables can now be drag-dropped from AFL editor window

CHANGES FOR VERSION 6.03.0 (as compared to 6.02.0)

AFL Editor: Implemented brand new fully integrated Visual AFL Debugger
NOTES: this the work-in-progress more features will be added in later betas
Debugger: Implemented breakpoints (including those set before compilation as well as adding/removing breakpoints during debugging)

To add/remove breakpoint use red circle toolbar button or press F9
Breakpoints can be added and removed at any time (during editing, when debugger is in 'running' state or stopped at breakpoint)
Breakpoints are implemented statement-wise (as single-stepping). Keep in mind that there can be only one breakpoint in any single line so if line has more than one statements
like this:
x=1;y=1;
the breakpoint will trigger before first statement in this line.
Breakpoints currently work with:
a) regular statements (that end with semicolon). For multi-line statements place breakpoint at the beginning line of the statement
b) for loops
c) while loops
d) do-while loops (you need to place breakpoint where 'while' clause is located, it won't break at the 'do' line as it essentially is no-op, if you want to break at the beginning
of do, just place breakpoint on first statement inside { block }
d) if statements
e) return statements
f) switch/case statements
g) break statements

Breakpoints that you place on other lines, won't trigger. The AFL editor won't allow to place breakpoint on empty line, or line that beginnins with // comment or sole brace
Debugger: Implemented single-stepping Step Into, Step Over

Single-stepping is done statement-wise. So it works on single statement at a time. So for example, empty lines are skipped and statements spanning multiple rows like below are treated as one step.
x = "test" +
" second row" +
" third row";

But if you put two statements in single line like this:
x = 1; y = 2;

Then this line would be treated as two steps (each expression x =1; and y=2; separately).

Keyboard shortcuts:
Step Over F10
Step Into F11
Debugger: Implemented variable value inspection tooltips (hover mouse over variable to see its value)
Debugger: Implemented Watch window with variable value display automatically updating when debugger single-steps or reaches breakpoint

To add variable to watch window simply double click on the list (at the end to add new variable).
You can also change variable name by double clicking on existing item
Renaming of PersistVars.temp to PersistVars.bin failed on some versions of OS. Fixed.
RT Quote window: drag-drop list view shows small arrow marker for the drop point now.
RT Quote window: when moving items using drag-drop, moved items image was flickering. Fixed
UI: Chart zoom via Ctrl+mouse wheel now works so it attempts to current mouse position as a "center" point of zoom when possible. (Previously it always worked so right border was the 'center').
AFL: Sum(array,N) outputs NULL values for indices starting from 0 upto index N-1 instead of N
When intraday data were used timestamp of 00:00:00 was not displayed in data tooltip (empty field was shown). Fixed.

CHANGES FOR VERSION 6.02.0 (as compared to 6.01.0)

AFL Editor: Implemented Line comment/uncomment feature (Edit->Line Comment, Ctrl+Q) to automatically add/remove // line comments from single or multiple lines. If multiple lines are selected, the content of the first selected line is deciding whenever block of lines is to be commented or uncommented
AFL: If any matrix cell has Null value then matrix product operator @ produces Null respective row/column of the result matrix.
AFL: if user called (a) GetPerfomanceCounter( 1 ) then (b) GetPerformanceCounter( 0 ) then subsequent call to GetPerformanceCounter(0) returned cumulated time not from call (a) but from system boot. Fixed.
AFL: matrix identifier can now be used in if-else statement. Such condition checks whenever very first element of matrix [0][0] is NOT NULL. This is useful for checking output of functions like MxInverse/MxSolve that would return NULL in all cells if matrix is singular
So
m = Matrix( 10, 10, 0 ); // do something with matrix if( m ) { // some code } is equivalent to if( NOT IsNull( m[ 0 ][ 0 ] ) ) { // some code }
AFL: MxSolve/MxInverse now return a matrix filled with Nulls as a result if source matrix can not be inverted and produce warning level 2 instead of an error.
AFL: On Windows Vista and higher static variables use slim read-write (SRW) lock instead of critical section. This gives 5% performance increase in multithreading scenarios.
AFL: StaticVarAdd( "name", value, keepAll = True, persistent = False ) - an atomic addition (interlocked read-add-write) operation for static variables

It is multithreading safe addition for static variables that are shared by multiple threads. This function is atomic with respect to calls to other static variable functions.
KeepAll flag when it is set to true emulates the behavior of AddToComposite. It keeps all values that are already present, so if data holes exists in current symbol,
the bars that are present in static variable but not present in current symbol remain untouched.
When KeepAll is set to false then only bars that are present in current symbol are kept. Any other bars that were present in static variable but not present in currently
processed symbols are removed. That is what normally happens with StaticVarSet().

In fact when KeepAll is set to False, StaticVarAdd can be seen as the following pseudo code:
EnterCriticalSection x = Nz( StaticVarGet( "name" ) ); // read exisiting value (and convert Nulls to zero) x += Nz( value ); // add value to existing StaticVarSet( "name", x ); // store updated value LeaveCriticalSection

The function can be used to create composites like this:

if( status("stocknum") == 0 ) { // remove any earier composite values StaticVarRemove("~Composite"); } StaticVarAdd( "~Composite", MACD() > Signal() ); Buy = 0;

NOTES:
1. StaticVarAdd automatically converts all Nulls to zeros (as AddToComposite does).
2. If you want to replace AddToComposite with StaticVarAdd, keep in mind that by default AddToComposite skips symbols in group 253. This is done so composite symbols
are not added to themselves. If you have composite symbols in your database and want to skip symbols in group 253 you can use
if( GroupID() != 253 ) StaticVarAdd("~Composite", values );
3. Thanks to extensive code tuning, StaticVarAdd generally offers better performance than AddToComposite which was already blazing fast. Single threaded StaticVarAdd may be twice as fast as ATC. With 8 threads running StaticVarAdd may be 4x as fast (it does not scale as much as naive person may think, because critical section limits performance due to lock contention). To illustrate the amount of fine tuning applied it can be said that first 'straightforward' version of StaticVarAdd was actually 20 times slower than ATC.
4. Be careful when using "quickafl" as StaticVarAdd would not increase 'required bars' (as ATC does), so if you want to actually add all bars and quick afl is turned on in analysis, it is better to add SetBarsRequired(sbrAll, sbrAll)
AFL: Study() returned NULL array when line's start date was greater than end date. Fixed (now it works for lines drawn from right to left too).
Docs: Example polynomial fit formula shows how to gracefully handle singular matrix and overflow/not-a-numbers in polynomial calcs

order = Param( "n-th Order", 10, 1, 16, 1 ); length = 60; lvb = BarCount - 1; fvb = lvb - length; yy = Matrix( length + 1, 1, 0 ); xx = Matrix( length + 1, order + 1, 1 ); yy = MxSetBlock( yy, 0, length, 0, 0, Ref( C, fvb ) ); x = BarIndex() - length/2; for( j = 1; j <= order; j++ ) { xx = MxSetBlock( xx, 0, length, j, j, x ^ j ); } xxt = MxTranspose( xx ); aa = MxSolve( xxt @ xx, xxt ) @ yy; //aa = MxInverse( xxt @ xx ) @ xxt @ yy; // alternative way if( aa ) // check if matrix is not null (so solution exists) { rr = Null; // store the fit in rr for( i = fvb; i <= lvb; i++ ) { rr[i] = aa[0][0]; for( j = 1; j <= order; j++ ) { rr[i] += aa[j][0] * x[ i - fvb ] ^ j; } } if( IsNan( rr[ fvb ] ) ) { // our polynomial yields infinite or not-a-number result due to overflow/underflow Title = "Polyfit failed. The order of polynomial is too High"; } else { SetChartOptions( 0, chartShowDates ); SetBarFillColor( IIf( C > O, ColorRGB( 0, 75, 0 ), IIf( C <= O, ColorRGB( 75, 0, 0 ), colorLightGrey ) ) ); Plot( rr, "rr", colorWhite, styleLine | styleThick); } } else { Title = "Matrix is singular. The order of polynomial is too high"; } Plot( C, "", IIf( C > O, ColorRGB( 0, 255, 0 ), IIf( C <= O, ColorRGB( 255, 0, 0 ), colorLightGrey ) ), styleDots | styleNoLine );
Persistent static variables are now saved to PersistVars.temp and once write is successful the file is renamed to PersistVars.bin. This is to prevent data loss when writing very large sets of persistent variables.
When more than one error is detected in single line of the formula then the first error message is displayed instead of last one in chart/commentary/analysis.

CHANGES FOR VERSION 6.01.0 (as compared to 6.00.0)

AFL: MxDet( mx, method = 0 ) - calculates determinant of the matrix
method = 0 - auto (use slow method for matrices of upto and including 5x5, fast for larger matrices)
method = 1 - slow (slow, more accurate)
method = 2 - fast (LU decomposition, less accurate )
"slow" method uses Laplace expansion
" fast" method uses LU decomposition
" Slow" method for small matrices (1x1, 2x2, 3x3, 4x4) is actually faster than "fast", equally fast for matrix 5x5 and
slower than "fast" method for matrices larger than 5x5

For this reason "auto" method uses "fast" LU method only for matrices larger than 5x5

LU decomposition is fast but subject to higher numerical errors. "Slow" method is slower yet produces much more reliable results.
For example Octave/MatLab that use LU decomposition would say that determinant of singular matrix like this
{ {16, 2, 3, 13}, { 5, 11, 10, 8}, {9, 7, 6, 12}, {4, 14, 15, 1 } }
is -1.4495e-012 due to roundoff errors of LU method.

If you want to calculate determinant using fast (LU decomposition) method, call MxDet with fast parameter set to 2.

CAVEAT: Laplace method has complexity of O(N!) and for this reason, even if you use method = 1, the maximum dimension for this method is limited to 10x10.
Matrices larger than that are always calculated using LU method
AFL: MxFromString() - creates a new matrix out of string in Mathematica/Wolfram list-style: "{ { 1, 2, 3 }, { 4, 5, 6 } }" or Matlab/Maple style "[ [ 1, 2, 3 ], [ 4, 5, 6 ] ]" or GNU Octave comma-semicolon style [ 1, 2, 3; 4, 5, 6 ]
AFL: MxGetBlock( matrix, startrow, endrow, startcol, endcol, asArray = False )

Retrieves items from rectangular submatrix (block) and returns either smaller matrix (when asArray is set to False)
or "normal" AFL array (when asArray is set to True). If array has different number of bars, unused elements are filled with Null.
z = Matrix( 2, 20, 0 );
// first row
z = MxSetBlock( z, 0, 0, 0, 19, Close );
// second row
z = MxSetBlock( z, 1, 1, 0, 19, RSI( 5 ) );
printf("Matrix z\n");
printf( MxToString( z ) );

x = MxGetBlock( z, 0, 1, 0, 19, True );

printf("Items are now in regular array (data series):\n" );
for( i = 0; i < 20; i++ )
printf( NumToStr( x[ i ] ) + "\n" );

z = MxGetBlock( z, 0, 1, 0, 1 ); // retrieve upper 2x2 submatrix
printf("Upper submatrix z\n");
printf( MxToString( z ) );
AFL: MxInverse( mx ) - calculates inverse of the matrix (see comments to MxSolve for more info)
AFL: MxSetBlock( matrix, startrow, endrow, startcol, endcol, values = 0 )
Sets values in the rectangular block of cells (rows in the range startrow..endrow and columns in the range startcol..endcol inclusive).
This allows to fill entire or partial rows, columns and all other kind of rectangular areas in the matrix with user specified data
Row and column numbers are zero based.
If values parameter is scalar, all cells in specified block are filled with that value.
If values parameter is an array, cells in the block are filled from left to right and from top to bottom with consecutive values taken from that array.
If there are more cells in the block than values in the array, the array item counter wraps around to zero and starts taking values from the beginning
Note: the function creates new matrix as a result (so source matrix is unaffected unless you do the assignment of the result back to the original variable)

Example 1:
// Create a matrix 6x6
// and fill 4x4 interior (except edges with consecutively increasing numbers)

y = Matrix( 6, 6, 0 );
y = MxSetBlock( y, 1, 4, 1, 4, Cum(1));
printf("Matrix y\n");
printf( MxToString( y ) );

Example 2:
// Create a matrix 2 rows x 20 columns and fill rows 0, 1 with first 20 values of Close and RSI(5) arrays respectively

z = Matrix( 2, 20, 0 );
// first row
z = MxSetBlock( z, 0, 0, 0, 19, Close );
// second row
z = MxSetBlock( z, 1, 1, 0, 19, RSI( 5 ) );
printf("Matrix z\n");
printf( MxToString( z ) );
AFL: MxSolve( A, B ) - solves linear equation system A@X = B

A needs to be square matrix NxN
B has to have N rows and at least one column (vertical vector).
Then calling
X = MxSolve( A, B ) would give vertical vector holding solution of the system of equations A @ X = B
B can also be a matrix,with each of its column representing different vector B. This way single call to MxSolve can solve several systems with same matrix A but different right hand vectors.
If B is a matrix NxM then MxSolve will produce result also having NxM cells with each column representing single solution.

Example 1:

A = MxFromString("[ 1, 1, 1, 1; 0, 2, 5, -1; 2, 5, -1, 1; 2, 2, 2, 1 ]");
B = MxFromString("[ 7; -5; 28; 13 ]" ); // single vertical vector B

printf( "Solving A * X = B\n" );
printf("Matrix A\n");
printf( MxToString( A ) );
printf("\nMatrix B\n");
printf( MxToString( B ) );

X = MxSolve( A, B );

printf("\nSolution X\n");

Example 2:

A = MxFromString("[ 1, 1, 1, 1; 0, 2, 5, -1; 2, 5, -1, 1; 2, 2, 2, 1 ]");
B = MxFromString("[ 7, 14 ; -5, -10; 28, 56; 13, 26 ]" ); // 2 right-hand side vertical vectors

printf( "Solving A * X = B\n" );
printf("Matrix A\n");
printf( MxToString( A ) );
printf("\nMatrix B\n");
printf( MxToString( B ) );

X = MxSolve( A, B );

printf("\nSolutions X\n");

printf( MxToString( X ) ); // two solutions

(Highly) Technical note about numerical precision:

Despite the fact that both MxSolve and MxInverse use double precision arithmetic solving/inverting matrices is subject to numerical precision of double IEEE
and for example zero result may come up as something like 1.4355e-16 (0.0000000000000001) due to the fact that double precision is still limited in accuracy (16 digits).

The result of
X = MxInverse( A ) @ B;
although mathematically the same as solving the system of equations, would yield slightly different result because if you do the inverse the returned matrix is converted back
to single precision and matrix product is performed with single precision. When you use MxSolve you are performing all calcs using 64-bit (double) precision and
only end result is converted back to single precision. So for example polynomial fit code works better with MxSolve than MxInverse

// Least Squares Polynomial Fit test order = Param( "n-th Order", 15, 1, 25, 1 ); length = 60; lvb = BarCount - 1; fvb = lvb - length; yy = Matrix( length + 1, 1, 0 ); xx = Matrix( length + 1, order + 1, 1 ); yy = MxSetBlock( yy, 0, length, 0, 0, Ref( C, fvb ) ); x = BarIndex() - length/2; for( j = 1; j <= order; j++ ) { xx = MxSetBlock( xx, 0, length, j, j, x ^ j ); } xxt = MxTranspose( xx ); aa = MxSolve( xxt @ xx, xxt ) @ yy; //aa = MxInverse( xxt @ xx ) @ xxt @ yy; // alternative way rr = Null; // store the fit in rr for( i = fvb; i <= lvb; i++ ) { rr[i] = aa[0][0]; for( j = 1; j <= order; j++ ) { rr[i] += aa[j][0] * x[ i - fvb ] ^ j; } } SetChartOptions( 0, chartShowDates ); SetBarFillColor( IIf( C > O, ColorRGB( 0, 75, 0 ), IIf( C <= O, ColorRGB( 75, 0, 0 ), colorLightGrey ) ) ); Plot( rr, "rr", colorWhite, styleLine | styleThick); Plot( C, "", IIf( C > O, ColorRGB( 0, 255, 0 ), IIf( C <= O, ColorRGB( 255, 0, 0 ), colorLightGrey ) ), styleDots | styleNoLine );
AFL: MxSort( mx, dim = -1, ascening = True ) - sorts the matrix

Sorts all items in a matrix
When dim == -1 (the default) it would sort:
a) a row if there is only one row (vector is horizontal)
b) a column if there is only one column (vector is vertical)
c) each column separately if there are more rows and columns than one (so we have actual 2D matrix).

When dim == 0 the function sorts the items in each row separately
When dim == 1 the function sorts the items in each column separately

// example
m = MxFromString("[ 9, 5, 6; 8, 7, 3 ]");

printf( MxToString( m ) + "\n\n" );

printf("%g, %g\n\n", MxGetSize( m, 0 ), MxGetSize( m, 1 ) );

m2 = MxSort( m, 0 ) ;

printf( MxToString( m2 ) + "\n\n" );

m3 = MxSort( m, 1 ) ;

printf( MxToString( m3 ) + "\n\n" );
AFL: MxSortRows( mx, ascending = True, col1 = 0, col2 = -1, col3 = -1 )

Sorts the rows of the matrix in ascending/descending order of the col1 column. When the col1 column has equal values, SortRows sorts according to the col2 and col3 columns in succession (if col2 and col3 are specified and >= 0 ).
Column numbers are zero based.
Hint: if you want to sort columns instead you can Transpose/Sort rows/Transpose back.

m = MxFromString("[ 9, 1, 6; 40, 30, 20; 8, 7, 3; 3, 5, 1 ]");

printf("Input matrix\n");

printf( MxToString( m ) + "\n\n" );

printf("Rows %g, Cols %g\n\n", MxGetSize( m, 0 ), MxGetSize( m, 1 ) );

printf("Sorting every row separately\n");
m2 = MxSort( m, 0 ) ;

printf( MxToString( m2 ) + "\n\n" );

printf("Sorting every column separately\n");
m3 = MxSort( m, 1 ) ;

printf( MxToString( m3 )+ "\n\n");

printf("Sorting rows by contents of first column\n");
m4 = MxSortRows( m, True, 0 ) ;

printf(MxToString( m4 )+ "\n\n");

printf("Sorting rows by contents of second column\n");
m5 = MxSortRows( m, True, 1 ) ;

printf(MxToString( m5 )+ "\n\n");
AFL: MxToString - creates string out of matrix variable in the Wolfram list style like this (for 3x3 matrix): { { x00, x01, x02 }, { x10, x11, x12 }, { x20, x21, x22 } }

CHANGES FOR VERSION 6.00.2 (as compared to 6.00.1)

AFL: An "Error 60: Requested matrix size is too large" message is displayed now when MxCreate is called with ( rows * cols ) > 532 million
Analysis: Optimizer allows larger search spaces when using non-exhaustive optimization without triggering Error 709
Charting: you can zoom out using Ctrl+ mouse wheel to the max (previously it zoomed out to 2000 bars only)
Splash screen is now centered on default monitor screen when main frame is maximized instead of using old co-ordinates.
Startup steps are logged into the broker.log to diagnose rare cases of slow startup and/or crash at startup
UI: Color picker controls were too small on HighDPI display. Fixed.
UI: New AFL Editor, Analysis pages now have Options page in Customize dialog allowing to turn on "Large icons" mode for HighDPI displays

CHANGES FOR VERSION 6.00.1 (as compared to 6.00.0)

A crash could occur if user formula had PlotShapes() with layer argument less than zero or greater than 255. Fixed (error 52 is displayed in such case)
AFL: MxTranspose could fail if rows > cols. Fixed.
Calculate composites could crash if database had incorrectly set up market ID for symbols. Fixed.
UI: a crash could occur if user attempted to open WebReseach with weblinks.cfg file missing or empty (could happen if setup program was not run). Fixed.
UI: Analysis: Progress bar disappeared when user switched from floating window to normal while analysis (like optimization) was in progress. Fixed.
UI: Analysis: when window was in floating mode it was possible to close running analysis window without warning. Fixed (now error message is displayed and floating window is not closed until you cancel pending analysis)
UI: Bug recovery window now properly reports Windows 8.1 and Windows 10 in version info
UI: Improved font scaling of new splash screen/about window on Windows 8 and above and screens high DPI screens (>=200)

CHANGES FOR VERSION 6.00.0 (as compared to 5.99.0)

AFL Editor: Preferences: the default value for "Auto-complete" changed to "Immediate"
AFL: MxGetSize( matrix, dim ) - get matrix size in given dimension
where
matrix argument is matrix to query for the sizes
dim argument is 0 or 1. 0 gets number of rows, 1 gets number of columns.
MxGetSize( matrix, 0 ) - gives number of rows
MxGetSize( matrix, 1 ) - gives number of columns
AFL: MxIdentity( size ) - creates an indentity matrix of defined size (square matrix with rows and columns equal to size argument filled with ones on the main diagonal and zeros elsewhere)
AFL: MxTranspose( matrix ) - creates transpose of an input matrix
AFL: Warning 506 is suppressed when formating is 1.0 (integer)

CHANGES FOR VERSION 5.99.0 (as compared to 5.98.0)

AFL: added support for matrices (2D tables of numbers).
Matrix support is preliminary and subject to change.
To create a matrix use
my_var_name = Matrix( rows, cols, initvalue)

To access matrix elements, use:
my_var_name[ row ][ col ]

where
row is a row index (0... number of rows-1)
and
col is a column index (0... number of columns-1)

Matrices and their elements support all scalar (element-wise) arithmetic and logical operations

So you can for example add, subtract, multiply, divide two matrices if they have same dimensions with one call.

x = Matrix( 5, 6, 9 ); // matrix 5 rows 6 columns, initial value 9
y = Matrix( 5, 6, 10 ); // matrix 5 rows 6 columns, initial value 10

z = y - z; // will give you matrix 5 rows and 6 columns filled with elements holding value 1 (difference between 10 and 9).

All those operations are performed ELEMENT-WISE.

You can also apply any arithmetic and logical operation on matrix AND scalar value. This would perform element-wise
operation on each element of source matrix and given scalar value.

m = Matrix( 10, 10, 0 ); // m will be 10x10 matrix filled with zeros
z = m; // z is now also a matrix

for( i = 0; i < 10; i++ )
{
z[ i ][ 4 ] = i; // fill z with some other values, note that m will remain unaffected.
}

for( i = 0; i < 10; i++ )
_TRACEF( "%g = %g, %g, %g\n", i, m[i][1], m[ i][4], z[ i][4]);

// scalar addition (element wise)
z += 3;
m += 5;

for( i = 0; i < 10; i++ )
_TRACEF( "%g = %g, %g, %g\n", i, m[i][1], m[ i][4], z[ i][4]);

Additionally there is a new operator @ that handles matrix product (matrix multiplication in the sense used in linear algebra). This operator requies
that number of columns in first array is the same as number of rows in second array.
AFL: new Error 59. Too many subscripts - displayed when user attempts to use 3 or more subscripts on matrix identifier
AFL: new function Matrix( rows, cols, init_value = 0 ) - creates 2 dimensional table with defined number of rows and column
AFL: new matrix product (multiplication) operator: @
a new operator @ that handles matrix product (matrix multiplication in the sense used in linear algebra). This operator requires
that number of columns in first array is the same as number of rows in second array.
A = Matrix( 1, 3 );
B = Matrix( 3, 2 );

// matrix A = [ 1, 4, 6 ]
// matrix B = [ 2, 3 ]
// [ 5, 8 ]
// [ 7, 9 ]

A[ 0 ][ 0 ] = 1; A[ 0 ][ 1 ] = 4; A[ 0 ][ 2 ] = 6;

B[ 0 ][ 0 ] = 2; B[ 0 ][ 1 ] = 3;
B[ 1 ][ 0 ] = 5; B[ 1 ][ 1 ] = 8;
B[ 2 ][ 0 ] = 7; B[ 2 ][ 1 ] = 9;

X = A @ B;

_TRACEF("%g %g", X[ 0 ][ 0 ], X[ 0 ][ 1 ] );
Charts: when chart is moved vertically by the user so it falls outside upper edge, the parts falling outside are not drawn as flat line anymore
New Analysis: Attempt to run Walk forward on periods without any data for any symbols could result in exception. Fixed.
New Analysis: Show current trade arrows did not show sell arrow after Individual backtest. Fixed.
UI: Color text output in the Interpretation window was sometimes incorrect when numbers followed immediately EncodeColor call. Fixed.
UI: Interval combo dropdown list adapts its width to higher DPI displays now
UI: Notepad is refreshed on sliding back from auto-hide
UI: Updating Symbol Information after ASCII import
Upgrade info: Free upgrade only for users who purchased license after May 31, 2013

CHANGES FOR VERSION 5.98.0 (as compared to 5.97.0)

Analysis: Monte Carlo CDF charts use denser X grid (5% stepping)
Analysis: Monte Carlo min/max/avg equity charts can now be displayed as percent change instead of absolute values
Analysis: Monte Carlo stats are now generated in out-of-sample Walk forward steps by default
Analysis: Walk forward Out-Of-Sample summary report includes Monte Carlo simulation from ALL trades of all Out-of-sample periods
Analysis: Walk forward: A crash could occur when Monte Carlo sim was enabled in walk-forward optimization. Fixed.
Analysis: Walk forward: Buy&Hold stats Max. sys drawdown was too large for 2nd and next steps of walk forward OOS. Fixed.

CHANGES FOR VERSION 5.97.0 (as compared to 5.96.0)

Analysis: Backtest report uses now client-side script pagination when trade list contains more than 1000 trades so it takes less time to display it (3s vs 15s for 30K trades). (Experimental, may be removed)
Analysis: MC: MC Min/Max/Strawbroom equit chart was getting slow when number of trades in backtest exceeded 1000. It draws faster now.
Analysis: Monte Carlo charts are now moved to Reports (so they appear in the REPORT as a separate page, not as tabs in Analysis) and generated in separate thread
Analysis: Monte Carlo: numerical values of distributions are now included in the Report / Monte Carlo page
HtmlView: new version 1.3, improved performance of Edit->Copy Table for large tables (>30K rows) by 2 orders of magnitude. Also added support for paginated tables.
In 5.9x single-symbol portfolio backtests were reported as "0-symbols" in Report Explorer. Fixed (fix applies to newly run backtests only)
OLE: added LoadWatchlists() method to Broker.Application object. It allows to re-load watchlist files for currently loaded database without re-loading entire database. (Just in case you ask for SaveWatchlists - watchlists are saved when you call SaveDatabase)
OLE: splash screen closes automatically after 1 second if program was launched from OLE, instead of being displayed as long as OLE object is active
UI: Added global Analysis->Report Explorer menu to access Report explorer without need to open Analysis window
UI: small tweaks and fixes to About/Splash screen.

CHANGES FOR VERSION 5.96.0 (as compared to 5.95.0)

AFL Editor: Verify Syntax uses raw symbol quotes, so it is faster and works regardless of "mixed data" setting
AFL Editor: Word wrap - wrapped lines uses same indent as previous line
AFL: added SetStopPrecedence function
AFL: ApplyStop() has 2 more parameters: ValidFrom/ValidTo - define starting and ending bar since entry when stop is active
// Applystop( type, mode, amount, exitatstop, volatile, reentrydelay, validfrom, validto )
ValidFrom - defines first bar since entry when stop can generate an exit. 0 means from the very beginning
ValidTo - defines last bar since entry when stop can generate an exit. -1 means "infinite".
By default stops are valid all the time (0/-1).

So now you can create stops that get actived/deactivated in different times.
This setting is independent for each stop type. It also works in conjunction with SetOption("HoldMinBars", x ).
HoldMinBars affects BOTH regular exits and stops, preventing ALL kind of exits during defined period.

ValidFrom/ValidTo works on each stop separately and does not affect regular exits.

For example always have a stopTypeLoss always in affect and only allow a trailing stop to become active after so many bars:

ApplyStop(stopTypeLoss, stopModePercent, 10, 1);
ApplyStop(stopTypeNBar, stopModeBars, 40, 1);
ApplyStop(stopTypeTrailing, stopModeRisk, 7, True, True, 0, 4 /* valid from 4th bar after entry */ );

This feature is extended implementation of FC item #514

IMPORTANT:
Precedence parameter introduced in 5.95 has been REMOVED.
That functionality has been replaced by new SetStopPrecedence function.
AFL: new function: _TRACEF() - printf-formatted trace
_TRACEF( "Close %g, Open %g", Open, Close );
AFL: Param() offers increased stepping precision for small fractional increments
Analysis: some newly introduced settings (MC mainly) were not saved in Analysis project. Now they are saved.
In 5.95.0 formulas 0, 1, -1, Null constants for Buy/Sell/Short/Cover assignments and using Equity() could crash. Fixed.
In 5.95.0 when ExitAtStop==1 for NBarStop was used it deactivated other stops in backtestRegular mode. Fixed.
In backtestRegular mode (old code path) when HoldMinBars was >=2 and exit was triggered on very first bar opening after hold period price was not adjusted to open as in other (new) backtest modes. Fixed.
Monte Carlo: MC can be now enabled in Optimization and Individual Backtest

To enable Monte Carlo simulation in each backtest of optimization process and each individual backtest you can use
SetOption( "MCEnable", 2 ); // value == 2 forces MC to be enabled everywhere (in every mode including optimization).
the old option:
SetOption("MCEnable", 1 ); // value == 1 enables MC only in portfolio backtests (default)

Note that enabling MC in optimization is highly discouraged unless you actually use MC metrics as optimization target via custom backtester
or otherwise use MC distributions in the optimization process.
Monte Carlo process is computationally costly and while few hundred milliseconds added to one backtest don't matter much,
in case of optimizations when these are multipled by number of steps you can easily increase optimization time by orders of magnitude.
So unless you REALLY need MC distribution as custom metric and optimization target, do NOT enable MC in optimization.
UI: added special "meaningful" message on attempt to open the .APX file that has invalid format
UI: Analysis settings are now made newbie-friendly - a new "SCENARIO" combo has been added that allows to choose from 4 preset scenarios

If user chooses preset scenario, the application sets properly the following fields
- trade prices & delays
- exitAtStop modes
- N-bar stop priority
- ActivateStopImmediately
and disables those preset controls from accidential change.

Using presets prevents beginners from using wrong settings.

It is still possible to override any setting from the formula level (so be careful what you write in your formula).

A default "CUSTOM" scenario works as in old versions -i.e. all fields are enabled for change but it is user responsibility
to set those fields properly. Flexibility comes at a cost - some combinations of settings that are not covered by preset scenarios
may make no sense and sometimes lead to wrong results. The user should consult the manual and/or ask support when in doubt.
UI: Analysis Settings: "Activate stops immediately" check box has been moved from "General" to "Stops" tab where it really belongs functionally
UI: new About dialog/startup splash screen (asynchronously showing app loading info)
UI: Parameter window: when parameter names are very long, value area is shrinked down to give more space for name, but not less than 160px/96DPI

CHANGES FOR VERSION 5.95.0 (as compared to 5.94.0)

AFL Editor: Pretiffy formatting fixes and improvements. Also editor attempts to keep unchanged scroll position after prettify.
AFL Editor: Prettify selection now removes extra padding around parenthesis and leaves only one space pad inside
AFL Editor: Word wrap implemented (View->Word Wrap menu)
AFL Engine: upsizing certain common scalar values (-1, 0, 1, Null) to array is much quicker thanks to caching
AFL: #pragma maxthreads N - where N is a natural number 1...<number of cores>. Allows to lower the number of parallel threads using in Analysis. For example to run in just one thread use #pragma maxthreads 1
Attention: lowering number of threads degrades performance
AFL: ApplyStop has new, 7th parameter: precedence that defines the order in which stops are triggered if they appear on the very same bar
Accepted values are 0, 1, 2, 3.
Stops are executed in increasing precedence order, so 0 is executed first, 1 - second, 2 - third, 3 - as the last.
Values outside 0..3 range are ignored.
Specifying -1 means "no change" - use default order.
Keep in mind that if you are changing ApplyStop order/precedence you
1. MUST DEFINE ALL APPLYSTOP even if you don't use all stop types. It you don't use given stop type use stopModeDisable in mode parameter
2. There must be NO DUPLICATE in precedence numbers. Otherwise unpredictable behavior may occur.
3. The order of events inside bar is unknown so specifying given order of execution of stops
is based on assumptions that may or may not be correct for given trading scenario. It is advised to keep max. loss stop as first one.
Whenever N-bar stop is executed first or not depends on your trading setup. If you trade on open, then Nbar stop may be executed first (even before max loss).
Trailing stop can be excuted before or after profit target depending on your setup. Contrary to "gut feeling" executing trailing stop before profit target is not necesarily more pessimistic, because
in several cases leads to increasing CAR instead of decreasing it. Now you can test both. Choose whatever fits your trading style. Choo

Example:
// Applystops will be excuted in the following order: loss, trailing, profit, n-bar:
ApplyStop( stopTypeLoss, stopModePercent, 5, True, False, 0, 0 /*precedence*/ );
ApplyStop( stopTypeTrailing, stopModePercent, 5, True, False, 0, 1 /*precedence*/ );
ApplyStop( stopTypeProfit, stopModePercent, 5, True, False, 0, 2 /*precedence*/ );
ApplyStop( stopTypeNBar, stopModeBars, 40, False, False, 0, 3 /*precedence*/ );

Note:
for backward compatibility:
With stopTypeNBar, when Precedence parameter is provided then ExitAtStop setting is ignored.
When Precedence parameter is not provided for stopTypeNBar
there are two possible sequences applied by default
if NBarHasPriority setting is true or you call ApplyStop with ExitAtStop set to true then sequence is N-bar, loss, profit, trailing
otherwise default sequence is loss, profit, trailing, N-bar
These defaults will be re-applied whenever you call ApplyStop( stopTypeNBar ... ) without providing precedence parameter.

Note 2:
Fixed ruin stop (99.6% loss) is always executed as last one.
AFL: Custom Backtest: Monte Carlo simulation results are now available in custom bactester (after backtest or PostProcess()).

per = Optimize( "period", 20, 2, 100, 1 );
Buy = Cross( C, MA( C, per ) );
Sell = Cross( MA( C, per ) , C );

SetOption("MCEnable", True );
SetOption("MCRuns", 1000 );
SetPositionSize( 1, spsShares );
SetCustomBacktestProc("");

if( Status("action") == actionPortfolio )
{
bo = GetBacktesterObject();

bo.Backtest(); // run default backtest procedure

// get access to Monte Carlo results
// note 1: it may be NULL if MC is NOT enabled
// note 2: MC results are available after Backtest() or PostProcess as MC simulation is done in final phase of post processing
mc = bo.GetMonteCarloSim();

if( mc )
{
// get 25-th percentile of final equity distribution
bo.AddCustomMetric("FinalEq25", mc.GetValue( "FinalEquity", 25 ) );
}

}
GetMonteCarloSim() to retrieve MC object to access distributions
MonteCarloSim object:
Methods:
GetValue("field", percentile)
AFL: MonteCarloSim GetValue( "field", percentile )

Available "field" values:
" FinalEquity"
" CAR"
" LowestEquity"
" MaxDrawdown"
" MaxPercDrawdown"
AFL: new function: IIR - general-purpose Infinite Impulse Response filter of order 1-4
IIR( input, b0 = 1, a1 = 0, b1 = 0, a2 = 0, b2 = 0, a3 = 0, b3 = 0, a4 = 0, b4 = 0 )
It implements fast 4th-order infinite impulse response filter.

Analytically it is:

y[ n ] = b0 * x[ n ] + b1 * x[ n - 1 ] + b2 * x[ n - 2 ] + b3 * x[ n - 3 ] + b4 * x[ n - 4 ]
+ a1 * y[ n - 1 ] + a2 * y[ n - 2 ] + a3 * y[ n - 4 ] + a4 * y[ n -4 ];

AFL equivalent:
y = x; // init so no glitches at the beginning appear
for( n = 4; n < BarCount; n++ )
{
y[ n ] = b0 * x[ n ] + b1 * x[ n - 1 ] + b2 * x[ n - 2 ] + b3 * x[ n - 3 ] + b4 * x[ n - 4 ]
+ a1 * y[ n - 1 ] + a2 * y[ n - 2 ] + a3 * y[ n - 4 ] + a4 * y[ n - 4 ];
}

Filters of orders 3 and 2 can be implemented by leaving unneeded arguments at default value of zero.

Coefficients b0, b1, b2, b3, b4 multiply the input signal x[n] and are referred to as the feedforward coefficients. Coefficients a1, a2, a3, a4 multiply the output signal y[n] and are referred to as the feedback coefficients. Pay careful attention to the sign of the feedback coefficients. Some design tools flip the sign of the feedback coefficients. In this case the feedback coefficients must be negated.

This convention is used so feedback coefficients work the same as in AMA2 in case of first order filter, so

IIR( array, factor, 1-factor )

is the same as

AMA2( array, factor, 1-factor )

(with very minor difference is that IIR uses internally double precision arithmetic while AMA2 uses single precision)

simple ema:
factor = 2/(period+1);
IIR( input, factor, 1- factor );

wilders:
factor = 1/period
IIR( input, factor, 1-factor );

Ehlers Supersmoother

Periods = 10; c1 = 1.41421 * 3.14159 / Periods; c2 = 2.71828^-c1; a1 = 2 * c2 * cos( c1 ); a2 = -c2^2; b0 = (1 - a1 - a2)/2; b1 = b0; x = IIR( Close, b0, a1, b1, a2 ); Plot( x, "Super Smoother", colorRed );
AFL: SetOption/GetOption new fields for MC Equity/Straw broom chart, "MCChartEquityCurves" (true/false), "MCStrawBroomLines" (0..100), MCPosSizePctEquity (0..100)
AFL: Status("ThreadID") - gets the current thread ID under which formula is executed
Analysis: MCS: new position sizing method: Percent of Equity
Backtest: fixed ruin stop (99.6% drawdown) in backtestModeRegular is executed last as in other modes now.
Memory usage was larger in 5.94 when lots of chart panes were open. Now it is back to previous levels.
MonteCarlo: Min/Max/Avg Equity + Straw broom chart implemented + Settings
UI: Enhanced Assignment Organizer: Faster operation, display FULL NAME alongside with symbol, sorting by column, alternate row background, proportional resizing of both left/right lists

CHANGES FOR VERSION 5.94.0 (as compared to 5.93.0)

Analysis: implemented Monte Carlo simulation (preliminary) produces CDF charts of MC Final Equity, MC CAR, MC Max Drawdown $ and %, Lowest Equity

This feature is preliminary and subject to change.
AmiBroker's built-in Monte Carlo simulator is high speed (30+ million trades per second) simulator that runs series of random trade sequences based on backtest output.
It uses high-quality Mersene Twister random number generator.

It is run automatically after backtest and produces a series of CDF charts (see extra tabs in the New Analysis window). These charts are probably going to be moved
to the report at later stage.
Monte Carlo simulator is by default available only during portfolio backtest runs. It is NOT available/running during optimization or individual optimization.
(I may enable it in the future).

You can control process of Monte Carlo simulation using new Settings page:

"Enable Monte Carlo Simulation" - turns on/off MC simulator

"Number of runs" - defines how many MC simulation runs is done (default 1000)

"Position sizing" - defines position sizing used by Monte Carlo simulator.
Position sizing algorithm used by MC process is independent from that used by backtest. To do so MC may apply special processing to trade list obtained from backtester depending on this option setting.
- "Don't change" - uses trades as they are coming from the backtester without changing position size and profit as it is reported from the backtester
- "Fixed size: N shares/contracts" - trade fixed number of shares/contracts. It takes per-share profit as reported by backtester and muliplies it by N contracts as entered in the settings. Per-share profit is calculated by dividing profit reported by the backtester by number of shares/contracts reported by the backtester
- "Constant value: X" - trades fixed amount per trade. Takes percent profit reported by backtester and multiplies it by constant value entered to get the profit.
AFL: SetOption/GetOption support new fields that control Monte Carlo simulation: "MCEnable" (true/false), "MCRuns" - default 1000, "MCPosSizeMethod" - 0 - don't change, 1 - fixed size, 2 - constant amount, "MCPosSizeShares" (number), "MCPosSizeValue" (number)
AFL: 32-bit round() is 7X faster and now works in "round half to even" (default IEEE mode) instead of half towards infinity. Hand written in assembly due to slowness of CRT
AFL: int() and frac() functions are 2X faster now
AFL: integer division operator \ (experimental)
AFL: StrMatch() - string pattern/wildcard matching
StrMatch( "sting", "searchsting");
returns TRUE or FALSE whenever string matches searchstring or not.

Searchstring is can contain wild-card characters such as:
* - matches any string, including empty strings
? - matches any single character

This function is case sensitive (of course except wildcard characters).
If you want case insensitive matching - convert both string and searchstring to lowercase or uppercase
prior to matching (StrLower/StrUpper)

Example:
x = StrMatch("Every breath you take", "Every * you *"); // x will be TRUE
x = StrMatch("Every step you make", "Every * you *"); // x will be TRUE
AFL: support for UCN (universal character numbers) \uXXXX where XXXX is hexadecimal character code. UCN output works in PlotText/PlotTextSetFont, GfxDrawText, GfxTextOut, Chart titles, Interpretation and Commentary windows. Requires Windows 2000 or higher

For example
heart "\u2764"
sun "\u2600"
star "\u2605"
EURO currency: "\u20ac"
Sigma (greek): "\u03a3"
alpha (greek): "\u03b1"
beta (greek): "\u03b2"
umbrella: "\u2602"
telephone: "\u260e"
hand pointing up "\u261D"
Tables of all UCN/Unicode characters
http://www.unicode.org
http://unicode-table.com/
http://www.unicodemap.org
http://en.wikipedia.org/wiki/List_of_Unicode_characters
Various arrows:
http://www.unicode.org/charts/PDF/U2190.pdf
Enclosed alphanumerics:
http://www.unicode.org/charts/PDF/U2460.pdf

(note: NOT all glyphs (graphical representations of characters) are actually present in current font. This depends on your operating system. For example Segoe UI in Windows 7 has lots of characters, but Windows 8 has more,
if a glyph is missing usually an empty rectangle is drawn). DejaVu free font has lots of glyphs, Symbola free font has lots of weird shapes.
Plot( C, "", colorDefault );
PlotTextSetFont( "\u2665\u2126\u2191\u21d1\u24ee\u261D", "Segoe UI", 30, 20, HighestVisibleValue( C )/2 + LowestVisibleValue( C )/2 , colorRed );
Title = "A demo of UCN: "+EncodeColor(colorRed)+"\u2665\u2126\u2191\u20ac\u03a3\u03b2\u2602\u260E";
UI: Charts: when creating a new chart window Interval Lock was often marked automatically. Now it is fixed (it is always OFF for new charts).
UI: XY-charts could enter infinite loop (hang) if ALL Y-coordintates were the same. Fixed.
UI: XYCharts tooltip display shows X/Y point data under the cursor as in old version but when it does not find any, it shows data point from relevant X position

CHANGES FOR VERSION 5.93.0 (as compared to 5.92.0)

AFL Editor provides precise positioning of cursor for errors that occur within argument list of function calls
AFL: Error 5 (incorrect type of argument in function call) is now much more precise: it tells what function expects and what type is actually found
AFL: Low Level Gfx: GfxSelectStockObject() added - allows to select so called "stock" GDI objects such as Hollow brush (that allow to draw empty circles, polygons and so on)
Available stock objects:
WHITE_BRUSH 0
LTGRAY_BRUSH 1
GRAY_BRUSH 2
DKGRAY_BRUSH 3
BLACK_BRUSH 4
NULL_BRUSH 5 (the same as hollow brush)
HOLLOW_BRUSH 5
WHITE_PEN 6
BLACK_PEN 7
NULL_PEN 8
OEM_FIXED_FONT 10
ANSI_FIXED_FONT 11
ANSI_VAR_FONT 12
SYSTEM_FONT 13
DEVICE_DEFAULT_FONT 14
SYSTEM_FIXED_FONT 16
DEFAULT_GUI_FONT 17

Example circle with hollow interior:

GfxSelectPen( colorOrange, 4 );
GfxSelectStockObject( 5 ); // hollow brush
GfxCircle(100, 100, 20 );
AFL: Low-Level Gfx: GfxSelectHatchBrush( color, style )
Supported hatch styles:
HS_HORIZONTAL 0 /* ----- */
HS_VERTICAL 1 /* ||||| */
HS_FDIAGONAL 2 /* \\\\\ */
HS_BDIAGONAL 3 /* ///// */
HS_CROSS 4 /* +++++ */
HS_DIAGCROSS 5 /* xxxxx */

Hatch color is specified by color parameter, hatch background is specified by current background color
see: GfxSetBkColor()

GfxSelectPen( colorOrange, 4 );
GfxSetBkColor( colorLightGrey );
GfxSelectHatchBrush( colorBlue, Param("Hatch pattern", 5, 0, 5 ) );
GfxCircle(100, 100, 20 );
AFL: Low-level Gfx: GfxSetZOrder now supports using z-order outside -5...+5 range, but displays a warning 903 in the editor about possible decrease in performance
AFL: Percentile() function now supports variable period and has default value for rank = 50 (such param gives median with average of upper/lower median for even periods)

Note that Percentile is very computation intensive function (it involves re-sorting arrays every bar)
and variable-period version (if you call it with period being ARRAY) runs slower than scalar version
bi = BarIndex();
x = Percentile( Close, bi, 50 );
Plot( x, "Cumulative 50% Percentile", colorRed );
Plot( Close, "Price", colorDefault, styleCandle );
AFL: XYAddChartPoint has new parameter (linecolor)
AFL: XYChartSetAxis now supports the following styles: styleLine, styleDots, styleHistogram, styleThick and combinations of those styles. Multiple lines are possible - to start a new line call add a NULL point - XYAddChartPoint( chartname, "", Null, Null );

chartname="example";
XYChartSetAxis(chartname, "[x]", "[sinx/x]", styleLine | styleDots ); // bar style
for( x = -10; x < 10; x += 0.2 )
{
y = sin(x ) / x;
XYChartAddPoint( chartname, "", x, y, colorGreen, colorRed );
}

XYChartAddPoint( chartname, "", Null, Null ); // add a NULL point to begin new line

for( x = -10; x < 10; x += 0.2 )
{
y = sin( 2 * x ) / x;
XYChartAddPoint( chartname, "", x, y, colorOrange, colorBlue );
}
Backtest: Buy-And-Hold simulation is performed and its statistics are calculated and included in the Backtest Report.
This feature in worst case (single symbol test) may add upto 30% to backtest time. In portfolio case the impact is negligible.
The Buy-and-Hold calculations are turned OFF when detailed reports are not generated, for example during optimizations, so there is no slow down,
unless you turn on report generation during optimization SetOption("GenerateReport", 1 )
You can turn it off from Settings, Reporting

Buy-and-hold simulation uses current symbol when doing single-symbol backtests/optimization.
When doing portfolio backtest for more than one symbol, it uses "Portfolio B&H symbol" as a benchmark for buy and hold.
Backtest: Report : numerical values don't get wrapped when report window is made small
Backtester: implemented user-definable interest on account margin loans, charged when net cash balance drops below zero. Margin rate (0..100%) is definable in Analysis Settings.
Margin Rate is added ON TOP of interest rate defined in the settings.
So if interest rate is set to 0.1% and Margin rate is 1%, then effective margin loan rate is 1.1%.
It also works with dynamic Interest rate, so if you define dynamic Interest Rate symbol
then Margin Rate is added ON TOP current value taken from dynamic Interest Rate
Current rates used are listed in the Detailed Log
Backtester: implemented variable interest rate earnings
To use variable interest rate:
1. Add a symbol that will hold interest rates. It does not need to have quotes every day,
you can have only quotes on days when interest rate changes.
Interest rates should be expressed in PERCENTS. So if interest is 5% you should enter 5 in "close" price field for particular date

2. Enter the rate symbol into "Dynamic interest symbol" in the Settings.

3. Enter "Fixed interest rate" in the Settings. It will be used for days PRIOR to very first date available in intrest rate symbol.
Backtester: interest earnings on positve cash balance and deductions on margin loans are now reported in detail in "Detailed log" mode every day
Filter window enhanced. Now you can select multiple categories of the same type (for example even 7 different watch lists) and combine them using "OR" (match ANY), or "AND" (match ALL)
UI: Commentary: added marquee progress bar to give visual clue to the user when formula is being executed
UI: Deletion of symbols is now confirmed with better looking task dialog that has explicit button "Yes, delete permanently" to avoid user mistakes

CHANGES FOR VERSION 5.92.0 (as compared to 5.91.1)

Analysis: Exploration's XYChart now allows bar style in addition to point style.
AFL: New argument for XYChartSetAxis("chartname", "xaxis", "yaxis", chartStyle = 0 )
Note that XY chart styles are different than regular chart styles and only two are supported at the moment: 0 (default) - point style, 1 - bar style (new)
Example of bar style usage (this is EXPLORATION code):

chartname = "example"; XYChartSetAxis( chartname, "[x]", "[sinx/x]", 1 ); // bar style for ( x = -10; x < 10; x += 0.2 ) { y = sin( x ) / x; XYChartAddPoint( chartname, "", x, y, colorGreen ); }
Second example:

chartname = "gaussian"; XYChartSetAxis( chartname, "[x]", "[gaussian]", 1 ); for ( x = -3; x < 3; x += 0.125 ) { y = exp( - x ^ 2 ); XYChartAddPoint( chartname, "", x, y, IIf( abs( x ) <= 1, colorGreen, colorRed ) ); }

Bar style is useful for displaying probability distribution charts

AFL: SetChartBkColor did not change the background behind X-axis text. Fixed.
AFL: WriteVal/NumToStr has now new roundAndPad parameter that controls whenever function rounds output beyond 7th significant digit (and pads the rest with zeros), By default rounding is OFF now because it was off in 5.90 and earlier and rounding introduced in 5.91 could confuse old time users
AFL: WriteVal/NumToStr will display Warning 506 if specified format exceeds maximum IEEE precision (7 significant digits) and roundAndPad option is turned off
Analysis: 3D optimization chart was not available after Individual (MT) Optimization. Fixed.
Analysis: a faster Export to CSV routine in 5.91.0 caused memory leak. Fixed.
Analysis: Export to CSV could run out of memory when exporting more than 2GB. Fixed.
Log window shows correct path when using "Check AFL syntax" in the editor, especially helpful if error is inside #included file
Log window: double clicking on error line brings up AFL editor and scrolls to error line / column automatically
PersistentVars.bin loading moved to AFTER CWD fix (prevents problem with deleting persistent variables when program is started with incorrect working directory)

CHANGES FOR VERSION 5.91.0 (as compared to 5.90.1)

AFL/Charts: GfxSetCoordsMode( 1 ) now works with logarithmic scale too.
AFL: added "Warning 505. Division by zero" (level 2 warning). It detects divison by zero in arrays too and prints which array element was zero
AFL: failed COM type conversion is reported as a regular error within editor/log window instead of displaying message box
AFL: new field in SetOption("WarningLevel", x ); -- allows to change warning level. Level 1 is default for all AFL executions with exception of AFL editor and commentary where warning level is set to 4
Warning Level
1 - report only level 1 warnings (502- too much plots)
2 - report level 1 and 2 warnings (above plus assignment within conditional, division by zero, threadsleep period too long)
3 - report level 1, 2 and 3 warnings (above plus createobject/createstaticobject )
4- report all warnings (default for the AFL editor)
AFL: new function AddRow("text") to add a raw text row to the exploration (allows outputing things without respecting Filter and without being limited to number of bars). This function is preliminary and its parameters are subject to change.

SetOption("NoDefaultColumns", True ); Filter = 1; AddColumn( Close, "Column1" ); AddColumn( Null, "Column2" ); for( i = 0; i < 10; i++ ) { AddRow( StrFormat( "row %g\tsecond column", i ) ); }
AFL: new functions SparseCompress( query_points, data ) /SparseExpand( query_points, data )

only_when = ( Month() % 2 ) == 0; // even months only x = SparseCompress( only_when, Close ); // compact sparse data y = MA( x, 10 ); // regular calculation y = SparseExpand( only_when, y ); // expand sparse data Plot( C, "Price", colorDefault, styleBar ); Plot( y, "Sparse MA from even months", colorRed ); function SparseCompressEquiv( sparse_array, data_array ) { result = Null; j = BarCount - 1; for( i = BarCount - 1; i >= 0; i-- ) { if( sparse_array[ i ] ) result[ j-- ] = data_array[ i ]; } return result; } function SparseExpandEquiv( sparse_array, data_array ) { result = Null; j = BarCount - 1; for( i = BarCount - 1; i >= 0; i-- ) { if( sparse_array[ i ] ) result[ i ] = data_array[ j-- ]; } return result; }
AFL: NumToStr protected against user error of specifying precision higher than provided by IEEE standard (display never exceeds 7 significant digits, rest is padded with zeros)
AFL: the engine displays more verbose error in case when GetArraySymbolCopy fails
Analysis: CSV Export speeded up 100+ times. Now exporting large files takes seconds instead of hours. Export speeds on ordinary hard disks > 80MB/sec
Charts: Interval Lock added (so now you can lock symbol or interval or both)
Commentary window - warning level raised to 4 (report all warnings in commentary window)
Sort() could crash with IndexMode = True and start parameter was greater than zero. Fixed.
When chart pane is being resized/dragged, real-time chart refreshes are temporarily held to prevent disappearing of tracking rectangle

CHANGES FOR VERSION 5.90.0 (as compared to 5.89.0)

AFL Editor: keytrigger expansion wasn't properly undone (via Edit->undo). Fixed.
AFL Editor: when last document was closed usign tab "X" mark the message prompt that asked to save changes could pop up on wrong monitor in multiple monitor setups and not disable AFL editor frame making it possible to press "X" again and cause re-entrancy problem/crash. Fixed.
Charts: rarely when chart sheets were switched an attempt to free already freed memory could occur. Fixed.
DB: fixed crash when switching databases while outstanding call for Foreign from other thread was attempting to bring up other symbol data.
IB plugin allowed to trigger backfill even if it was not connected causing potential freeze/crash. Fixed.
New Analysis: added error message when user has incorrect setting for PointValue. PointValue MUST be greater than zero.
OLE: attempt to set negative or zero PointValue results in exception
Parameter window: when screen size is not enough to fit color popup beneath color item, the popup is now displayed above the item

CHANGES FOR VERSION 5.89.0 (as compared to 5.88.0)

AFL: Performance of variable-length Sum() improved significantly in some common scenarios. Accurracy improved too.
AFL: Sort displayed an error message if first == last even though this case is perfectly fine. Fixed (no error and no sorting of single-element array)
AFL: Sort() with indexmode = True could cause immediate app exit in 64-bit version only. Fixed.
AFL: when negative 'range' was passed to variable-length version of Sum() an application exited immediately. Fixed.
Charts: Left/right extended Trend lines and Rays now use user-definable Extension Factor (new field in Study properties) instead of always infinite extent. Ext. Factor equal to ZERO means INFINITE, other values 0.1 ... 26 define how far to the left/right line is extended
Charts: max zoom achievable via View->Zoom Out is increased to 5 million bars, also Pref/Charting/Default zoom limit set to 5 million. Note that it is still possible to zoom to "all" quotes regardless of number of bars using View->Zoom->All
Debug: Crash recovery window now requires to enter steps required to reproduce problem. Without knowing what you did before it is very difficult to find out the reason and fix the problem.
Debug: Turned off remove frame pointers optimization in 32-bit builds for better stack traces
New Analysis: Exploration: default column width is increased automatically to fit %6.2f number when there is a free space available in the right margin
New Analysis: Optimization: when user-selected "Optimization target" can not be found in the backtest results an error 711 is displayed and optimization process is stopped
New Analysis: trying to bring up "Parameters" window when currently selected symbol had no quotes resulted in access violation. Fixed.
New Analysis: Walk forward tab - when you click on result list Begin/End column headers - these columns are now sorted by date instead of alphabetically.

CHANGES FOR VERSION 5.88.0 (as compared to 5.87.0)

AFL: new function NullCount( array, mode = 1 ) - counts the number of consecutive nulls at the beginning of the array (mode = 1), at the end of the array (mode=2), from both ends (mode=3) and all nulls in the array (including non-consecutive) (mode=0)

x = MA( C, 20 ); printf("Empty values at the beginning = " + NullCount( x ) );
AFL: Sort() now has additional "indexmode". If indexmode is turned on, Sort() function returns array of indexes to the sorted values instead of values themselves. So if first returned value is 2923 it means that input array[ 2923 ] is the smallest element

Filter = 1; AddColumn( BarIndex(), "Bar Index", 1.0 ); AddColumn( Close, "Close" ); AddColumn( Sort( Close ), "Sorted Close" ); AddColumn( Sort( Close, 0, -1, True ), "Index of sorted item", 1.0 );
Charts: line drawings now have user definable line width in pixels (new "Line width" field in Study Properties dialog). In addition to that "Thick line" box makes line twice as wide (so actual width of thick line is 2 * lineWidth instead of adding 1 pixel to width)
Charts: when formula causes an exception and Preferences are set NOT to catch exceptions within indicator, then further execution of formula that caused exception is blocked until Bug recovery window is dismissed (to prevent stacking multiple bug recovery windows)
Debug: 64-bit version now implements invalid parameter handler for catching wrong C runtime calls
Debug: 64-bit version: Crash recovery window now includes call stack to allow better debugging of 64-bit app (previously only available in 32-bit)
Debug: when AFL engine can not allocate memory for variable a proper message is displayed instead of plain crash
Debug: when program can not allocate memory for static variable you will get actual message "Out of memory during creation of static variable");
New Analysis: program checks From-To dates and if From > To it displays error 710 instead of starting analysis
New Analysis: QuickAFL finally implemented. To turn it on go to Settings and check "Use QuickAFL" box. Gives very significant speed-ups (>2x) when range is smaller than "All quotes"
Prefs/Backtest: Number of user-definable currencies in Tools->Preferences increased from 20 to 100.
Prefs/Charting: "Default zoom (number of bars in a chart)" can now be greater than 32767 (previous limit). Now it can be in range from 10 to 10 000 000.
UI: when free virtual memory drops below 200 MB a popup is displayed in the status area

CHANGES FOR VERSION 5.87.0 (as compared to 5.86.0)

AFL Editor: in-line error reporting use bold font to highlight identifiers in the error messages for better readability
AFL: GetOption can now read BuyDelay/SellDelay/ShortDelay/CoverDelay which makes it easier to write like this:
InLong = Ref( Buy, GetOption("BuyDelay") ); // make sure we delay the signal in sync with settings
ApplyStop( stopTypeLoss, stopModePercent, IIF( InLong, 10, 15 ), True ); // 10% stop for long 15% stop for short
AFL: new function: Reverse( array, first = 0, last = -1 ) - returns a new array with the order of the elements in specified range reversed
AFL: new function: Sort( array, first = 0, last = -1 ) - sort a numerical array in ascending order starting from 'first' element ending at 'last' element. If 'last' is not specified or negative then AmiBroker will use BarCount - 1

Filter = 1; AddColumn( BarIndex(), "BI"); AddColumn( Close, "Close"); AddColumn( Sort( Close ), "Sorted"); AddColumn( Reverse( BarIndex() ), "Reversed BI" );
AFL: new function: StrSort( "item,list,to,be,sorted", caseSensitive = True, separator = ',' ) - perform sorting of comma-separated string (case sensitive/insensitive, separator definable!)
AFL: new function: StrTrim( "string", "targets", side = 3 ) - a function to trim extra characters (specified in "targets") from either left (1), right(2) or both(3) sides of the string. If "targets" parameter is an empty string, then function trims whitespaces (i.e. space, tab, newline)

Here is example of StrSort/StrTrim in per-symbol profit / loss custom metrics code. Compared to Knowledge Base article it outputs SORTED list of symbols.

function ProcessTrade( trade ) { global tradedSymbols; symbol = trade.Symbol; // if( ! StrFind( tradedSymbols, "," + symbol + "," ) ) { tradedSymbols += symbol + ","; } // // HINT: you may replace it with GetPercentProfit if you wish profit = trade.GetProfit(); // if( trade.IsLong() ) { varname = "long_" + symbol; VarSet( varname, Nz( VarGet( varname ) ) + profit ); } else { varname = "short_" + symbol; VarSet( varname, Nz( VarGet( varname ) ) + profit ); } } // SetCustomBacktestProc( "" ); // /* Now custom-backtest procedure follows */ // if ( Status( "action" ) == actionPortfolio ) { bo = GetBacktesterObject(); // bo.Backtest(); // run default backtest procedure // tradedSymbols = ","; // //iterate through closed trades for ( trade = bo.GetFirstTrade( ); trade; trade = bo.GetNextTrade( ) ) { ProcessTrade( trade ); } // //iterate through open positions for ( trade = bo.GetFirstOpenPos( ); trade; trade = bo.GetNextOpenPos( ) ) { ProcessTrade( trade ); } // tradedSymbols = StrTrim( tradedSymbols, "," ); tradedSymbols = StrSort( tradedSymbols ); //iterate through the list of traded symbols and generate custom metrics for ( i = 0; ( sym = StrExtract( tradedSymbols, i ) ) != ""; i++ ) { longprofit = VarGet( "long_" + sym ); shortprofit = VarGet( "short_" + sym ); allprofit = Nz( longprofit ) + Nz( shortprofit ); // metric uses 2 decimal points and // 3 (calculate sum) as a "combine method" for walk forward out-of-sample bo.AddCustomMetric( "Profit for " + sym, allprofit, longprofit, shortprofit, 2, 3 ); } } // SetOption( "MaxOpenPositions", 10 ); // Buy = Cross( MACD(), Signal() ); Sell = Cross( Signal(), MACD() ); Short = Sell; Cover = Buy; SetPositionSize( 10, spsPercentOfEquity ) ;
AFL: StrExtract has now extra parameter allowing to specify separator character, example StrExtract("This;Is;Semicolon;Separated", 3, ';' );
AFL: StrMid( "string", start, count ) now allows to skip "count" parameter. If you skip count, then a substring starting from 'start' to the end of the string will be returned.
Charts: added ability to control number of decimals in chart value labes via GraphLabelDecimals variable (example, adding GraphLabelDecimals = 2; to the formula would give you value lables with 2 decimal places
Removed old-style Graph3*, Graph4*, Graph5*, Graph6*, Column3, 4, 5, 6 identifiers from auto-complete lists (only 0..2 left)
Report Explorer: Edit->Copy now copies selection only (not entire table)

CHANGES FOR VERSION 5.86.0 (as compared to 5.85.0)

AFL Editor: repeat replace + wrap around restarts only once and if no further matches/replaces are found it displays "no more matching texts" instead of restarting again.
AFL Editor: when user closed Find&Replace dialog and then pressed F3 (find next) a couple of times to pass thru the end of document a crash could occur. Fixed.
Analysis: HTML report generator - settings page used </TD> tags to close some <TH> tags which is formally incorrect, even if it works. Fixed.
Charts: Extreme descenders in text could be truncated (by one pixel) in multiple line Title strings. Fixed.
HTMLView - Backtest report viewer - added Edit/Copy, Edit/Select All and Edit/Copy TABLE. The last command transforms HTML tables into CSV format and copies it into clipboard so tables can be pasted easily to Excel. Also it divides Entry/Exit columns into separate Entry/exit date/price columns
Parameter window: mouse wheel scroll is now supported
Realtime Quote window: added Bid/Ask trend - a graphical indicator showing the direction of 10 most recent changes in real-time bid/ask prices
The right-most box is most recent and as new bid/ask quotes arrive they are shifted to the left side. Color coding is as follows:
Dark green: bid > previous bid OR ask > previous ask
Bright green: bid > previous bid AND ask > previous ask
Dark red: bid < previous bid OR ask < previous ask
Bright red: bid < previous bid AND ask < previous ask
Red / Green box: ask < previous ask AND bid > previous bid
Green / Red box: ask > previous ask AND bid < previous bid

If bid/ask prices don't change there is no new box.
NOTE: This column works only if there are real-time quotes streaming (markets are open)
Realtime Quote window: Sorting by Full name column did no work. Fixed
Report Explorer: Column layout (order and sizes) is now saved and restored between runs
Report Explorer: Loading and refresh performance significantly improved (5x) using owner draw/ virtual mode
Report Explorer: Multi-column sorting implemented
Report Explorer: Numeric columns are now right aligned for better readability
Report Explorer: visuals significantly improved (list uses modern style, grid lines, immediate column resizing, double buffering for no flicker, thousand separators, negative values are displayed in dark red, HighDPI aware, changed toolbar)
Snippet properties window now includes formula field for quick reference (no highlighting here - it is by design)

CHANGES FOR VERSION 5.85.0 (as compared to 5.84.0)

AFL Editor: backtest* mode constants added to auto-complete list
AFL Editor: now Code snippets are available in auto complete list (type @ plus first letter of snippet key trigger), and even without auto complete activated @keytrigger is replaced by snippet text
AFL: added support for single-character literals, so you don't need to use Asc() funciton.

Buy = Cross( MACD(), Signal() );
Sell = Cross( Signal(), MACD() );
Filter = Buy OR Sell;

AddColumn( IIf( Buy, 'B', 'S' ), "Signal", formatChar );
AFL: adding/removing symbols to/from watch list via CategoryAddSymbol/CategoryRemoveSymbol wasn't thread safe. Fixed.
AFL: AmiBroker now checks number passed to SetOption("MaxOpenPosition", x ) and SetOption("WorstRankHeld",x ) and trims down the request to number of symbols in database to prevent running out of memory when user specifies some absurdly high values,
AFL: new function SendEmail( "subject", "message", ShowUI = False )

A direct version of functionality already provided by AlertIF. This function sends e-mail unconditionally and it is easier to use if you don't need state logic provided by AlertIf.
Note that "From" and "To" addresses as well as SMTP email configuration should be done in Tools->Preferences, "Alerts" page.
Without configuring E-mail settings first this function will not work.
E-mails are sent asynchronously (so function returns BEFORE e-mail is actually sent, sending occurs in the background)

ShowUI parameter decides whenever user interface of e-mailer program is shown after sending e-mail or not.
AFL: SetOption("MarginRequirement", x ) checks if x is in the range 1..100 and displays an error if not.
Backtest: backtestRegular now keeps detailed info on sequencing of signals within single bar to avoid problems with premature exit of just opened trade when same bar exits were allowed and previous trade was not open due to insuffcient funds leaving an unmatched exit signal.

In case when an exit signal that really belongs to previous trade was found on the bar when next trade was open AmiBroker would display the following entry in the detailed report log:
< Symbol> Exit/Entry/Scaling ignored because signal predates already processed event.
FWIW: The issue did not affect other backtest modes.
Code Snippets: added "Properties" button to the toolbar that allows editing name/description/key trigger without re-inserting snippet
Code Snippets: New snippet/Properties dialog is now resizable
UI: changed cursor shape in all tree views from "hand" to normal arrow
UI: Code snippet window is now also available when AFL editor is in MDI mode (use Window->Code Snippet menu when AFL editor is open)
UI: Interpretation window: Ctrl+C (clipboard copy) did not copy the interpretation text in 5.8x. Fixed.

CHANGES FOR VERSION 5.84.0 (as compared to 5.83.0)

AFL Editor: Idle-time Info tips were positioned incorrectly in 5.83. Fixed.
AFL Editor: Text of inserted snippet is selected so one can easily see what was inserted and delete it if was a mistake.
AFL: added Error 57. Invalid quotation mark (when user uses curly quotation marks instead of straight quotation marks " to type a string literal)
OLE: Document object has new property Interval (integer, read/write) - selected Interval in seconds (tick/range/volume intervals are represented by negative values)
Report Charts: now it is possible to output HTML instead of graphics in report chart formulas using AFL: EnableTextOutput( 3 ) - HTML output to backtest report
Report Charts: rewritten 3. Profit Table.afl using HTML embedding features auto-scalable layout (so it enlarges when numbers are bigger), bold summary columns, negative values in red, boundary date changed to last day of year/month
UI: added Code Snippets window - allows inserting/deleting/saving selected parts of the formula as snippets. Also implemented is convenient drag-drop of snippet to the formula edit window
UI: Further display improvements of Parameter window for high-DPI displays (ParamList bullet point is bigger and positioned better, Slider is resized when resizing param window, etc, etc)
UI: On non-standard DPI displays Parameter window could show some visual artifacts when scrolling. Fixed.

CHANGES FOR VERSION 5.83.0 (as compared to 5.82.1)

New Analysis: Watch list 0 was used automatically (without opening WL selection dialog) when new watch list is created between scan and RMB click->Add results. Fixed.
UI: Parameter window look and feel improved. Item height is increased and slider thumb made wider for easier use on small size/high DPI screens
Commentary: attempt to display commentary on symbol without any quotes could cause access violation. Fixed.
AFL Editor: Verify formula run on symbol without any quotes could cause access violation. Fixed (proper error message is displayed).
Analysis: Table header in the HTML report trade list is now right aligned (to match number alignment) (affects newly generated reports only)
AFL editor: when syntax check is performed and errors are detected, the editor is immediately scrolled to first error
Analysis: Minimum value for "Margin Requirement" is now 1 (1%)
AFL: Since v5.65 RestorePriceArrays() did nothing when there was no preceding SetForeign/TimeFrameSet. Now restores data if user explicitely overwrote OHLC arrays in the code preceding it.
Analysis: Detailed Log message "Symbol not entered bcause of insufficient funds" improved to display requested position size in units such as shares/% of equity instead of just encoded negative value
AFL engine: brand new custom micro allocator speeds up AFL execution of complex formulas with nested loops upto 3 times.
Turned on LowFragmentationHeap in number of places
Code snippets: New line \n was truncated from "data export" snippet. Fixed.
AFL Editor: parameter info tip does not disappear on pressing Backspace key anymore.
AFL Editor: Parameter info updates highlighted parameter when moving cursor inside function's param list
New Analysis: Less refreshes of Info page provide some extra speed
Analysis: fixed HoldMinBars check for scenario 3 with both buy and sell generated on all bars and random scores.

CHANGES FOR VERSION 5.82.1 (as compared to 5.82.0)

AFL Engine: fixes for stability issues in 5.81.0/5.82.0
Filter dialog: a matching count wasn't updated on opening the dialog. Fixed.
Bug report window made a little bigger so at least crash address is seen when someone sends screenshot instead of text

CHANGES FOR VERSION 5.82.0 (as compared to 5.81.0)

UI: Interpretation and Commentary windows now support color text (via EncodeColor), bold and italic styles (tags: for bold, for italic). Example:

printf("Bold text\n"); printf("Italic text\n"); printf("Now " + EncodeColor( colorRed ) + "red text\n"); printf("and finally " + EncodeColor( colorGreen ) + "green AND bold AND italic\n"); printf(EncodeColor( colorBlack ) + "going back to black");
UI: Notepad, Interpretation and Commentary windows use default GUI font instead of hard-coded Tahoma now
AFL: functionality of PlotGrid() function extended

PlotGrid( level, color = colorDefault, pattern = 1, width = 1, label = True )
pattern - defines line pattern. Available grid patterns 1..10 as shown in the Tools->Preferences, "Axes & Grids"
1-7 are single pixel patterns, 8 is regular windows dot pattern (PS_DOT) , 9 is regular Windows dash pattern (PS_DASH), 10 is solid line

width - grid line width (in pixels). Note that due to Windows GDI limitations only patterns 8 (PS_DOT), 9 (PS_DASH), 10 (PS_SOLID) are available in widths > 1

label - whenever to display value label or not

Use PlotGrid to display horizontal lines that are constant instead of using Plot.
PlotGrid offers much better performance in this case.

So instead of

Plot( 50, "", colorRed, styleLine | styleThick );

use:

PlotGrid( 50, colorRed, 10, 2, False ); // solid line 2 pixels thick, no label
AFL Editor: added 4 new snippets under "Function" category
UI: Filter dialog now displays number of matching symbols in real-time as selections are made
AFL: CCI function speeded up by 50%
Inserting indicator with Param() calls into chart when currently selected symbol had no quotes caused exception. Fixed.
AFL: In 5.81.0 CategoryGetName returned nothing (void) instead of string type when specified category did not exist. Fixed (empty string is returned now)
New Analysis: portfolio backtest processing was attempted even if there was no symbols that matched "apply to" filter. Fixed (unnecesary processing is skipped now).
AFL engine: in v5.81 access violation could occur when AFL array size was 0. Fixed.

CHANGES FOR VERSION 5.81.0 (as compared to 5.80.3)

AFL Engine: custom memory allocator does not use Microsoft runtime lib for reference tracking anymore. Result - complex formulas with lots of loops and OLE (especially low-level custom backtests) run upto 3 times faster in 32 bit and 4 times faster in 64-bit
AFL Editor: Parameter info tip significantly enhanced - now it re-opens on typing each , (comma) and highlights current parameter to be entered.
UI: Column setup dialog: added Mark All / Toggle All buttons
AFL: GetFormulaPath() function added - returns full formula file path
AFL Editor: Smart reference highlighting implemented (usage: mark a word and all references become highlighted).
AFL Editor: Find/Replace shows a message box when reached the end of the file and offers restarting from the beginning if new "Wrap around" option is turned on.
AFL Engine: code refactoring for reduced size and improved speed
AFL: when value of unsupported type was appended to string a crash could occur. Fixed.
AFL Engine: when IIf was called the memory upsized from scalar to array could get freed twice (wrong). Fixed
AFL: MACD() and Signal() functions made faster (approx 1.5-2x times)
Analysis: Interest is added at the beginning of next bar (instead of end of current bar), to account for overnight rate. This also fixes the problem of ignoring interest in v.> 5.69
UI: fixed yet another place where entering customization changed working dir

CHANGES FOR VERSION 5.80.3 (as compared to 5.80.2)

GfxTextOut / GfxDrawText did not work well in new co-ords mode = 1. Fixed.
When Customize was entered from editor frame and user browsed for bitmap image for the toolbar it could change current working directory. Fixed.
Editing and saving some old charts formulas that were using absolute paths (instead of relative) did not cause immediate chart update. Fixed.

CHANGES FOR VERSION 5.80.2 (as compared to 5.80.0)

UI: Status bar prompt for recent databases and recent files was incorrect. Fixed.
When a formula that uses Category* functions is run inside commentary window, the symbol list is auto-refreshed now.
When commentary window was open on completely empty database a crash could occur. Fixed.
New Analysis: Progress bar is not hidden until custom portfolio backtest phase is completed
AFL: when artithmetic operator was applied to variable that was uninitialized or having invalid type a crash could occur. Fixed.
DB: If external data source set incorrect group or market or industry ID (lower than 0 or higher than 255) a crash could occur when updating symbol list. Fixed, incorrect data are switched back to zero and warning message is displayed.
New Editor: when user changes the formula name and presses "Save" the editor now displays a confirmation dialog if file already exists
Charting: X-axis grid calculation speeded up 3x (for large number of bars)
When chart pane had NULL formula path attempt to edit formula or drag-drop it could cause crash. Fixed.
New Editor: crash could occur when formula was Saved as..." for the first time outside "Formulas" folder and its subfolders. Fixed.
AFL: Error 56 "Variable has an invalid type" added when variable has uninitialized type or type set to some strange value (plugins may cause this due to programmer error)
AFL: in multithreaded charts unhandled exceptions where not caught inside indicator even though preferences setting was to catch them. Fixed.
AFL: when formula is executed in "Indicator" mode the execution stops at very first error and this error is displayed as most relevant in the chart pane instead of last error which is usually not relevant (often side effect of previous errors)

CHANGES FOR VERSION 5.80.0 (as compared to 5.79.0)

New Analysis: An error 709 is displayed when user specified so many Optimize() calls that search space is larger than 10^19 combinations (100 times more than the age of The Universe in seconds)
New Analysis: progress bar update is forced so even if program is 100% busy the progress bar gets repainted
New Analysis: "the analysis is in progress" text was not always cleared after analysis has completed. Fixed.
New Editor: Param info is displayed even when there are spaces between identifier and opening brace
New Editor: A full path to formula is displayed in the Status bar when mouse hovers over formula name edit
New Editor: pressing ENTER just after identifier name resulted in auto-change case function ommitting first letter of the word. Fixed
New Editor: added Window->Keep On Top menu (in separate frame mode)
New Editor: Auto-complete pop up in immediate mode now does not appear when editing existing word in the middle, but it is available on demand (Ctrl+SPACE)
AFL: increased maximum acceptable value for ThreadSleep function to 1000 ms, and added appropriate level2 warning
AFL: Error 52 wording changed from 'argument must be positive' to 'argument must be greater than zero'
UI: when any non-modal dialog was displayed, activation of the app always brought up main frame in front possibly hiding New Editor. Fixed.
UI: removed "use new editor" option from Preferences window. New editor is always used now.
UI: Main frame is now disabled (modal) when file dialog is open from AFL editor
Pre-processor errors occuring in run-time caused that chart pane stopped refreshing. Fixed.
Charts: Bar chart close/open ticks are by default one pixel smaller
Weekly compression for Sunday data was off by one day for dates pre-1970. Fixed.
Weekly compression now offers user-selectable "first day of the week" in File->Database Settings->Intraday Settings
Application manifest modified to include compatibility section for Win 8.x
Threads use current dir stored at application startup and resolve relative paths in AB, not to rely on Windows, so relative paths are resolved even if Windows changes dir

CHANGES FOR VERSION 5.79.0 (as compared to 5.78.0)

New Editor: Inverting colors on printout did not work for many backgrounds. Now white color is always used for background, foreground colors are kept unchanged, except for white which is replaced with black
New Editor: Changing formula name marks it as "modified" so Save icon becomes enabled
New Editor: Edit->Clear error message menu item added in MDI mode
New Editor: Save icon is now grayed when formula is not modified
New Editor: when separate editor frame was minimized, choosing "Edit formula" did not restore frame back to normal (non-minimized) state. Fixed.
New Editor: Fold/Unfold did not always work correctly. Fixed. Also Fold All folds on 1st level only, so it requires less clicks to unfold one section.
New Editor: Copy as HTML automatically replaces white font with black. Also HTML is shorter (black text does not use tag) and coloring is forced, so long texts are correctly copied with colors.
New Editor: relative paths caused problems with ReplaceFile API and FAT32, so relative paths are now converted to absolute prior to saving
New Analysis now rejects attempts to use non-exhaustive optimization (OptimizeSetEngine) when number of exhaustive optimization steps is less than 100 (Error 708)
DB: when broker.markets, broker.groups, broker.workspace files were missing then markets and groups from previously loaded DB leaked to newly created/loaded db. Fixed - now they are always initialized with defaults. Also default market 0/group 0/sector 0/industry 0 is now labelled "Undefined"
ASCII import: $MARKET and $GROUP commands allow to specify the name of market/group (after comma) to be updated during import
UI: added File->Save All menu item to separate editor frame
AFL: reverted change #2623 as it resulted in regression in custom portfolio backtest speeds
Charts: Reverted #2621 change from 5.78.0 cached bitmap is now stretched when chart is resized while the formula is being run
Persistent variables that were loaded from PresistVar.bin but not updated by the formula were removed on next start. Now they are kept.

CHANGES FOR VERSION 5.78.0 (as compared to 5.77.0)

Prefs: "Use new editor" is now always turned ON at the start of application.
Low Level Gfx: performance improved for formulas making thousands of calls to Gfx functions (3x speed up for 200K calls)
Charts: cached bitmap is now stretched when chart is resized while the formula is being run
On saving broker.newcharts file a backup file is created prior to saving. Then on startup in case broker.newcharts is corrupted, a backup file is used instead
New Editor: when auto-complete was in immediate mode typing xx.a resulted in xx.AddCustomMetric to be shown immediately. Fixed - now in 'immediate' mode single-selection choices are not auto-completed without user consent.
New Editor: when user selected black background the colors on printout are inverted to save toner/ink. Also added File->Print/Print Setup menu item.
New Editor: on application close editor window frame is closed first instead of last. This gives more 'graceful' exit.
New Editor: on dark backgrounds unmatched brace is displayed in lighter blue color (instead of dark blue) for better visibility
New Editor: Autocomplete listbox is now dismissed when user drags separate editor frame or MDI child frame
New Editor: now it uses application theme instead of hard-coded "VS2010" theme
New Editor: auto complete does not try to pop up in file paths in #includes. Also improved auto-complete operation in the very last line.
New Editor prints debug string when saving document in order to diagnose possible issues with FAT32/WinXP
Sometimes crash occured on Window->Floating command when Interpretation window was open. Fixed.
UI: Window->Toggle Frame restores window from icon state (if was minimized) now.
UI: added View->Fold / Unfold, Margin menu items in the MDI editor menu
UI: Charts file treeview gets refreshed when saving AFL to any folder, not only 'Custom'
UI: Customize keyboard page now displays an error message on attempt to create shortcuts with A-Z letters and 0-9 digits without Ctrl/Shift/Alt modifiers to prevent clash with the editor
UI: AFL formulas are saved in separate MRU (most recently used) list (File->Recent Formulas) so they do not interfere with other document types using Recent File list

CHANGES FOR VERSION 5.77.0 (as compared to 5.76.0)

New Editor: 'Use separate frame' mode implemented (Tools->Preferences, "Editor" to turn this off and open as tab in main frame)
New Editor: Toolbar customization functionality added
UI: Window->Toggle Frame (Ctrl + ` ) menu/shortcut added to quickly switch between main and separate editor frame
UI: Window menu reordered (Tile/Cascade items moved up)
New Editor: in 5.76 pressing Help button on dialogs when new editor was open, directed help file to 'formula editor' page instead of given dialog help file. Fixed.
New Editor: On dark backgrounds the selection is darker than it was before
New Editor: typing non-US characters (with right Alt key) is now working
New Editor: Copy As HTML implemented
New Editor: added ability to turn off line number margin, selection margin, fold margin (from View menu)
New Editor: added View->Fold All / Unfold All commands
New Editor: when relative paths were used sometimes auto-reload and auto-save before analysis did not work. Fixed.
New Editor: Caret Ln/Col position is displayed in the status bar
New Editor: Closing top error message bar clears ALL in-line error messages
New Editor: added Edit->Clear Error message menu (Ctrl+E) - it clears an error(s) in currently selected line/range
New Editor: The width of line number margin is automatically adjusted with regards to font size and line count and zoom level
New Analysis: Progress bar is shown/hid quicker

CHANGES FOR VERSION 5.76.0 (as compared to 5.75.0)

New Editor: Auto-complete has now 3 modes: disabled, on-demand (shows auto complete list when you press Ctrl+SPACE as in old editor) and immediate (auto-complete pops up immediately)
New Editor: Auto change case and auto parameter info features can be turned off from the preferences
Prefs: Editor page changed:
a) added "Virtual space" checkbox to control whenever ability to move caret past the end of the line is enabled or not
b) replaced "Auto-complete" box with 3-way selection radio buttons (Disable/On-demand (Ctrl+Space)/Immediate) - to control whenever auto-complete opens on Ctrl+SPACE combination or immediately after typing first letter
c) removed "Use syntax highlighting" box (now it is always ON)
d) removed "Highlight error line" (now it is always ON)
New Editor: File is saved automatically when it is open in Analysis window and analysis is run
UI: leftover and/or user-defined keyboard accelerators for HOME/END/PAGE UP/DOWN, letters and digits without Ctrl/Alt modifier are removed on startup not to interfere with the editor
UI: Ctrl+F added to default key accelerators
New Editor: Implemented user-defined colors/styles/font (from Tools->Preferences, "Editor").
NOTE:
In 5.75 on Vista, Windows 7 and Windows 8 the editor automatically switched to modern ClearType "Consolas" font that is present on those systems.
If you want to use this new font instead of old "courier" font, go to Tools->Preferences, "Editor" and choose "Consolas" font and size 10pt.
New Editor: Implemented Help features (access to help pages Function reference, Using AFL Editor, Param info, etc)
New Editor: Chart tree is auto-refreshed when formula is saved under new name (Save As...)

CHANGES FOR VERSION 5.75.0 (as compared to 5.74.0)

Completely new AFL Editor, integrated with MDI structure with many new features
- line numbering
- code folding
- automatic indent
- indentation markers
- brace highlighting
- improved auto-complete
  - shows up immediately after typing 1 char
  - properly detects multi line comments
  - displays custom backtester member methods / properties
- in-line error reporting / highlight

TO SWITCH BACK TO OLD editor use Tools->Preferences, "Editor" tab: UNCHECK "Use New Editor"

NOTE ALSO: that color/font preferences do not affect new editor yet (it is on to-do list).

New Analysis: few messages displayed in modal message box were moved to message bar
UI: Active state is tracked separately for each document type (so there is 'last active chart' , 'last active analysis") to allow functioning of new editor
InfoSite added to the PluginNotification structure (Notify API callback)

struct PluginNotification
{
int nStructSize;
int nReason;
LPCTSTR pszDatabasePath;
HWND hMainWnd;
struct StockInfoFormat4 *pCurrentSIOld;
struct _Workspace *pWorkspace;
struct StockInfo *pCurrentSINew;
struct InfoSite *pInfoSite; // NEW 5.74
};
AFL: Parser tracks position of some operators better so errors and warnings should show locations more precisely (for example Warning 501 points to = sign now)
AFL: Parser produces more descriptive "Syntax error, indentifier 'name' is undefined " or "... is not a function" when it encounters a function call for undefined identifier or indentifier that is a variable. Previously it returned 'syntax error, unexpected '('
UI: removed global user-definable accelerators for Chart/Pageup/down/home/end because they interferred with new AFL editor. Instead chart page/up/down/home/end implemented locally (work only when chart has focus)

CHANGES FOR VERSION 5.74.0 (as compared to 5.73.0)

AFL Editor: Code snippets implemented (phase 1). Code snippet is a small piece of AFL code. It can be inserted by right-clicking in the AFL editor window and choosing "Insert Snippet" menu

This is phase 1 of implemetation of code snippets. There will be other elements added in the future.
There are two files located in AmiBroker directory that hold snippets:
CodeSnippets.xml - these are snippets shipped with AmiBroker installation (and can be replaced in subsequent installations, so don't modify it!)
UserSnippets.xml - these are user-definable snippets. This file is NOT present in the installation and user can create it by him/herself.
The XML schema for snippets file is simple (as below). Key trigger functionality is NOT yet implemented, however Keytrigger fields should be included in the definition for future use. It will be work like 'autocomplete' so that you type the shortcut it, it will unfold to the formula.

Suggestions for new snippets are welcome.

<?xml version="1.0" encoding="ISO-8859-1"?> <AmiBroker-CodeSnippets CompactMode="0">

<Snippet> <Name>First Snippet</Name> <Description>Description of the snippet</Description> <Category>User category</Category> <KeyTrigger>?trigger1</KeyTrigger> <Formula> <![CDATA[

// the formula itself

]]> </Formula> </Snippet>

<Snippet> <Name>Second Snippet</Name> <Description>Description of the snippet</Description> <Category>User category</Category> <KeyTrigger>?trigger2</KeyTrigger> <Formula> <![CDATA[

// the formula itself

]]> </Formula> </Snippet> </AmiBroker-CodeSnippets>
AFL: Low level GFX: Multi-layering (z-order) implemented. AFL: GfxSetZOrder implemented

Plot( C, "Price", colorDefault ); GraphGridZOrder = 1; GfxSetZOrder(0); GfxSelectSolidBrush( colorGreen ); GfxCircle( 100, 100, 100 ); GfxSetZOrder(-1); GfxSelectSolidBrush( colorRed ); GfxCircle( 150, 150, 100 ); GfxSetZOrder(-2); GfxSelectSolidBrush( colorBlue ); GfxCircle( 180, 180, 100 );
AFL: Low-level GFX: radius in GfxCircle() function is expressed in "X" units (so it actually draws circle instead of ellipse when coords mode is 1). Additionally you can specify radius in pixels even in co-ords mode = 1. To do so pass radius as NEGATIVE number. Also one pixel is now added to the rounding box so circle is centered at "x,y".
// fractional radius is supported, so 0.5 would mean half of space between bars Plot ( C, "", colorDefault); GfxSetCoordsMode( 1 ); GfxSelectSolidBrush( colorViolet ); GfxSelectPen( colorRed );bi = BarIndex(); start = FirstVisibleValue( bi ); end = LastVisibleValue( bi ); r = Param("radius", 1, -5, 4, 0.1 ); for ( i = start; i <= end; i ++ ) { GfxCircle ( i , Close [i] , r); }
AFL: Low level GFX: in 5.73.0 the pixel co-ordinates were rounded differently than in 5.72 and earlier. Fixed.
AFL: Low level GFX: new function GfxGetTextWidth - returns pixel width of specified string. NOTE: it is slow because it has to create temporary DC and font to measure the text. It takes 40us (microseconds), that is about 40 times more than other Gfx functions.

GfxSetZOrder(5 ); GfxSelectFont("Tahoma", 30 ); GfxSetTextColor( colorWhite ); text = "This is a test"; GfxTextOut(text, 0, 50); GfxSetTextColor( colorRed ); GfxTextOut("second part in red", GfxGetTextWidth(text), 50 );
AFL: fopen - new parameter: 'sharing' decides whenever file is open in sharing mode or not. When sharing is True a file is prepared for subsequent shared reading and writing.

When sharing parameter is True the following things happen:
- when mode is "w" (writing) or "a" (appending) then file is open with a sharing flag that denies others to read and/or write at the same time
- when mode is "r" (reading) then file is open with a sharing flag that denies others to write to the file (shared reads are allowed)
- when open is unsuccessful due to sharing violation (other processes / threads have that file open and deny reads/writes) then fopen would wait for 250ms and retry automatically 4 times. After 4 unsuccessful retries it fails with file handle == Null.
When sharing parameter is set to False (default) no such checking occurs and file is open anyway without denying others to read/write. This may cause data corruption if file is written to from multiple threads/external processes at the same time. If you want to use this mode (sharing set to False) in multithreaded environment to write data, you need to care about synchronization yourself for example using critical section.
UI: Added "Name" (full name) column to Real-time quote window
AFL: Implemented user control over Y-axis cursor and tooltips by means of new option chartDisableYAxisCursor, chartDisableTooltips added to SetChartOptions

SetChartOptions( 1, chartDisableYAxisCursor | chartDisableTooltips ); // don't change cursor shape in Y axis area and tooltips

CHANGES FOR VERSION 5.73.0 (as compared to 5.72.0)

AFL: SetOption("StaticVarAutoSave", interval ) - added to allow periodical auto-saving of persistent static variables

The interval is given in seconds.
For example:
SetOption("StaticVarAutoSave", 60 ); // auto-save persistent variables every 60 seconds (1-minute)
It is important to understand that persistent variables are saved ON EXIT automatically, without any user intervention
so it should be enough for most cases. If you for some reason want auto-saves when AmiBroker is running, then
you can use this function.

Please note that writing many static variables into physical disk file takes time and it blocks all static variable access
so you should AVOID specifying too small auto-save intervals.
Saving every second is bad idea - it will cause overload. Saving every 60 seconds should be fine.

Calling function with interval set to zero disables auto-save.

SetOption("StaticVarAutoSave", 0 );
AFL: new GfxSetCoordsMode - rewritten Low-Level Gfx to allow fractional coords and bar/price co-ords mode in addition to pixel

// NEW FUNCTION
GfxSetCoordsMode( mode );
- allows to switch co-ordinate system for low-level gfx functions from sceen pixel (mode = 0) - the default, to
bar / price mode (mode = 1 ) where X is expressed in bar index and Y is expressed in price.
This new mode allows way easier overlays on top of existing charts without need to do conversion between bars/price pixels
and without any extra refresh normally required in old versions when Y scale changed.

The function can be called to switch back and forth from pixel -> bar/price mode and vice versa a number of times
allowing to mix different modes in the same chart.

When co-ordinate mode 1 is selected (bar/price), co-ordinates can be fractional. For example if x is 2.5 it means half way between bar 2 and 3.

Example:
// The sample shows how using GfxSetCoordsMode( 1 ) // results in // a) easier coding of overlay charts that plot on top of built-in charts (no need to convert from bar/price to pixels) // b) perfect matching between built-in Plot() and Gfx positioning Plot( C, "Price", colorDefault, styleLine ); GfxSetOverlayMode( 1 ); GfxSetCoordsMode( 1 ); // bar/price mode (instead of pixel) GfxSelectSolidBrush( colorRed ); GfxSelectPen( colorRed ); boxheight = 0.01 * ( HighestVisibleValue( C ) - LowestVisibleValue( C ) ); bi = BarIndex(); start = FirstVisibleValue( bi ); end = LastVisibleValue( bi ); for ( i = start; i <= end; i++ ) { Cl = Close[ i ]; Op = Open[ i ]; Color = IIf( Cl > Op, colorGreen, colorRed ); GfxSelectPen( Color ); GfxSelectSolidBrush( Color ); bodyup = Max( Op, Cl ); bodydn = Min( Op, Cl ); GfxEllipse( i - 0.4, bodyup, i + 0.4, bodydn ); GfxMoveTo( i, H[ i ] ); GfxLineTo( i, bodyup ); GfxMoveTo( i, bodydn ); GfxLineTo( i, L[ i ] ); }
Charts: functions calculating day offset (GetBarsBetweenDates) support years > 2038 and are now much faster (don't count days in loops but use smarter calendar math instead)
Charts: Cycle Lines tool has drawn lines in weird places when using very long cycles that resulted in lines being positioned beyond 2038. Fixed.
UI: added View->Price chart style->Bars without ticks
Change #2534 made in 5.71.0 (allowing Null for Close field in bar chart) created backward compatiblity issue. Reverted. Instead a new styleBarNoTick introduced that allows to plot bar chart without open/close ticks:

Plot( IIf( Month() & 1, C, Null ), "Price", colorDefault, styleBarNoTicks | styleThick ); // bar chart without open/close ticks
New Analysis: when Non-exhaustive Optimize was used on symbol without any quotes, UI displayed error and remained disabled and it was not possible to re-run non-exhaustive opt. Fixed.
New Analysis: Backtest: Profit figures are color-coded now (negative - red/positive - green)

CHANGES FOR VERSION 5.72.0 (as compared to 5.71.0)

AFL: new feature: high-performance Persistent Static variables implemented (StaticVarSet has new parameter 'persist' - if it is set to True then static variable will be stored in PersistVars.bin file when AmiBroker is closing and reloaded automatically on next startup, preventing the values of static variables between application runs)

if( ParamTrigger("Set variable", "Set" ) ) { StaticVarSet("varx", Close, True ); // set persistent variable } Plot( StaticVarGet("varx"), "Persistent var", colorRed );
64-bit optimizer plugins: fixed issue in SPSO/Tribes with OptimizeSetOption not working correctly
UI: Interpretation and Notepad windows do not flicker anymore when they are resized
ASCII importer: added $USEONLYLOCALDB command
If data is fed by database plugin, using the ASCII importer to add any symbol causes these newly added symbol to have "Use only local database" flag turned on.
A new command:
$USEONLYLOCALDB 0
allows to turn this off (so newly added symbols have "use only local database" turned off)

This flag does NOT affect existing symbols.
Symbol pane full-text search is user-configurable (from options menu) and now supports searching by alias, address, country (in addition to search by symbol and full name).

CHANGES FOR VERSION 5.71.0 (as compared to 5.70.2)

AFL: PlotText() now has additional parameter yoffset: PlotText( "text", x, y, color, bkcolor = colorDefault, yoffset = 0 )
yoffset allows to specify PIXEL offset to Y coordinate which is expressed in price in PlotText calls. This provides easy method to position precisely the text based on font/letter specific characteristics
AFL: PlotTextSetFont( "text", "fontname", pointsize, x, y, color, bkcolor = colorDefault, yoffset = 0 )
Example:

Plot(C, "Price", colorDefault ); x = SelectedValue( BarIndex() ); y = Close[ x ]; PlotTextSetFont("E", "Wingdings", 40, x, y, colorGreen, colorDefault, -30 ); PlotText( "C", BarCount, Close[ BarCount - 1 ], colorRed, colorDefault, -20 ); // will use new font too
ASCII importer: now company address can be imported ($ADDRESS <company address> command and new ADDRESS field in the $FORMAT command)
ASCII importer: NULL can be specified as date in several date fields such as delisting date, dividend date,etc. This results in date being cleared (unset).
$FORMAT TICKER,LAST_SPLIT_DATE,ADDRESS
$AUTOADD 1
$OVERWRITE 1
$NOQUOTES 1
$SEPARATOR ,
XLNX,NULL,"This is new address"
Charts: Y-axis grid can now be finer than 0.0001 (#125281) - upto 6 decimal digits (0.000001) are displayed when needed
Charts: Null values in Open/Close fields now disable drawing of open/close ticks in the bar chart (PlotOHLC function)
Plot( C, "", colorDefault, styleNoDraw ); PlotOHLC( Null, High, Low, Null, "Price", IIf( H > Ref( H, -1 ), colorGreen, colorRed ), styleBar | styleNoLabel, Null, Null, 0, 0, -100 );
UI: Last pane height does not change on window resizing after pane resize anymore.
New Analysis: in Windows 7 and 8 the progress of scan/backtest/exploration/optimization is also shown in Windows Taskbar, so it is visible even if AmiBroker window is minimized or covered by other windows
New Analysis: Backtest report settings: added option NOT to include Formula in the report (for security purposes)
New Analysis: Horizontal scroll bar is refreshed after HTML import
Prefs: Currency tab, added option "Trade using FX cash conversion" to handle different ways to calculate profits depending on whenever foreign currency is borrowed or cash actualy exchanged

When you actually exchange the cash when entering a trade on security traded in foreign currency then you should have this option turned ON
when you use a loan in a foreign currency, turn this option OFF (the pre 5.71-behavior)
See this for more info:
https://www.interactivebrokers.com/images/flash/tours/MechanicsOfForeignTransaction/index.html

CHANGES FOR VERSION 5.70.2 (as compared to 5.70.0)

Vertical selector line for the very first quote in a chart was not displayed. Fixed.
Exception could occur when passing openpos object to user-defined function. Fixed.
Deleted databases are removed on start up from that "Recent databases" menu
An exception at 678BAB24 when full name edit was incomplete and symbol was changed. Fixed.
In 32-bit version of AmiBroker, StaticVarInfo could return negative value when static memory usage was greater than 2GB. Fixed
Added extra checks in SetOption to avoid crash when user deletes symbols while formula is running (which is bad idea anyway)
On attempt to print/copy image of an empty chart pane appropriate message is displayed
State of command bars is loaded with 'silent' option to prevent "due to software update the toolbar has changed " messages that could appear when user launched AmiBroker from different folders or different versions (old and new)

CHANGES FOR VERSION 5.70.0 (as compared to 5.69.0)

GDI: use of PS_ALTERNATE style in Windows 95/98 causes resource leak. Fixed.
UI: Place Order dialog, it was problematic to enter fractional offsets for brackets. Fixed.
" Recent database" menu randomly listed files instead of databases. Fixed. Note if you have custom toolbar with "Recent database" submenu added, you need to delete it and re-insert.

CHANGES FOR VERSION 5.69.0 (as compared to 5.68.1)

Adding symbols via ASCII import caused change of selected symbols in charts. Fixed.
OLE: AnalysisDoc.Run supports Individual Optimization now (Action == 5)
Charts: when formula file can not be found the detailed information about the path referenced and current working directory is displayed instead of old "the formula can not be found - no chart to display"
New Analysis: added Auto-repeat status icon in the right-hand corner of the Info bar (yellow 'play' arrow shows up when auto-repeat is active and scheduled for next run)
AFL: Percentile() uses now new algorithm that has linear O(n) complexity instead of O(log(n)*n) so it is MUCH faster than the old one and close to Median() that uses quickselect (which is fastest)

By the way, to find average of upper and lower median for EVEN number of elements you can use
Percentile( array, range, 50 )
- it will execute approx 30% slower than Median, but Median only returns LOWER median for even 'range' parameter.
ODBC plugin: now available in 64-bit
AFL: since 5.63 round() function used 32-bit floorf which resulted in some differnces as compared to 5.60. Previous code version is restored now.
DDE plugin: 64-bit version of DDE plugin was producing incorrect timestamps. Fixed.
Default seed for Random() and mtRandom() was based on time(), which could be the same for threads created in the very same moment. Now the seed in multiple threads is guaranteed to be unique. This prevents repeated pseudo-random sequences in multiple threads created in the very same moment.
IB plugin: added support for CFDs (security type=CFD, exchange=SMART) and commodities (security type = CMDTY, exchange = SMART)

Example symbology for CFD:
IBUS500-SMART-CFD-USD
Symbol-SMART-CFD-Currency

Example symbology for commodities:
XAUUSD-SMART-CMDTY

Symbol-SMART-CMDTY-Currency
UI: Now there are separate MRU (most recently used) menus for files and databases (File->Recent Databases, File->Recent Files_)
Removed / changed some mnemonics (key accelerators) in menus to avoid duplicates
The default setting for Layers/"Auto-Select Layer" is changed to OFF.
Custom Backtester interface: added FullName read-only property to Trade object (gives full name of symbol)

You can use it for example to add full name as a custom metric to the trade list
SetCustomBacktestProc("");

/* Now custom-backtest procedure follows */
if( Status("action") == actionPortfolio )
{
bo = GetBacktesterObject();

bo.Backtest(1); // run default backtest procedure

// iterate through closed trades first
for( trade = bo.GetFirstTrade(); trade; trade = bo.GetNextTrade() )
{
trade.AddCustomMetric("FullName", trade.FullName );
}

bo.ListTrades();

}

// your trading system here

fast = Optimize("fast", 12, 5, 20, 1 );
slow = Optimize("slow", 26, 10, 25, 1 );
Buy=Cross(MACD(fast,slow),Signal(fast,slow));
Sell=Cross(Signal(fast,slow),MACD(fast,slow));
SPSO (standard particle swarm optimizer) plugin: now available in 64-bit
Tribes plugin: now available in 64-bit
DDE plugin: now available in 64-bit

CHANGES FOR VERSION 5.68.1 (as compared to 5.68.0)

fixed crash in 64-bit version when usign StaticVarGenerateRanks on large arrays
AFL: since 5.63 round() function used 32-bit floorf which resulted in some differnces as compared to 5.60. Previous code version is restored now.

CHANGES FOR VERSION 5.68.0 (as compared to 5.67.2)

AFL: new function: Error("text") - allows to display user-defined error messages and stop execution of the formula. Good for 3rd party plugin implementors to display error messages

Example:
Error("Something went wrong");
Note that error number in case of user-defined error message is always 99.
AFL: new function: StaticVarGetRankedSymbols( "outputprefix", "inputprefix", datetime )
AFL: new function: StaticVarGenerateRanks function (flexible ranking function)

NOTE: This function is NOT intended to replace bakctester's built-in ranking via PositionScore. Just the opposite: whenever you can, you should use PositionScore as it is way way faster and less memory-consuming way to perform backtests with ranking. To learn more about how to use PositionScore see "Portfolio level backtesting" section of the tutorial. StaticVarGenerateRanks is intended to be used for tasks OTHER than backtesting such as explorations or indicators that may require ranking functionality.
WARNING: this function is computationally and memory intensive. It takes about 20ms per 15K bars and 7 symbols. Try to call it JUST ONCE per scan/exploration/backtest using if( Status("stocknum")==0) or better yet, use separate scan just once to pre-calculate ranks and use it later (like composite creation scan). If you fail to do so and call StaticVarGenerateRanks for every symbol performance would drop significantly as this function not only needs lots of time to compute but it also has to lock the access to shared memory used by static variables so other threads trying to access static variables would wait until this function completes.

StaticVarGenarateRanks( "outputprefix", "inputprefix", topranks, tiemode )

"inputprefix" is a prefix that defines names of static variables that will be used as input for ranking.
AmiBroker will search for all static variables that begin with that prefix and assume that remaining part of the variable name is a stock symbol. Say you want to rank stocks by ROC (rate of change). All you need to do is to store values into static variables.
Let us say that we will use static variable names like "ValuesToSortAPPL", "ValuesToSortMSFT", and so on.

To fill input static variables you can use this loop:

for( i = 0; ( sym = StrExtract( symlist, i ) ) != ""; i++ )
{
SetForeign(sym );
Value = ROC( C, 10 );
RestorePriceArrays();
StaticVarSet( "ValuesToSort" + sym, Value );
}

Now you are ready to perform sorting/ranking. There are two modes, normal ranking mode and Top/Bottom Rank mode.
Normal ranking mode is performed when toprank argument is set to zero.

StaticVarGenerateRanks( "rank", "ValuesToSort", 0, 1224 );

In this case StaticVarGenerateRanks call would generate set of static variables starting with prefix defined by 2nd argument
each variable holding the rank of particular symbol, so in this case
RankValuesToSortMSFT will hold ranking of MSFT
RankValuesToSortAAPL will hold ranking of AAPL
Note that in AmiBroker rank count start from ZERO.

Third argument (topranks) is zero in normal ranking mode
Fourth argument (tiemode) defines how ties are ranked. Supported modes are 1234 and 1224. In 1224 mode ties are numbered with equal rank.

Example code for normal ranking mode (everything done is done in one pass, can be used in indicator):

symlist = "C,CAT,DD,GE,IBM,INTC,MSFT";

// delete static variables
StaticVarRemove("ValuesToSort*");

// fill input static arrays
for( i = 0; ( sym = StrExtract( symlist, i ) ) != ""; i++ )
{
SetForeign(sym );
Value = ROC( C, 10 );
RestorePriceArrays();
StaticVarSet( "ValuesToSort" + sym, Value );
}

// perform ranking
StaticVarGenerateRanks( "rank", "ValuesToSort", 0, 1224 ); // normal rank mode

// read ranking
for( i = 0; ( sym = StrExtract( symlist, i ) ) != ""; i++ )
{
Plot( StaticVarGet( "RankValuesToSort" + sym ), sym, colorCustom10 + i );
}

Top/bottom ranking mode (that generates top/bottom ranking tables that hold indexes to top ranking values. When topranks > 0 top ranked values are used, when topranks < 0 then bottom ranked values are used. The values are stored in variables that have format of: OutputprefixInputprefixN where N is a number 1, 2, 3 representing top/bottom ranks. Let us assume that OutputPrefix parameter is "Top" and Inputprefix parameter is ROC. In such case variable TopROC1 would hold the index of top rated value. TopROC2 would hold second top rated value, and so on.
StaticVarGenerateRanks function uses rank numbering that starts from ONE. In top ranking mode StaticVarGenerateRanks will also prepare static variable that contains comma separated list of variable names that can be used to find out which index refers to which symbol. So if TopROC1 holds 1 you would lookup first substring in TopROCSymbols variable to find out what variable (symbol) ranked at the top. Additionally StaticVarGetRankedSymbols gives easy-to-use method to retrieve comma separated list of ranked symbols for particular datetime.

Example code for top ranking mode

symlist = "C,CAT,DD,GE,IBM,INTC,MSFT";

// delete static variables
StaticVarRemove("ValuesToSort*");

// fill input static arrays
for( i = 0; ( sym = StrExtract( symlist, i ) ) != ""; i++ )
{
SetForeign(sym );
Value = ROC( C, 10 );
RestorePriceArrays();
StaticVarSet( "ValuesToSort" + sym, Value );
}

// perform ranking
StaticVarGenerateRanks( "rank", "ValuesToSort", 0, 1224 ); // normal rank mode
StaticVarGenerateRanks( "top", "ValuesToSort", 3, 1224 ); // top-N mode
StaticVarGenerateRanks( "bot", "ValuesToSort", -3, 1224 ); // bottom-N mode
// read ranking
for( i = 0; ( sym = StrExtract( symlist, i ) ) != ""; i++ )
{
Plot( StaticVarGet( "RankValuesToSort" + sym ), sym, colorCustom10 + i );
}

sdt = SelectedValue( DateTime() );
Title = "{{NAME}} -{{DATE}} - {{VALUES}} TOP: " + StaticVarGetRankedSymbols( "top", "ValuesToSort", sdt ) +
" BOT: " + StaticVarGetRankedSymbols( "bot", "ValuesToSort", sdt ) ;
New Analysis: when two Analysis windows were open and running Scan simultaneously with AddToComposite composites could get reset by scan running in second window. Fixed.
Added millisecond support to ASCII importer. Supported time format with milliseconds is HH:MM:SS.mmm (where mmm is milliseconds 000..999)
Unsettled sale proceeds were settled at the end of the day instead of the beginning of the next day. Fixed.
The message 'trade not entered because of insufficient funds' is modified to mention that it also it may not be entered because of incorrect position size specified by the user

CHANGES FOR VERSION 5.67.2 (as compared to 5.67.0)

Using more than 100 Plot() statements in one formula could cause memory corruption sometimes resulting in access violation. Fixed.
File->New->Blank chart and then clicking "View" caused exception in 5.67.1. Fixed
Low-level gfx playback engine resets colors to black pen / white background, so it does not get influenced by chart colors like labels.
GfxSetOverlayMode( 2 ) sometimes produced incorrect output in 5.67.0. Fixed.

CHANGES FOR VERSION 5.67.0 (as compared to 5.66.0)

New Analysis: Optimization continued even if there was error inside custom backtest procedure. Fixed.
Charting: a new "Warning 902 can not plot a chart in logarithmic scale as a data set contains negative value(s)" message is displayed on attempt to use log scale with negative data and the chart is plotted in linear scale instead.
UI: 'Logarithmic scale' item added to "View" menu.
Also the user can add this to View toolbar using toolbar customization (click on arrow in the "View" toolbar, "Add or remove buttons" then "View" then "Logarithmic...")
AFL: new function fdir( "wildcard", flags = 1 ) - returns comma separated directory list (like "DIR" command)
"wildcard" is a path with a wildcard pattern to match.
For example "C:\\*.*" will give you all files in C: drive, but "C:\\*.txt" will give you only files with .txt extension.
flags - controls what is returned the default is 1 - only files, 2 - only directories, 3 - both files and directories
Example:
printf("Only files:\n");
_N( list = fdir( "c:\\*.*", 1 ) );

for( i = 0; ( filename = StrExtract( List, i ) ) != ""; i++ )
{
printf( filename + "\r\n" );
}

printf("\n\nOnly directories:\n");
_N( list = fdir( "c:\\*.*", 2 ) );

for( i = 0; ( filename = StrExtract( List, i ) ) != ""; i++ )
{
printf( filename + "\r\n" );
}

printf("\n\nBoth files and directories:\n");
_N( list = fdir( "c:\\*.*", 3 ) );

for( i = 0; ( filename = StrExtract( List, i ) ) != ""; i++ )
{
printf( filename + "\r\n" );
}
GfxSetOverlayMode( mode = 1 ) did not work with "alternate background fill". Fixed.
Analysis Settings Load/Save buttons were positioned wrong in RTL (right-to-left) systems. Fixed.
AFL: CategoryCreate( "name", category ) - adds new category (currently supports only adding watchlists)
newwl = CategoryCreate( "name", categoryWatchList ) - this will add (create new) watch list with "name" (if it does not exist) or will return existing "name" watch list
newwl will hold new watch list index.

Currently only creation of watch list is supported by this function.
64-bit: Fixed crash with backtest of more than 10 million bars
64-bit: Fixed 'squeeze' problem with charts at full zoom out when more than 10 million data bars were displayed
OLE Stocks.Add and Stocks.Remove trigger resynchronization of selected indexes to avoid problems with "symbol locked" charts

CHANGES FOR VERSION 5.66.0 (as compared to 5.65.0)

32-bit and 64-bit versions now use different registry key to save list of DLLs so warning messages about non-certified 3rd party plugins are not displayed each time you switch between 32-bit and 64-bit app version anymore.
Foreign("~~~EQUITY" ) within custom backtest proc in old AA returned zero (because of change in 5.65). Fixed.
CBT: when low-level mode was used (no ProcessTradeSignals was called) ~~~Equity open interest field was not filled with number of open positions. Fixed.
When user moved default Formula path somewhere else Report charts were not generated properly. Fixed.
CBT: a new field "TransactionCosts" (equivalent to report's "total transaction costs") is now supported in the custom backtester Stats.GetValue method
ASCII importer: added DELISTING_DATE to fields available in $FORMAT command.
To import delisted symbols you may use file like this. Acceptable date formats are
YYYY-MM-DD (ISO standard) and DD-MM-YYYY (automatically detected).
Note that MM-DD-YYYY (US) is not detected because one can not automatically detect if 01-02-2003 means
february 1st or january 2nd
#
$FORMAT NAME, DELISTING_DATE
$NOQUOTES 1
$OVERWRITE 1
SYMBOL,"2012-07-0
AFL: GetFnData returned invalid value for fields DividendPayDate and ExDividendDate when they were empty (not set) in the Information window. Fixed (now Null is returned)
AFL: GetFnData now supports new field "DelistingDate"

dd = GetFnData("DelistingDate");
if( IsNull( dd ) )
printf("Security is active");
else
printf( "Delisted at" + dd + DateTimeToStr( dd ) );
Information window: added "Delisting date" field.
Delisting Date is a last day when security was available for trading due to delisting. If the security is still active the field is empty.
Information window: it was not possible to set/change Dividend Pay Date and Ex Dividend date from UI. Fixed.
Preferences window: new tab "Candles & Bars" that controls detailed appearance of candlestick and traditional bar charts

Use up/down colors - when marked bar charts use candlestick up/down color defined in the Colors tab
End cap style - controls whenever bar charts are plotted so the endings of lines are rounded, square or flat.
The difference between square and flat is that square end will plot with "square" pen and with wide pens it will plot width/2 pixels above high and below low because of pen thickness (looks good but high/lows are not precisely marked).
" Flat" means that ends terminate at exact position (so high and lows are precise), but the open/close ticks may look weird when plotted at high/low ("staircase effect")
Open/Close tick % thickness - controls the thickness of line used to plot open/close ticks. It is expressed in % of main bar thickness (default is 100%)
Open/Close tick % length - controls the length of open/close ticks. It is expressed in % of candle width which is usually half the distance between bars (but not more than 30 pixels).
The database save was triggered when opening documents using recent file list. Fixed.
Parameter window: Right mouse button double click over parameter label resets selected parameter to the default value now
AFL: PlotShapes() now has XShift parameter
Custom metric optimization target (WF tab) is now matched case-insensitive (FC#2442)

CHANGES FOR VERSION 5.65.0 (as compared to 5.64.0)

In-memory quotation cache can now be larger than 20K symbols. Now the maximum is 100K symbols (user definable in Tools->Preferences, "Data" tab). Caveat use extreme values ONLY if you have plenty of memory AND you are using 64-bit version
New Analysis: Walk-forward result list colums had "alpha" type which resulted in alphabetic sort when user clicked on column. Fixed (numeric type is used now).
QuickData did not work properly for not time-based intervals so it is now automatically turned off for charts using such intervals.
Fixed crash @0048C19A/48C1C4 (click on result list after backtest to show arrows sometimes produced this).
Trade profit calculation speeded up which results in upto 15% faster optimization with lots of trades
New Analysis: In 5.64.x "stocknum" incorrectly started counting from 1 instead of 0 as in old versions. Fixed.
Foreign/SetForeign/RelStrength of the same symbol as active does nothing (i.e. refers to already existing thread local data, instead of querying database)
New Analysis: when SetSortColumns was used in 5.63 and above it could trigger redundant multiple sorts. Now it is fixed (sort only once)
New Analysis: results are now sorted after Individual Optimization the same way as after portfolio Optimization

CHANGES FOR VERSION 5.64.0 (as compared to 5.63.0)

New Analysis: Multi-threaded Individual Optimization (experimental). Upto NumberOfCores faster. Note: no CBT and only exhaustive mode is supported as of now

The new optimizer is called "Individual Optimize" in the New analysis window and you can access it here:

Note that old "Optimize" button runs OLD (i.e. 5.60) optimizer - for comparison purposes.

"Individual Optimize" will use all available processor cores to perform single-symbol optimization.
In "Current symbol" mode it will perform optimization on one symbol.
In "All symbols" and "Filter" modes it will process all symbols sequentially, i.e.
first complete optimization for first symbol, then optimization on second symbol, etc.

Limitations:
1. Custom backtester is not supported (yet)
2. Smart optimization engines are NOT supported - only EXHAUSTIVE optimization works.

For explanation of these limitations see http://www.amibroker.com/guide/h_multithreading.html

Eventually I may get rid of limitation (1) - when I change the CBT NOT to use OLE anymore.
But (2) is probably here to stay for long.

Built-in constant are set up once and shared among all threads to save setup time (gives 10% speed up in execution of simple formulas)
Built-in constants such as colorBlack are now read-only and any attempt to overwrite such constant value results in error 55.
New Analysis, list view in scans, explorations and individual optimizations is refreshed less often to gain some speed.
In case of individual backtest / individual optimization the backtester allocates much smaller price cache (just for 2 symbols) - takes less time.
In 5.63 Bar Replay did not with "QuickData" enabled (it required View->Refresh All to start working). Fixed.
Some actions (like import of past data, split, etc) did not trigger automatic chart refresh when QuickData was enabled. Fixed.

CHANGES FOR VERSION 5.63.0 (as compared to 5.62.0)

QuickData for charts implemented. QuickData is a new feature that greatly decreases time required to prepare compressed/filtered data for real-time charts.
QuickData is turned ON by default. It can be turned off in Tools->Preferences, "AFL" tab. Do NOT turn it off however, unless you are having problems/issues.
QuickData minimizes number of required operations by analysing what has changed in the input data and re-doing compression only for changed portion. This results in significant real-time performance improvement especially on 1-minute databases having >200K bars and many charts open. With this option turned on and 6 charts open load factor can drop from above 100% to less than 1%. CPU usage drops by more than 7x (from 7% to less than 1%)
Time&Sales now supports filtering out trades and bid/ask quotes below user-defined size
Time&Sales allows to customize colors (separate color setting for trades occuring above/at ask, inside, at / below bid, etc). Right-click and use context menu to bring up "Colors..." dialog
Time&Sales now supports "Wide list" mode in addition to existing "Narrow" mode. "Wide mode" has separate columns for bid / ask data. To switch - right click on the T&S window and choose "Wide" or "Narrow" from context menu
OpenInterest field of ~~~EQUITY symbol now holds number of open positions on bar per bar basis
GetFnData() supports now "Currency" and "WebID" fields
AFL: some transcendental math functions (sqrt, sin,asin, cos, acos, tan, atan, ln, log10, etc) are 10-30% faster now.
AmiQuote 3.05: fix to "It is illegal to call out while inside message filter" error that sometimes occurred when OLE server was busy during long imports
ASCII importer: if import takes more than 5 seconds, Windows does not mark AmiBroker as "not responding" anymore
Progress indicator (for ASCII import) in the status bar is larger and works better for large files
AFL: SetSortColumns() can now be called more than once to support multiple rankings via AddRankColumn
64-bit version: Added 'highDPIaware' and "asInvoker' settings to application manifest in x64 version, to prevent file system virtualization and scaling on high-DPI screens
Added X/Y constaints for drawing tools. When you hold down "Y" key, start and end Y co-ordinates are set to equal value (with trend line it gives horizontal line). When you hold down "X" key you get perfectly vertical line (X start/end set to equal value)
When loading and saving quotation files, AmiBroker does not allocate extra memory buffer. This conserves RAM when handling large files.
64-bit version is able to load/save files larger than 2GB per symbol (more than 53 million data bars per symbol). Note that you would need to use huge amounts of RAM as using 50 million data bars requires 6GB of RAM or more for any decent performance.
WARNING: Files larger than 2GB can not be used with 32-bit version. You must use 64-bit version in order to be able to access files >2GB.
Also note that loading / saving file that has 2GB (2000MB) size on hard disk that has 100MB/second read/write speed takes over 20 seconds. Do not assume that the program hanged up only because Windows marks it as "not responding" when it is busy writing 2GB+ files. Windows would say the application is 'not responding' if it is busy reading/writing for more than 1 second.
To work with such huge files you should invest in some very fast SSD to cut down those times, with currently fastest SSD use SATA3 6GBps and this would give you theoretical maximum of 750MB per second. Still loading/saving 2GB from such high-performance drive would take 3+ seconds.
When user re-arranged tabs in the "Log" window, "Clear" and other right-menu commands used wrong tab. Fixed.
AFL: new function AddRankColumn - adds ranking column(s) according to current sort set by SetSortColumns
Filter = 1;
AddColumn( Close, "Close" );
AddColumn( Volume, "BI" );
AddSummaryRows( 31+32, 1.5 );
AddRankColumn(); // without prior sorting AddRankColumn just adds line number
SetSortColumns(-4);
AddRankColumn(); // rank according to 4th column (descending)
SetSortColumns(-3);
AddRankColumn(); // rank according to 3rd column (ascending)

CHANGES FOR VERSION 5.62.0 (as compared to 5.61.0)

AddSummaryRows now supports also flag = 32. This flag adds standard deviation row

Filter=1;
AddColumn(V, "Volume" );
AddSummaryRows( 63, 1.2 );
// add Total, Average, Min, Max, and Count and StdDev rows (1+2+4+8+16+32)=63 - with two decimal places summary rows are added at the top of the list
AddSummaryRows treated NULLs as zeros in averages. Now it is fixed and NULLs are not included in calculations.
Drawing tooltip "bars" count starts from 0 (when line is pure vertical) to match status bar X distance display. Status bar coords display is hidden once drawing is done to prevent user confusion.
Snap to price now allows snapping to Closing and Opening price, to activate snap to close hold down "C" key, to activate snap to open hold down "O" key while drawing line / moving the mouse
When "Play" button is pressed Bar replay dialog checks if Start Date is earlier than End date and displays error message if that is not the case.
Ticker box is updated with new full name if it is changed from symbol information
Per-symbol UserData fields are accessible now via GetFnData("UserData0")..GetFnData("UserData99"). This feature is for implementors of custom data plugins to allow them to expose custom data
for( i = 0; i < 100; i++ )
printf( "UserData%g %g\n", i, GetFnData("UserData"+i) );
New Analysis: In 5.61.0 Walk Forward kept old "Current symbol" until Scan/Explore/Backtest was run. Fixed
First line in "Parallel trendlines" tool is snapped to price (if the option is turned on) as normal trendline.
eSignal: now plugin supports EOD history for more than 40 years back
Charting: Copy-Paste Special allows to copy entire chart pane with various options

a) Entire chart pane (fully independent) - it creates a copy of chart pane, assigns new chart ID, creates duplicate of the formula file so parameters are independent and formula is private (not shared with source pane)
b) Entire chart pane (independent parameters, but shared formula), the same as (a) but does NOT create duplicate of the formula so it shares the very same formula file with the original pane

c) Entire chart pane (hard-wired, shared parameters, formula and drawings, same chartID) - a new pasted pane is directly hard-wired with pane being copied, so it shares the same CHART ID and every change made to it is made to the original (source) too.
Backtest report now includes 'Total transaction costs' (sum of all commissions paid)
Aux1/Aux2 fields now allow user-definable aggregation/compression mode (File->Database Settings->Intraday Settings). Available choices are last (default), first, highest, lowest, sum

CHANGES FOR VERSION 5.61.0 (as compared to 5.60.3)

When using any drawing tool X and Y distance is shown in the status bar (FC #2380)
When position can not be entered due to insufficient funds the Backtester in the "detailed mode" gives additional info such as: requested entry price, requested position size (and dollar value) and requested round lots (FC#2377)
Time&Sales column layout persists between runs now (FC #2341)
Running any #import command (including "Update US symbol list and categories") is preceeded by prompt for confirmation now
Report Explorer now supports copying selected items to clipboard (Edit->Copy), Ctrl+C (FC#2288)
Quote Editor: added "Go to selected" button that quickly scrolls to and selects the data bar marked on chart (FC#2342)
New Analysis: parameters were not reset to default values when formula was loaded. Fixed. (#2353)
New Analysis: "Add artificial future bar" option does not affect Exploration and Scan anymore (FC#2353)
Max. chart rendering time of 1000 ms when multithreaded charts are turned ON can be overriden now by registry setting. See FC#2330 for details.
Increased width of symbol combo boxes in Symbol->Merge dialog to prevent truncation of ticker names
Floating window caption is now synchronized even if it is not active (FC#2376)
eSignal: new version allows to select whenever EOD bars should report Settlement price or regular close
Change PlotShapes does NOT use "shape0", "shape1" variables anymore to prevent clashing with user-defined variables (#104931)
ASCII importer now supports $WEBID command and WEBID field in the $FORMAT command to allow importing web ID (FC#2362)
ASCII importer now supports $ISINDEX, $ISFAVORITE commands, and ISINDEX and ISFAVORITE fields in the $FORMAT command (FC#2310)
Apply To: Filter dialog takes less time to show up

CHANGES FOR VERSION 5.60.3 (as compared to 5.60.2)

When custom backtest formula was defined in separate file then report "Formula" tab shown CBT formula instead of actual system formula. Fixed.
New Analysis, when Apply to was set to "Current" then changing current symbol during optimization affected results. Fixed
New Analysis, database's time shift was applied twice in "Show current trade arrows" mode. Fixed.
Custom backtest procedure was not called when number of trades was equal zero (no trades at all). This prevented creation of custom metrics in such case. Now CBT code is called anyway.
3D optimization chart was corrupted when optimization included custom metrics. Fixed.
Corrections and updates to Users' Guide

CHANGES FOR VERSION 5.60.2 (as compared to 5.60.1)

Setup: GICS.txt file had 50102010 category incorrectly entered (without new line). Fixed.
Setup: Formats\aqgi.format file added
Scale in/out column could have thousand separator added in incorrect place. Fixed.
New Analysis: when there was no selected formula filey a number of empty items were added to the combo box. Fixed.
New Analysis: Walk-forward summary report name and from date was not reset in second and subsequent runs in the same Analysis window. Fixed.
New Analysis: if symbol did not have any quotes at all, "wait for backfill" did not wait. Fixed.
New Analysis: Exploration - a little speed up by decreased number of string reallocations in CAnalysisExploreJob::Run
Inactive Web research window did not sync with selected symbol when "sync always" was turned on. Fixed. MG #113
Filter dialog background change did not look nice on Windows XP and earlier. Turned this off in pre-Vista OSes.
eSignal: in "EOD" mode when started outside trading session a last bar could be duplicate of previous day bar. Fixed
eSignal: 64-bit plugin now correctly downloads daily (EOD) history (so mixed mode works fine too).
eSignal plugin: added support for extended intraday (to enable it use Configure: "Use extended intraday history data request")
Due to Windows "feature" dotted lines with width of 1 were printed as solid lines on a printer. Workaround (forcing width to 0) for printer implemented.
Default black chart theme is only set when no preferences file is found. If broker.prefs exists but it is stored in pre-5.52 version then white scheme is applied by default.
Charts: when loading multiple chart layout the invisible/obscured windows were not always scrolled to the end (most recent quote). Fixed.
Auto-hidden Analysis windows sometimes did not repaint properly. Fixed.
Sharpe ratio now uses floating point trade length/qty ratio instead of integer to prevent rounding.
AFL: Now OLE strings passed by reference (VT_BSTR|VT_BYREF) are accepted too.

CHANGES FOR VERSION 5.60.1 (as compared to 5.60.0)

New Analysis: when OoS test was turned OFF in advanced Walk Forward mode, it would crash at the end attempting to create summary out of non-existing out-of-sample tests. Fixed.
New Analysis: Walk-forward combined OoS equity is just concatenation of OoS steps and no scaling is applied anymore. This it little faster and prevents some boundary/roundoff conditions.
Inactive tab text color is now fixed RGB (#656565) instead of querying system COLOR_GRAYTEXT as it is too light on XP.
If you want inactive tab text to be completely black, then create registry key
HKEY_CURRENT_USER\Software\TJP\Broker\Settings\InactiveTabTextColor
with DWORD value of 0 (zero)
Instead of black (0) you may use any other RGB value of course

[HKEY_CURRENT_USER\Software\TJP\Broker\Settings]
" InactiveTabTextColor"=dword:00000000
In 5.58 and above Study() only worked in indicators, and always referred to current chart ID. It did not work in Analysis. Fixed.
ASCII import: ASCII characters above code 127 are not trimmed from the end of strings anymore.

CHANGES FOR VERSION 5.60.0 (as compared to 5.59.0)

Upgrade information: keys issued before 2011-04-13 are expired with 5.60
UI: removed unused options from Prefs/Miscelleneous page
UI: In 5.59 ticker box was not in sync with currently selected symbol on loading single-chart layout. Fixed
UI: importing custom icon image using Tools->Customize, button RMB -> Edit Image -> Import image caused change of current working directory. Now CWD is saved and restored after customization.
UI: Floating panes use themed frames now
UI: Filter settings dialog is resizable now (and static fields use proper background color)
UI: Crash could occur if the user customized Tools menu by moving "Update US stock list..." item from the very last position in the menu elsewhere. Fixed.
UI: cosmetic color changes (chart sheet tabs)
On attempt to close Analysis window that is currently running scan/exploration/backtest an appropriate error message is displayed.
New Analysis: the message "No symbols matched apply to / filtering criteria" shows up in the message bar instead of dialog, so one does not need to click OK
New Analysis: Specifying ReEntryDelay > 0 in ApplyStop rotational and raw modes caused incorrect results in second and subsequent backtests (MG#79). Fixed.
New Analysis: In 5.59 3D optimization chart - wrong 2nd axis legend was wrong (duplicate of 1st axis). Fixed.
New Analysis: In 5.58 and 5.59 smart optimizer engine was not finalized properly when user pressed "Cancel" during optimize run. Fixed.
New Analysis: error message bar text is now trimmed to 110 characters to ensure there is a place for the "Details" button
In colorCycle sequence colorRed is replaced with colorLightOrange for better visibility when displayed with red candles
In 5.58 View->Intraday->Tick turned incorrect "0-tick" interval which resulted in effective 1-second compression. Fixed.
colorDefault is now user- definable in the preferences (Colors tab) and selectable from Parameters window and associated with chart theme
Charts: Print Preview and printout had incorrect colors due to the fact that SetDCPenColor/SetDCBrushColor APIs do not work with metafiles/printers. Fixed.
Charts: In 5.59 chart could stop refreshing when it had odd number of Plot() calls combined with a couple of PlotForeign() calls and total number of items to display in tooltip/data window exceeded 20. Fixed.
Changed default Price all in one volume to color to ColorBlend( ColorRGB( 128, 128, 192 ), GetChartBkColor(), 0.5 )),
Changed default colors for charts to "Black" scheme and outline mode to "One color for entire handle and hollow up candle body"
Changed default chart layout for clean installation
Changed default appearance to VS2010 / pane tabs on bottom
Changed Bollinger band filled default color to ColorBlend( Color, GetChartBkColor(), 0.8 )
changed all price formulas shipped in setup to use colorDefault instead of colorBlack
Blank chart panes now use defined chart background color instead of white
Background of built-in dark grey theme made slightly lighter than black
ASCII import: sector names beginning with "Sector" and industry names beginning with "Industry" were not imported properly. Fixed.
aqh.format, aqd.format, aqg.format changed - removed $VOLFACTOR 0.01 previously used so volume is reported in shares not in hundreds of shares
ApplyStop( stopTypeNBar, ... ) in backtestRegularRaw / backtestRegularRawMulti/Rotational - N-bar stop exited 1 bar later than in regular mode. Fixed.
AFL: when array was passed as "amount" argument to DateTimeAdd, the results could be incorrect. Fixed.
AFL: SetChartOptions did not write chart flags in 5.5x. Fixed
AFL: GetFnData() now supports "Country" field

CHANGES FOR VERSION 5.59.0 (as compared to 5.58.0)

New Analysis: loading previously stored APX files into 5.58 resulted in ICB filter being set (instead of cleared). Fixed.
New Analysis: 3D optimization chart can also be displayed from single-parameter optimization now, without need to add dummy Optimize()
IB data plugin: CMDTY historical requests use MIDPRICE instead of TRADES
IB data plugin: Max. number of symbols increased to 1000
UI: Tools->Preferences/Charting: added setting to show (or hide) the bar number in the crosshair's X label, by default the bar number is NOT shown now (previously it was ON by default)
UI: Tools->Preferences/Charting removed setting for "'New look' charts" - now 'New look' is used always
UI: For PlotOHLC and Plot with styleCandle/styleBar tooltip and data window display OHLC data in this order (instead COHL in previous versions)
UI: Data window now displays values for all panes at once (you can turn the display of single pane back using right click menu option)
ASCII importer: added $COUNTRY command and COUNTRY field to $FORMAT command
AFL: in ROC, RSI, RSIa, TRIX, CCI, MFI, MA, EMA, Hold, BBandBottom, BBandTop, PDI, MDI, ADX, ATR, Correlation, Wilders functions 'range' parameter is now checked for > 0 and error is displayed when it is negative
Interval-locked layers did not work correctly for N-tick/volume/range intervals. Fixed.

CHANGES FOR VERSION 5.58.0 (as compared to 5.57.1)

DB: Automatic setup and update of stock symbol listing, together with sectors, industries, markets and groups (Tools->Update US symbol list and categories). This is implemented using new #import command and new ASCII importer commands (see below for the details)
UI: custom tools menu - added special internal command #import that allows to import ASCII files from local disk or even from remote (web) sources. In the Tools->Customize, "Tools" page, you can now define custom tool that uses new #import command
Command: #import
Arguments: URL to download data from
Initial dir: path to format definition file
UI: custom tools menu - when an error occurs during launching of external command appropriate error message is displayed (instead of nothing like in old versions)
DB: The support for Industry Classification Benchmark (ICB) category system added (See icb.txt file for definitions)
OLE: Stock object has new property (string): ICB (read/write)
ASCII importer: support for importing sector/industry scheme and assignments by name (new SECTORNAME and INDUSTRYNAME fields in $FORMAT command)
ASCII importer: new command $CLEARSECTORS 1 to wipe existing sector / industry structure.
ASCII importer: new $SORTSECTORS command to sort existing sector/industry structure.
$SORTSECTORS 1 - sort case sensitive, without touching sector/industry == 0 (undefined sector/undefined industry)
$SORTSECTORS 2 - sort case sensitive, all defined sectors/industries
$SORTSECTORS 3 - sort case insensitive, without touching sector/industry == 0 (undefined sector/undefined industry)
$SORTSECTORS 4 - sort case insensitive, all defined sectors/industries
ASCII importer: crash could occur if required numeric arguments for some commands were missing. Fixed.
ASCII importer: added support for ICB import: ICB field added to $FORMAT command and added $ICB command

For example ICB assignments for NYSE can be imported from this site:
http://www.nyse.com/indexes/nyaindex.csv
(to import use this format def)
$FORMAT FullName, Ticker, Skip, ICB, Skip, Skip, Skip, Skip
$SKIPLINES 2
$SEPARATOR ,
$CONT 1
$GROUP 255
$AUTOADD 1
$NOQUOTES 1
ASCII importer: numeric field data may be enclosed in double quotation marks and still properly interpreted as numbers now.
AFL: SetChartOptions did not allow to overwrite miny/maxy in 5.51-5.57. Fixed.
AFL: CategoryGetSymbols, CategoryGetName, CategorySetName, CategoryAddSymbol, CategoryRemoveSymbol, CategoryFind updated to support categoryICB (new constant = 8)
AFL: added InIcb() and IcbID() functions
AFL: Added Status("lastbartimeleftrt") - it works like "lastbartimeleft" but uses the most recent RT stream update time instead of Now(). Also added Status("lastrtupdate") - time of last RT stream update
Depends on RT plugin to deliver correct DateUpdate / TimeUpdate data.
If plugin or date source sends incorrect datetimestamps or does not send DateUpdate/TimeUpdate correctly this function will not operate properly.
Note that most data sources send weird (not current) datetime stamps on weekends. Also IQFeed plugin sends DateUpdate/TimeUpdate only inside regular trading hours
UI: Interval combo box was not updated after changing preferences / intraday / custom interval settings. Fixed.
Analysis: when optimization is stopped, Optimize() returned NON-default value when Status("action")==actionPortfolio in subsequent backtest. Fixed

CHANGES FOR VERSION 5.57.1 (as compared to 5.57.0)

When real-time quotes were streaming interval combo refreshed too often making it hard to enter new interval in 5.57.0. Fixed.
Entering custom interval in the combo did not always work correctly for floating windows in 5.57.0. Fixed.

CHANGES FOR VERSION 5.57.0 (as compared to 5.56.0)

Charts/UI: now there is a new chart interval combo box that allows to either select predefined interval OR simply type ANY interval you want without the need to define it in the preferences
Supported interval codes are:
Y - yearly, Q - quarterly, M - monthly, W - weekly, D - daily, N - day/night,
h - hourly, m -minute (note lowercase m), s - second, T - tick, R - range, V.
D, h, m, s, T, R, V intervals can be preceded by a number. So if you type 15m it means 15 minute chart,
if you type 13T it means 13 tick chart, if you type 200R it means 200R (range) chart.
If you type just a number (x) without the following letter it will treat it as x-minute chart.

Note that while AmiBroker is trying to keep layout files backward compatible, attempt to load the layout that uses 'new' interval that is not present in defined set into *old* (pre-5.57) version will result in this extra interval being replaced by simply daily chart.
Tools->Auto update quotes is now native command (not a 'custom tool' as it was)
This change was caused by the fact that custom tools menu is stored in HKEY_CURRENT_USER registry key that is shared between 32-bit and 64-bit version.
That caused that if both 32-bit and 64-bit versions were installed an unmatching bitness version of AmiQuote could be launched and that in turn
caused problems because in Windows OS 64-bit automation first calls 64-bit server and only in absense of it tries 32-bit. So if both versions were installed
only one was updated properly (the last one installed) using "Auto-update" command.
Having this command native ensures that proper bitness version is launched so 32-bit and 64-bit versions of AmiBroker can be updated with appropriate corresponding versions of AmiQuote.
Default "X grid spacing" changed to 50 (from original 60) pixels
12 hour X grid spacing replaced by 6 hour

CHANGES FOR VERSION 5.56.0 (as compared to 5.55.1)

New Analysis: A new walk-forward summary report that covers all out-of-sample steps
There were significant changes to walk forward testing made to allow summary out-of-sample report.
The most important change is that each subsequent out-of-sample test uses initial equity equal to previous step ending equity.
(Previously it used constant initial equity).
This change is required for proper calculation of all statistics/metrics throughout all sections of out-of-sample test.
Summary report shows the note that built-in metrics correctly represent all out-of-sample steps
but summary custom metrics are composed using user-definable method:
1 first step value, 2 last step value, 3 sum, 4 average, 5 minimum, 6 maximum.

By default summary report shows last step value of custom metrics UNLESS user specifies different combining method in
bo.AddCustomMetrics() call. bo.AddCustomMetrics has now new optional parameter - CombineMethod

bool AddCustomMetric( string Title, variant Value, [optional] variant LongOnlyValue, [optional] variant ShortOnlyValue , [optional] variant DecPlaces = 2, [optional] variant CombineMethod = 2 )

This method adds custom metric to the backtest report, backtest "summary" and optimization result list. Title is a name of the metric to be displayed in the report, Value is the value of the metric, optional arguments LongOnlyValue, ShortOnlyValue allow to provide values for additional long/short-only columns in the backtest report. Last argument DecPlaces controls how many decimal places should be used to display the value.

Supported CombineMethod values are:
1 first step value, - summary report will show the value of custom metric from very first out-of-sample step
2 last step value (default), - summary report will show the value of custom metric from the last out-of-sample step
3 sum, - summary report will show the sum of the values of custom metric from all out of sample steps
4 average, - summary report will show the average of the values of custom metric from all out of sample steps
5 minimum, - summary report will show the smallest value of custom metric from all out of sample steps
6 maximum.- summary report will show the largest value of custom metric from all out of sample steps

Note that certain metrics calculation methods are complex and for example averaging them would not lead to mathematically correct representation of all out of sample test.
Summaries of all built-in metrics are mathematically correct out-of-the-box (i.e. they are *not* averages, but properly calculated metrics using method that is appropriate for given value). This contrasts with custom metrics, because they are user-definable and it is up to the user to select 'combining' method, and still it may happen that none of the available methods is appropriate.
For that reason the report includes the note that explains what user-definable method was used to combine custom metrics.
New Analysis: walk forward procedure now produces detailed reports for every out-of-sample step
Enhanced backtest report: color-coding 'good' and 'bad' values in backtest report
Some of the metrics in the backtest report are color-coded.
Blue means "neutral", Green means "good", Red means "bad"
Metrics that are not colorized are always black
This color coding is of course arbitrary and should be used as guideance only.
Treat 'red' as a warning flag and advice to check the value in detail.
As of now the following metrics are colorized:
Net Profit, Net Profit % - bad < 0, good > 0
Annual Profit %, bad < 0, neutral betwen 0 and 10, good > 10
RAR % bad < 0, good > (10 / Exposure)
Avg. Profit/Loss all trades (Expectancy $) - bad < 0, good > 0
Avg Profit/Loss % all trades (Expectancy %) - bad < 0, good > 0
Max. system % drawdown - bad: dd worse than -30%, neutral: dd between -30 and -10%, good - -10% to 0%
CAR/MaxDD, RAR/MaxDD - bad < 1, neutral between 1 and 2, good > 2
Recovery factor - bad < 1, neutral between 1 and 2, good > 2
Payoff ratio - bad < 1, neutral between 1 and 2, good > 2
Report: a note added to tooltips for Sharpe ratio and UPI metrics telling where user can change risk-free rates for those metrics
Report Explorer 1.0.2 - added alternate row background color
Removed "00:00:00" time in the "date from" in the backtest report / settings page
Param window: clicking on category that had exactly same name as parameter resulted in changing parameter value. Fixed.
Analysis: all custom metrics were treated as numbers (for example got formatted with thousand separator). Now AmiBroker custom metrics of string type are treated as strings and do not get any extra formatting for the display.
Added recommendation to activate multithreading to the performance warning tooltip when multithreading is currently turned OFF.

CHANGES FOR VERSION 5.55.1 (as compared to 5.54.0)

Random characters could appear in list view clipboard copy in 5.55.0. Fixed (5.55.1).
_SECTION_BEGIN/_SECTION_END/_PARAM_VALUES appeared twice in auto-complete listbox. Fixed.
SetOption("PortfolioReportMode", x ) changed exploration columns too. Fixed. (bmg#92)
AFL: new function GetAsyncKeyState( vkey )
GetAsyncKeyState is 100% equivalent of Windows API function of the same name.
See: http://msdn.microsoft.com/en-us/library/windows/desktop/ms646293(v=vs.85).aspx
The function queries current state of keyboard keys (at the time of the call).

vkey is virtual key code to query (see table below).
The function returns 0 if key is NOT pressed and value < 0 ( less than zero) when key is currently pressed.

Example:
Plot( C, "Close", colorRed ); vk_Shift = 16; if( GetAsyncKeyState( vk_Shift ) < 0 ) Title = "Shift is pressed";

Virtual Key codes:

vk_BackSpace = 8;
vk_Tab = 9;
vk_Return = 13;
vk_Shift = 16;
vk_Control = 17;
vk_Alt = 18;
vk_Pause = 19;
vk_CapsLock = 20;
vk_Escape = 27;
vk_Space = 32;
vk_PageUp = 33;
vk_PageDown = 34;
vk_End = 35;
vk_Home = 36;
vk_Left = 37;
vk_Up = 38;
vk_Right = 39;
vk_Down = 40;
vk_PrintScreen = 44;
vk_Insert = 45;
vk_Delete = 46;

/* NOTE: vk_0..vk_9 vk_A.. vk_Z match regular ASCII codes for digits and A-Z letters */

vk_0 = 48;
vk_1 = 49;
vk_2 = 50;
vk_3 = 51;
vk_4 = 52;
vk_5 = 53;
vk_6 = 54;
vk_7 = 55;
vk_8 = 56;
vk_9 = 57;
vk_A = 65;
vk_B = 66;
vk_C = 67;
vk_D = 68;
vk_E = 69;
vk_F = 70;
vk_G = 71;
vk_H = 72;
vk_I = 73;
vk_J = 74;
vk_K = 75;
vk_L = 76;
vk_M = 77;
vk_N = 78;
vk_O = 79;
vk_P = 80;
vk_Q = 81;
vk_R = 82;
vk_S = 83;
vk_T = 84;
vk_U = 85;
vk_V = 86;
vk_W = 87;
vk_X = 88;
vk_Y = 89;
vk_Z = 90;

vk_LWin = 91;
vk_RWin = 92;
vk_Apps = 93;
/* numerical key pad */
vk_NumPad0 = 96;
vk_NumPad1 = 97;
vk_NumPad2 = 98;
vk_NumPad3 = 99;
vk_NumPad4 = 100;
vk_NumPad5 = 101;
vk_NumPad6 = 102;
vk_NumPad7 = 103;
vk_NumPad8 = 104;
vk_NumPad9 = 105;
vk_Multiply = 106;
vk_Add = 107;
vk_Subtract = 109;
vk_Decimal = 110;
vk_Divide = 111;
/* function keys */
vk_F1 = 112;
vk_F2 = 113;
vk_F3 = 114;
vk_F4 = 115;
vk_F5 = 116;
vk_F6 = 117;
vk_F7 = 118;
vk_F8 = 119;
vk_F9 = 120;
vk_F10 = 121;
vk_F11 = 122;
vk_F12 = 123;
vk_F13 = 124;
vk_F14 = 125;
vk_F15 = 126;
vk_F16 = 127;

vk_NumLock = 144;
vk_ScrollLock = 145;
vk_LShift = 160;
vk_RShift = 161;
vk_LControl = 162;
vk_RControl = 163;
vk_LAlt = 164;
vk_RAlt = 165;
vk_SemiColon = 186;
vk_Equals = 187;
vk_Comma = 188;
vk_UnderScore = 189;
vk_Period = 190;
vk_Slash = 191;
vk_BackSlash = 220;
vk_RightBrace = 221;
vk_LeftBrace = 219;
vk_Apostrophe = 222;
AFL: Status() function supports new fields "lastbarend", "lastbartimeleft", "timeshift"
Status("lastbarend") returns DateTime of the end of last bar. For example 5 -minute bar at 9:00 will have end time of 9:04:59 (works for time-based bars only)
Status("timeshift") returns database timeshift expressed in seconds
Status("lastbartimeleft") returns number of seconds to the completion of current last bar. Works for time-based bars only. Note that for proper operation this requires database timeshift to be set properly (so dates displayed on chart match your local computer time zone).
List view clipboard copy now uses regional settings decimal separator.
You can turn it off and revert to "always dot" decimal separator by creating registry key
HKEY_CURRENT_USER\TJP\Broker\Settings
DWORD value "UseLocaleForClipboard" = 0
Charting: added left- and right extend option to the rectagle drawing tool
List view date column sort was incorrect when regional settings time format was set to: H:mm:ss. Fixed.
When multithreading in charts was turned OFF, drawing tools did not work properly in 5.53-5.54. Fixed.
XYChartAddPoint does not generate error anymore when Null values are passed as X, Y co-ords. Instead it silently ignores such points (they are not plotted) and XYChartAddPoint returns FALSE (0)
AFL: new function StaticVarInfo( "varname", "field" )
StaticVarInfo( "varname", "field") - provides information about static variables
" varname" - is a variable name. It can be also a wildcard template such as "myvariable*" and then it means that AmiBroker will search for all variables beginning with
" myvariable". * character matches any string, ? matches any single character
Supported "field" values are:
" list" - returns the list of static variables
" memory" - returns memory usage in bytes (not including memory used for variable name itself)
" totalmemory" - returns memory usage in bytes (including memory used for variable name)

Example:

StaticVarSet("my_array1", Close ); StaticVarSet("my_array2", Close ); StaticVarSet("my_scalar", 12 ); StaticVarSetText("my_text", "Text123456" ); "All variables in memory: " + StaticVarInfo( "*", "list" ); " Total static var memory: " + StaticVarInfo( "*", "totalmemory"); " Only my_ variables: " + StaticVarInfo( "my_*", "list" ); " Memory 2 arrays (bytes): " + StaticVarInfo( "my_array*", "memory" ); " Memory scalar (bytes): " + StaticVarInfo( "my_scalar", "memory" ); " Memory text (bytes): " + StaticVarInfo( "my_text", "memory" );

CHANGES FOR VERSION 5.54.0 (as compared to 5.53.1)

New Analysis: "Sync chart on select" did not respect linked charts and symbol lock. Fixed.
AFL: new function XYChartSetAxis( "chartname", "x-axis name", "y-axis name" )
AFL: new function XYChartAddPoint( "chartname", "text", x, y, color )
New Analysis: Implemented XY (scatter) charts in Explorations
Example:

// XY chart coding example // This formula generates 2 X-Y scatter charts that display relationship between // final trade profit and MFE and MAE Buy = Cross( MACD(), Signal()); Sell = Cross( Signal(), MACD() ); Short = False; Cover = False; Eq = Equity( 1 ); // single-security equity this evaluates stops (if you use them) and removes extra signals Entry = Buy OR Short; EqAtEntry = ValueWhen( Entry, Eq ); Profit = 100 * ( Eq - EqAtEntry ) / EqAtEntry; // percent profit // MAE and MFE below use CLOSING equity, MAE and MFE in the report use high/low price MAE = 100 * ( LowestSince( Entry, Eq ) - EqAtEntry ) / EqAtEntry; // percent MAE MFE = 100 * ( HighestSince( Entry, Eq ) - EqAtEntry ) / EqAtEntry; // percent MAE bi = BarIndex(); Len = bi - ValueWhen( Entry, bi ); EntryPrice = ValueWhen( Entry, BuyPrice ); // if you prefer MAE/MFE using high/low price // uncomment the lines below (long only Version) MAE = 100 * ( LowestSince( Entry, Low ) - EntryPrice ) / EntryPrice ; // percent MAE using low MFE = 100 * ( HighestSince( Entry, High ) - EntryPrice ) / EntryPrice ; // percent MAE using high Exit = Sell OR Cover; dt = DateTime(); Clr = ColorHSB( Status("stocknum"), 255, 255 ); for( bar = 0; bar < BarCount; bar++ ) { if( Exit[ bar ] ) { // item text consists of two parts // first part (before \t) is a item name displayed immediatelly on XY chart // second part (after \t) is a tooltip hint text that is displayed in the tooltip // when you hover on given item // here we will only use hint text HintText = "\t" + Name()+"@"+ DateTimeToStr( dt[ bar ] ); XYChartAddPoint( "Profit vs MAE", HintText, MAE[ bar ], Profit[ bar ],Clr ); XYChartAddPoint( "Profit vs MFE", HintText, MFE[ bar ], Profit[ bar ], Clr ); XYChartAddPoint( "Profit vs trade length", HintText, Len[ bar ], Profit[ bar ], Clr ); } } XYChartSetAxis( "Profit vs MAE", "[MAE]", "[Profit]" ); XYChartSetAxis( "Profit vs MFE", "[MFE]", "[Profit]" ); XYChartSetAxis( "Profit vs trade length", "[Length]", "[Profit]" ); Filter = Exit; AddColumn( Eq, "Equity" ); AddColumn( Profit, "Profit" ); AddColumn( MAE, "MAE" ); AddColumn( MFE, "MFE" ); AddColumn( Len, "trade length" );
{{INTERVAL}} gave incorrect (unstable) results in custom n-tick/n-range/n-volume charts when used with multithreading. Fixed.
Interval(2) returned incorrect (unstable) results in custom n-tick/n-range/n-volume charts when used with multithreading. Fixed.
Preferences: Currency page was not working properly. Fixed.
Status bar look matches now appearance settings (esp. visible in VS2012 style)
Parameter window now allows to select combined styles (like styleHidden) as well as their components styleNoRescale+styleNoDraw independently
User setting for minimum pixel spacing in X grid (Tools->Preferences, "Axes / Grids") - it is recommended to keep it at default value (60 pixels), for denser grid use less spacing (minimum 30 pixels), for wider grid use more x spacing (maximum 120 pixels)
Sometimes panes did not refresh to final size when chart sheets are switched (for example - one tab has only one pane second tab has two panes). Fixed.

CHANGES FOR VERSION 5.53.1 (as compared to 5.53.0)

Trend lines and other drawing tools sometimes were blinking or disappeared in 5.53.0. Fixed
Plots with styleDashed mixed with plots using other styles could cause continuous growth of rendering time in 5.52/5.53. Fixed.

CHANGES FOR VERSION 5.53.0 (as compared to 5.52.0)

Triangle drawing tool now supports filled interiors
Vertical selector line was flicerking with RT update when more than one chart window was open. Fixed
SetChartGradientFill renamed to SetGradientFill
SetGradientFill now has 2 more arguments: baseline and baselinecolor. Allows reverse gradient chart (such as underwater equity) and 3 color gradients top->baseline->bottom
Added 2-year and 5-year x grid spacing
Gradient chart sometimes disappeared when null values were in the data set and chart was zoomed out to the maximum. Fixed.
GUI: Preferences dialog adjustments (moved "bold" checkbox in color page, removed obsolete "show vertical line" boxes in charting page, moved candlestick outline color settings from charting to color page )
styleClipMinMax interferred with styleGradient in 5.52.0. Fixed (both styles can now be used independently as well as combined together)

CHANGES FOR VERSION 5.52.0 (as compared to 5.51.2)

Chart themes implemented, featuring new look, new grid settings, new background gradient fills, predefined themes for more details see: http://www.amibroker.com/guide/h_themes.html
Charts: X-axis algorithm rewritten (now it is clearer and prevents overcrowded/unreadable X labels)
Charts: added native gradient area charts. Gradient chart is obtained using styleGradient. Upper gradient color is specified by color parameter in Plot() function, bottom gradient color is either background color or can be defined using SetChartGradientFill function. styleGradient can be combined with styleLine

Example
SetChartGradientFill( colorLightOrange, colorPaleGreen ); Plot( C, "Close", ColorBlend( colorPaleGreen, colorBlack ), styleGradient | styleLine, Null, Null, 0, -1 );
Charts: Plot/PlotForeign/PlotOHLC now adds extra parameter "width" that controls the width of the line. Positive values specify PIXEL width, negative values specify width in percent of current bar width. So for example -20 will give you dynamic width that is 20% of bar width. Example:
Plot( C, "Close", colorBlack, styleBar, Null, Null, 0, 1, -20 /* line width as percent of bar */ );
Eliminated build-up of rendering times caused by growing of MFC temporary GDI object maps in non-UI threads. Now rendering engine uses direct WINAPI calls without MFC
View->Filtering menu was disabled in 5.51.x. Fixed
Data window was not working in 5.51.x. Fixed
" Show middle lines" = "NO" causes date axis to be moved down outside visible area. Fixed.
Selector line was not working correctly in 5.51. Fixed.
Bold dotted trendline did not work in 5.51 BETA. Fixed
AFL: LinearReg/LinRegSlope/LinRegIntercept/TSF/StdError display proper error message when user passes negative (wrong) parameter
Study tooltip information now includes also number of bars between start and end of the trendline
New Analysis: saving last column layout works better
Account manager: Edit->Undo menu was missing. Fixed.
GetFnData() now supports retrieving "Address" field too
On Win98 and above drawing engine uses DC_PEN/DC_BRUSH for speed
Optimize() reduced possibility of IEEE floating point accumulation errors with steps < 1 (such as 0.01)
PlotShapes() does not plot multiple times in same x/y pos anymore - it results in faster rendering when shapes overlap (large zoom outs)

CHANGES FOR VERSION 5.51.2 (as compared to 5.51.1)

PlotShapes() rendering was slower in 5.51 than in 5.50. Fixed.
Interpretation was blank with new rendering engine. Fixed.
Charts: Quick AFL was disabled in new rendering engine causing slowdowns with > 100K bars. Fixed

CHANGES FOR VERSION 5.51.1 (as compared to 5.51.0)

fix for low-level Gfx* functions causing crash when multithreaded GDI was enabled

CHANGES FOR VERSION 5.51.0 (as compared to 5.50.5)

Charts: Multithreaded GDI implemented for super-smooth UI response and preventing GDI-intensive charts from detoriating entire UI responsiveness
Maximum rendering time limit increased to 1000ms (1sec) when multithreaded charts + GDI are enabled (allowing 2 times more complex plots without Warning 901)
64-bit only: eSignal plugin - first BETA version of 64-bit eSignal plugin (3.0.0)

CHANGES FOR VERSION 5.50.5 (as compared to 5.50.4)

Newly created chart template did not save current tab when it was not switched before saving. Fixed.
Notepad window is refreshed when it is brought back from invisible tab
AFL Code Wizard: sometimes 64-bit version of AFL wizard could hang on clicking "AND/OR" rule. Fixed (AFL Wizard 1.0.2)
Charts: Invisible Symbol-linked charts may not be properly refreshed when changing symbol (happens only when not using streaming RT source). Fixed.
OLE: AnalysisDoc.Run now supports mode =3 (individual backtest)
AFL: Equity()/Status()/GetOption used on chart referred to OLD AA settings instead of last run analysis (whenever it is old AA or new). Now uses last run analysis settings .
AFL: SetFormulaName did not work in New Analysis. Fixed.

CHANGES FOR VERSION 5.50.4 (as compared to 5.50.3)

New Analysis: "Show arrows for actual trades" sometimes used date range from old AA. Fixed
New Analysis: Individual backtest - custom metrics columns would not appear if very first symbol under test does not generate ANY trades. Fixed.
UI: when you float a maximized MDI window it becomes little smaller so it does not overlap MDI tabs.
Print/Print Preview: circle/arc/rectangle objects outside current view are properly clipped on printouts
New Analysis: When user cancelled optimization in the middle and ran backtest afterwards then this single follow up backtest could be incorrect and required another run to produce correct result again. Fixed.
When timeshift != 0 then duplicate range markers could appear at day boundary. Fixed.
Small rounding issue in ray drawing fixed
When multiple chart panes were using SetForeign on rare occassions foreign call could fail (return other symbol data) Fixed.

CHANGES FOR VERSION 5.50.3 (as compared to 5.50.2)

New Analysis: proper symbol list refresh is triggered when composites are created or user calls SetOption("RefreshWhenCompleted, True );
When settlement delay was set to zero, then interest rate setting was ignored (5.46-5.50.2). Fixed.
New Analysis: Individual backtest: setting different report mode took place only after second run / second symbol. Fixed.
Formulas: styleNoLabel is now default for all "Band" formulas (Bollinger/Keltner/Percent)
Formulas: faster version of Portfolio Equity formula
Formulas: Ichimoku cloud added
TC2K/TC2KFunds plugins updated to check Wow6432Node registry key on 64-bit installations (should avoid TC2k detection issue on 64-bit Windows)
PlotVAPOverlay did not draw the very last level line. Fixed. Also done some cosmetic tweaks.
New Analysis: Walk forward tab table did not display custom metrics. Fixed.
Ticker bar prevents from adding empty '' symbol names
Blank chart can be closed using flyout minitoolbar now
When database is empty or chart does not have properly selected symbol the information note is displayed in the chart window (instead of blank chart)
Fixed crash @7C8097FF when trying to drag drop indicator on chart when database is empty

CHANGES FOR VERSION 5.50.2 (as compared to 5.50.1)

New Analysis: If current formula is open in the formula editor it is auto-saved prior to running any Analysis (as old AA did)
New Analysis: on Backtest/Optimization current formula is saved in @LastBacktestFormula registry key so it can be referenced by Individual Equity formula
New Analysis and Old AA: HoldMinBars > 0 can now be used together with AllowSameBarExit=True Settings: 'Stops' tab: N Bar stop has priority check box state was not saved. Fixed
New Analysis: on attempt to load analysis project file that contains formula path that does not exist or is not writable AmiBroker will create the formula in the "Formulas\Imported" folder instead of not creating it at all
New Analysis: WinXP-only - RMB click column descend/ascend menus were not working due to Windows XP bug. Fixed.
New Analysis: when formula is picked from the folder that is inside current working directory, then relative path is used and stored in project instead of absolute path previously used
New Analysis: SeparateLongShortRank required proper MaxLongPos and MaxShortPos definitions in order to work. Now if they are missing defaults are applied as in old AA.
Plugins: IQFeed: added "You can't close plugin window" on attempt to close working IQFeed window.
UI: Chart tree, Layout tree in "Explorer" theme
UI: Category list now features new icons and decreased indentation
UI: Owner-draw listviews now fully implement ellipsis item truncation mechanism, but using ExtTextOut only which is 6 times faster than DrawText that Windows uses
UI: Floating non-chart windows (account/web browser/analysis) are not closed when switching layouts.
Plugins: IQFeed plugin uses new faster IQFeed API, downloads less and uses way more efficient method to backfill 1/5/15-second base time intervals

CHANGES FOR VERSION 5.50.1 (as compared to 5.50.0)

New Analysis: Individual Backtest implemented. Note that it runs with approx same speed as old AA as Individual Backtest is single threaded for reasons explained in the User's manual http://www.amibroker.com/guide/h_multithreading.html
New Analysis: toolbar icons for parameters and settings changed to avoid confusion with the icon for preferences
UI: Symbol List uses Windows 7/Vista style
New Analysis: Toolbar customization is now saved
MRU (most recently used) file menu moved to submenu and MRU list increased to 10 items
Charts: fixed small alignment problem on Y axis when using fixed (nonproportional) font
New Analysis: backtester object now has EquityArray property that returns entire equity array (not just current value).
Please note that values are filled during backtest and only after backtest is complete, all values are valid. If you call it in the middle, it will contain only "upto given point" data. Avoid abusing this function and it is costly in terms of RAM/CPU.e).
You may use
bo.EquityArray instead of Foreign("~~~Equity", "C" )
in custom backtester code.
It accesses local copy of equity in New Analysis (unlike Foreign that accesses global symbol)
New Analysis: AddToComposite with atcDeleteValues | atcEnableInPortfolio did not delete previous values. Fixed
New Analysis: "Interval" menu item in the auto-repeat group renamed to "AR interval" because some users interpreted it wrong (as periodicity)
New Analysis: OLE interface implemented

Description in the http://www.amibroker.com/guide/objects.html
Example
The following JScript example
a) opens analysis project from C:\Analysis1.apx file
b) starts backtest (asynchronously)
c) waits for completion
d) exports results
e) closes analysis document

AB = new ActiveXObject( "Broker.Application" ); try { NewA = AB.AnalysisDocs.Open( "c:\\analysis1.apx" ); // opens given analysis project file if ( NewA ) { NewA.Run( 2 ); // starts analysis (asynchronous - returns immediatelly // (0-scan, 1- exploration, 2- portfolio backtest, 4- optimization, 6-walk forward) while ( NewA.IsBusy ) WScript.Sleep( 500 ); // wait for completion NewA.Export( "test.html" ); // exporing results WScript.echo( "ended" ); NewA.Close(); // closing analysis window } } catch ( exc ) { WScript.echo( "Exception: " + exc.message ); }
Charts: more tweaks for Y axis algorithm for readability. Now in Tools->Preferences, "Charting" the user may select different grid stepping: Instead of default 1, 2, 5, 10 grid stepping, user may select to use 2.5 step instead of 2 (Use 2.5 step in Y axis)
GetFnData() supports new field "Alias" - return Alias field without need to use OLE
GetOption supports new fields: ApplyTo and Filter*, eliminates the need to use OLE for that purpose
New fields:
-"ApplyTo" - returns Analysis "Apply To" setting 0 - all symbols, 1 - current symbol, 2 - filter
- "FilterIncludeIndex", "FilterIncludeFavorite", "FilterIncludeMarket", "FilterIncludeGroup", "FilterIncludeSector", "FilterIncludeIndustry", "FilterIncludeWatchlist" - return "Include" filter settings -1 - means NOT selected (not included), >= 0 index of included category
- "FilterExcludeIndex", "FilterExcludeFavorite", "FilterExcludeMarket", "FilterExcludeGroup", "FilterExcludeSector", "FilterExcludeIndustry", "FilterExcludeWatchlist" - return "Exclude" filter settings -1 - means NOT selected (not excluded), >= 0 index of excluded category
Fix for FPU inaccurracies in range bars implemented

CHANGES FOR VERSION 5.50.0 (as compared to 5.49.2)

New Analysis: "Save" creates now a Analysis project (.apx) file that includes all settings and formula needed in single file. The file itself is in human readable XML format. When such file is loaded on somebodys' else computer it will recreate original formula if one is not present. It will warn if there is a name conflict and let you decide to keep existing formula or overwrite.
UI: File open dialog now has "All supported files" option in the "Files of type"
UI: PopupWindow is now resizable (see size gripper in the lower-right corner)
AFL: PopupWindow function has additional parameters to control width/height and flag that controls whenever popup window captures input focus
PopupWindow( "bodytext","captiontext", timeout = 5, left = -1, top = -1, width = -1, height = -1, captureFocus = True );
width = width in pixels, -1 - use default width
height = height in pixels, -1 - use default height

captureFocus - decides whenever popup window captures input focus or not

Example: popup window that does not change input focus:
PopupWindow("test", "caption", 30, -1, -1, -1, -1, False);
New Analysis: ApplyStops applied in non-regular modes are passed to 2nd phase properly now.
New Analysis: "Show current trade arrows" fixed.
New Analysis: View->Filtering menu options were not available when New Analysis was active. Fixed.
New Analysis: Standard Edition has a limit of max 2 threads per Analysis window instance.
UI: Log window clicking on error displayed AFL Editor and marked Line+1, Col+1 char position instead of proper place. Fixed
New Analysis: Errors are now displayed in a modern message bar instead of dialog box
UI: holding down Ctrl and Q keys simultaneously while AmiBroker is starting resets all menus/command bars to defaults
New Analysis: scroll bar properly works when "Walk forward" tab is active
New Analysis: Walk forward tab content can be now copied using Edit->Copy / Ctrl+C
New Analysis: when "wait for backfill" was turned on and external data source was very slow to repond (like IQFeed during backfill) subsequent calls to Status('stocknum') could give non-unique numbers. Fixed.
New Analysis: Copy to clipboard includes headers now
New Analysis: Column customization/state persistence implemented
Charts: New Y axis grid algorithm for clearer display on condensed charts
AFL: CategoryGetSymbols supports new categoryAll (all symbols in the database) and new Mode parameter
CategoryGetSymbols( category, number, mode = 0 );
Mode parameter decides what field is retrived:
0 (default value) - ticker symbol
1 - full name

Example: to get all symbols existing in the database simply call
CategoryGetSymbols( categoryAll, 0 );
to get full names of all symbols use:
CategoryGetSymbols( categoryAll, 0, 1 );
AFL: Added Warning 503. Using OLE / CreateObject / CreateStaticObject is not multi-threading friendly. See Users' Guide ""Efficient use of multithreading"" for more details.
AFL: Added ThreadSleep( milliseconds ) function. It suspends current thread for specified number of milliseconds (maximum is 100 ms). Works only from NON-UI threads. When called from UI thread the function does NOTHING and returns immediatelly. Please do NOT abuse this function. Using it may negatively impact performance.
AFL: Added StaticVarCompareExchange function. Provides atomic interlocked compare/exchange functionality

Parameters
" varname"
Specifies the name of the destination static variable. Static variable if exists must be scalar numeric type. If static variable is not initialized, the function assumes that it has value of zero.
exchange
Specifies the exchange value. Scalar numeric.
Comperand
Specifies the value to compare to the destination static variable. Scalar numeric.
Return Values
The return value is the initial value of the destination static variable. If variable did not exist, it returns zero.
The StaticVarCompareExchange function performs an atomic comparison of the "varname" static variable value with the Comperand value. If the static variable value is equal to the Comperand value, the Exchange value is stored in the static variable. Otherwise, no operation is performed.

The function StaticVarCompareExchange provides a simple mechanism for synchronizing access to static variables that are shared by multiple threads. The following examples show how to implement semaphore and critical section in AFL using StaticVarCompareExchange function:

// EXAMPLE 1 : Simple semaphore (no waiting) if( StaticVarCompareExchange( "semaphore", 1, 0 ) == 0 ) // obtain semaphore { // protected section here // Here you have exclusive access (no other threads that check for semaphore will enter simultaneously) ///////////////////////// StaticVarSet("semaphore", 0 ); // reset semaphore } else { _TRACE("Can not obtain semaphore"); } /////////////// // EXAMPLE 2 HOW TO IMPLEMENT CRITICAL SECTION IN AFL /////////////// function _TryEnterCS( secname ) { global _cursec; _cursec= ""; // try obtaining semaphore for 1000 ms for( i = 0; i < 1000; i++ ) if( StaticVarCompareExchange( secname, 1, 0 ) == 0 ) { _cursec = secname; break; } else ThreadSleep( 1 ); //sleep one millisecond return _cursec != ""; } // call it ONLY when _TryEnterCS returned TRUE ! function _LeaveCS() { global _cursec; if( _cursec != "" ) { StaticVarSet( _cursec, 0 ); _cursec = ""; } } function TimeConsumingWork() { // WARNING: the Percentile is CPU hungry as it involves lots of sorting, the loop below may take > 1 second to complete for( i = 0; i< 10; i++ ) Percentile( C, 100, 10 ); } //_TRACE("Without CS Begin " + GetChartID() ); //TimeConsumingWork(); // some time consuming calculation //_TRACE("Without CS End" + GetChartID() ); // Example usage (critical section) if( _TryEnterCS( "mysemaphore" ) ) { // you are inside critical section now _TRACE("Begin CS " + GetChartID() ); TimeConsumingWork(); // some time consuming calculation _TRACE("End CS " + GetChartID() ); _LeaveCS(); } else { _TRACE("Unable to enter CS"); }

CHANGES FOR VERSION 5.49.2 (as compared to 5.49.1)

New Analysis: added Optimize->3D Optimization chart menu
New Analysis: buttons for Portfolio Equity/Individual Equity charts added
New Analysis: Info Bar added (that duplicates some of the info that normally appears on the Info Tab). It can be turned on using Settings->Info Bar
New Analysis: Report generation is now OFF by default when running optimization/walk forward as in old AA. This gives about 0.9 sec gain per step.
New Analysis: Single-symbol optimization made faster by caching already compressed quote array on subsequent steps
New Analysis: the check for Status("StockNum") was sensitive to blanks between parenthesis, function name and string parameter. Now it is made insensitive to blanks.
New Analysis: when "Range" was "n last bars" or "n last days", Status("rangefromdate") gave date of preceding bar. Fixed.
UI: "Performance" tooltip title was not always updated on time. Fixed.
UI: "Wait for plugin" window displays progress bar with "marquee" style instead of circle of dots

CHANGES FOR VERSION 5.49.1 (as compared to 5.49.0)

New Analysis: Testing on unaligned data sometimes took longer than expected because of the work necessary to bring signals in order. Now a smart method avoids most of the memory transfers and can give 10x speedup on backtesting very long unaligned intraday data.
New Analysis: "Backtest started", "Exploration started" text in the info tab appeared twice per run (instead of once). Fixed
New Analysis: Backtest report did not include formula code. Fixed.
New Analysis: Fixed crash that could occur when running analysis with Range set to "N recent bars" and N was exceeding number of quotes.
New Analysis: Float/Normal/Close popup menu RMB menu was active everywhere in floating window instead of only caption area. Fixed.
New Analysis: Implement single-thread start when Status("StockNum") is detected in the code. Other threads are started when first symbol processing is completed.
New Analysis: Send to Analysis did not update formula combo box properly in certain scenarios: when formula X was selected, then formula Y, then formula X again. Fixed.
Old AA: status bar displays true timing for fair comparisons between old AA and new Analysis. Watching progress bar numbers was misleading as it closed before all processing was truly complete, so it looked like old AA completed sooner than it really did
UI: menu item for Old Automatic Analysis restored as apparently some users got lost. Also attempt to run old Automatic analysis displays an information about new Analysis window

CHANGES FOR VERSION 5.49.0 (as compared to 5.48.0)

New Analysis: when floating pane is made normal from/to dates were reset to today. Fixed.
New Analysis: when Apply To: Filter is defined so NO symbol matches the criteria, appropriate message is displayed when trying to run Analysis and action is terminated instead of displaying progress bar forever
New Analysis: when analysis window is "floating" double click/show arrows/sync affects active MDI chart just like old AA did, as opposed to last one (when analysis is not floating)
New Analysis: Optimization parameter setup stage uses now not more than 100 bars. This reduces setup time.
New Analysis: implemented import / export, File menu now has Import HTML and Export HTML/CSV commands
New Analysis: Implemented "Wait for backfill" option. This slows down analysis sequence so AmiBroker waits for external RT data source to deliver backfill data
When "wait for backfill" option is turned on, AmiBroker checks if data for given symbol are complete, if not, it sends request to external source to backfill the data and waits 1 second.
After one second, it checks again, it data are complete, if not, it waits another 1 second, and so on. Once data are complete given symbol is used for formula execution.
New Analysis: Custom backtester uses "last backtest settings" when calling GetStatus() instead of old AA settings
New Analysis: auto-repeat interval edit field did not allow to enter values if moved to main toolbar via customization. Fixed.
Formula Editor Analysis toolbar button now operates on New Analysis window
Default for timestamping of intraday compression changed to "Show START time of interval"
Charts: AFL error message color is now definable in Tools->Preferences, "Color" tab
Charts: Tooltips automatically display also OHL prices (in addition to close) when Plot style is set to candlestick, bar or when PlotOHLC was used
UI: Adjusted item Y offset for owner drawn listviews for consitent look with old layout of system listviews in Windows XP and earlier OSes
UI: Account, Analysis and Web research windows don't use client edge/border anymore - gives slicker / less crowded look
UI: when focus is switched to floating document window, the application menu is switched to proper context
UI: When File->Close was used on floating pane, document was closed but docking pane was not. Fixed.
UI: The toolbar button and menu option to launch old Automatic Analysis window are now hidden (can be brought back by using Tools->Customize), old AA can also be launched from new Analysis via Analysis->Old Analysis menu
UI: New menu options and toolbar button to launch new analysis window
UI: Moved all menu items controlling visibility of docking windows to "Window" menu
UI: floating state of windows can now be turned on/off using right-click menu over tab / floating window caption
UI: File->Save (when currently selected window is a chart) command now saves Chart template. To save database use "Save database" instead.
UI: Defaults for data window are changed, so extra OHL display is turned off by default as currently PlotOHLC displays all 4 prices in the tooltip and data window already
UI: Data window scroll bars are hidden and do not flicker when updating
UI: "Save All" toolbar button removed, "Save database" button added to replace it
Web Research: turned on "silent" mode - should prevent error message boxes displayed by IE engine.
QuoteEngine: Range bars algorithm improved significantly
Quote array uses 20480 bytes (512 quotes) allocation chunk size (exactly 5x4KB page) for better alignment with Windows virtual memory pages

CHANGES FOR VERSION 5.48.0 (as compared to 5.47.0)

New Analysis: custom metrics columns were invisible in backtest/optimizations. Fixed. (#91031)
New Analysis: backtest did not display proper column names when Report mode was different than trade list. Fixed. Also added support for changing report mode via SetOption().
New Analysis: Auto-repeat Scan/Explore implemented (aka. "Run every" in old AA) (use drop down menu next to "Settings" button)
New Analysis: Showing arrows by double click implemented
New Analysis: Sync chart on select option implemented (use drop down menu next to "Settings" button)
Fixed window activation issue after RMB click in chart window when non-chart floating windows are active
New Analysis: Cancelling walk-forward did not restore date range and settings and didn't reset internal step counter. Fixed.
New Analysis: Formula path disappeared when window was made floating. Fixed.
New Analysis: in 5.47 non-exhaustive optimizers sometimes stopped after first step in walk-forward. Fixed.
Charting: scroll bar zoom function remains active even at extreme zoom in levels
New Analysis: Fixed problem with opt steps warning dialog appearing sometimes in the out-of-sample tests in walk forward sequence
New Analysis: Signal heaps are separated now, allowing to run concurrent backtest/optimizations in many analysis windows
New Analysis: removed unnecessary refreshes of symbol list during optimizations that caused slowdowns when user had large database
New Analysis: The size of control fields is properly adjusted with regards to DPI
New Analysis: Status("StockNum") was always zero in 5.47 and earlier. Now it is set properly.
Caveat: be careful when you run codes that use Status("StockNum")==0 for special processing in multithreading mode.
Other threads with "StockNum" = 1, 2, 3,... will run simultaneously! If you store static variables in step 0 these variables may be empty if you access them from other parallel running threads.
Fixed Error 53 message that was giving an error when proper \" (quotation mark espace sequence) was used

CHANGES FOR VERSION 5.47.0 (as compared to 5.46.0)

New Analysis: last used ApplyTo/Range/From/to dates/filters and other settings are saved when Analysis window is closed
Fix to "slow response" problems some users reported when switching symbols
Fibonacci retracement- modifying Z-order affected only control trendline, not all lines as it should. Fixed.
New Analysis: implemented Walk-Forward testing (use drop arrow next to Optimization button)
AFL engine: new error 53: incorrect \ espace sequence. Error is issued when user forgets that single slash must be written as \\
Default title for new analysis window is "AnalysisX" (instead of "Unnamed") where X is consecutive number 1, 2..
attempt to use Say() on computer without sound card or without driver installed does not result in throwing exception/crash report, but it is rather silently ignored

CHANGES FOR VERSION 5.46.0 (as compared to 5.45.0)

New Analysis: Exhaustive multi-threaded optimization implemented
New Analysis: Smart (non-exhaustive) multi-threaded optimization implemented in a way compatible with existing optimizer plugins

Note however that due to the fact that most non-exhaustive optimization plugins are not re-entrant, AmiBroker prevents from running more than one non-exhaustive multi-threaded optimization at a time. You can however, run many exhaustive optimizations in parallel, as they don't require external plugins.
Slight modification to the way how compressed bar charts are drawn (so bars with H==L are better visible)

CHANGES FOR VERSION 5.45.0 (as compared to 5.44.1)

64-bit version compiled with new version of C runtime (Microsoft security update)
Fixed date/time column sorting in virtual list views when regional date format was different than yyyy-MM-dd
AFL: ClipboardSet() returns True (1) when clipboard has been successfully set. Sometimes clipboard is locked by another applications and then write can fail (ClipboardSet() will return zero/False then)
New Analysis: Changed alignment of Date/Time column to left in backtest result list.
Most AFL engine setup moved to worker threads. Result - smaller UI thread load in MT charts (better scalability) and much faster (upto 2x) explorations/scans in New Analysis window
New Analysis: added "Info" tab that provides some summary information about analysis (number of rows, timings, backtest summary) - contents can be copied using Ctrl+C / Edit->Copy

NOTE:
End users should only look at "Completed in... sec" line that shows actual run time of the analysis (scan/exploration/backtest).
The times shown in "timings" row are for Amibroker.com internal use. In development/testing they help us tweak the performance of various parts of analysis engine. The detailed timings do not sum up to actual run time. No further infomation is available at the moment. The "timings" row is subject to change/removal in the future versions.

If you have problems/questions with the performance of new Analysis window please copy (Ctrl+C) the contents of Info tab and send to support.
New Analysis: first-phase backtest signal processing and ranking moved to non-UI threads, enabling better parallelism, results in better backtest performance (upto 2x in with trivial codes)

CHANGES FOR VERSION 5.44.0 (as compared to 5.43.1)

New Analysis: fixed AddToComposite()
New Analysis: Interval() function was working incorrectly in new analysis window. Fixed.
New Analysis: Backtest ~~~EQUITY symbol did not have "use only local database" set in 5.43.1. Fixed.
New Analysis: Backtest performance improved by removing some unnecessary list view refreshes (now it should never be slower than old AA even with simplest formulas)

CHANGES FOR VERSION 5.43.1 (as compared to 5.43.0)

When range different than "All quotes" was selected, backtest in new Analysis window could produce incorrect results in 5.43.0. Fixed.

CHANGES FOR VERSION 5.43.0 (as compared to 5.42.0)

New Analysis Window: multi-threaded Backtest feature implemented (experimental)

Note that only first phase of backtest is multithreaded (each symbol in separate thread). 2nd phase (custom backtest) is executed in main thread as there is only one symbol to work on (i.e. equity) and it needs to talk with OLE which is single threaded and GUI.
Load/Unload buttons removed from Plugins dialog. This was developer-only feature and it was abused by ordinary people who were unloading plugins that were actually in -use (such as data plugins when being connected to given data source)
ListViews: the last line (partially shown) in RT quote window was not easily selectable. Fixed
New Analysis window: Implemented Parameters dialog
AFL: GetCursorMouseButtons() sometimes missed clicks when multithreading was on and formula took ages to execute. Now it is now 100% reliable.
Auto-selection of proper layer based on selected viewing interval
NOTE: This feature can be turned off by click with RIGHT mouse button over layers window and UNCHECKING "Auto-select layer"
IRA accounts support - implemented Settlement delay in backtester, via SetOption("SettlementDelay", x )

"SettlementDelay" option describes the number of days (not bars) it takes for sale proceeds to settle and be available for opening new positions.
SetOption("SettlementDelay", 3 ); // this will cause that proceeds from sale are only available for trading on 3rd day after sale
For detailed tracking
" Detailed log" report option now shows available and unsettled funds for T+1, T+2 and so on
Note: when using this option it is recommended to use backtestRegularRaw instead of backtestRegular, otherwise some trades may not be entered
because funds are not settled immediately and you need to be able to enter not on first but subsequent buy signals and that is exactly what backtestRegularRaw offers.

Note2: old backtester (Equity() function) ignores settlement delay
Zoom in/out toolbar buttons zoom in finer steps (+/-10%)
Analysis ListView, RMB menu new option: "Add Rank column" - adds a column with ordinal rankings based on current sort or just row number column when list is not sorted
New feature: Adding new chart/research/account/analysis via (+) tab
New Analysis window: Implemented SetSortColumns
New Analysis window: Implemented AddSummaryRows

CHANGES FOR VERSION 5.42.0 (as compared to 5.41.0)

Implemented right click menu in new Analysis windows (Add symbols to watchlist/Show arrows functionality)
Zoom in/out toolbar buttons now have auto-repeat feature
In 5.41.0 Ctrl+C from list view copied text without tabs (column separators). Fixed
In 5.41.0 did not refresh progress dialog optimization status list. Fixed. (owner draw list view initial size is retrieved in PreSubclass now)
In 5.41.0 did not display Time&Sales in reverse order (newest on top). Fixed.

CHANGES FOR VERSION 5.41.0 (as compared to 5.40.3)

New Analysis window (File->New->Analysis) - featuring multithreaded Scan and Exploration
Performance note:
to fully benefit from multithreading it is best to use AmiBroker local NATIVE database (not external)
as it is the only database that can deliver data quickly enough.
Tests show that on AmiBroker native databases scans and explorations are 100% scalable to multiple cores
- i.e. for example would run upto 8 times faster on 8 CPU/core machine.

IMPORTANT: This window is work-in-progress. Multithreaded Backtest and Optimization features will be added later.
AFL: AddColumn - added mini bar charts to explorations
Exploration now features ability to create mini bar charts in individual cells.
AddColumn has new parameter 'barchart'

AddColumn( ARRAY, "Caption", format = 1.2, fgcolor = colorDefault, bkcolor = colorDefault, width = -1, barchart = null )

'barchart' parameter accepts values from 0...100 represening percentage width of bar chart displayed in a cell
the in-cell bar chart is drawn with bkcolor (background color).

Example usage:

Filter=1;
AddColumn( Close, "Close" );
rank = PercentRank( Close, 100 );
Color = ColorHSB( rank * 64/100, 255, 255 );
AddColumn( rank, "100-day percent rank", 1.2, colorDefault, Color, -1, rank );

Note that although this example uses same value for numeric display and chart bar width, it does NOT need
to be the same, i.e. numerical value of the cell is independent from bar chart.
Totally rewritten listview with very efficient owner draw code speeds up list view scrolling/resizing/repainting more than 10 times. Native system ListView control is terribly slow on Windows XP/Vista/7 (surprisingly it was many times faster in Win9x!)
AFL: Percentile() does a param check for range > 0 now
Mini-chart in RT Quote window - Mini chart shows where LAST price is within LOW-HIGH range.
Errors and warnings are now displayed in red color in the indicator pane
During actual GDI chart rendering AmiBroker measures time and if it exceeds 500ms timeout it stops rendering with Warning 901.
This check is required because GDI rendering occurs in GUI thread and if GUI thread does not process messages for half second Windows will think that application is "not responding".
This prevents making application stuck with some overly complex, possibly incorrect formulas that call hundreds of Plot()s
Warning 502: Calling Plot()/PlotOHLC over 500 times is displayed in indicator in runtime to prevent abuse
All list views, pressing Ctrl and NumPad'+' automatically adjusts column widths to content
if data are missing in the in-memory cache, Foreign() calls from non-GUI threads use synchronous retrieval method for reliability.
This provides reliable results in AA but may slow down the multi-threaded operations if cache size is too small and user uses more Foreign() calls than in-memory cache size.
IMPORTANT:
For optimum performance in-memory cache setting (Tools->Preferences->Data) should be GREATER than number of Foreign() calls in any single formula used.
Values lower than that cause lots of disk activity and serialization of all Foreign calls that means that additional threads must wait for data retrieval to complete.
Old and new Analysis window: outputting millions of rows to listview is much faster now
All list views - Ctrl+A (Select All) made much faster

CHANGES FOR VERSION 5.40.3 (as compared to 5.40.2)

GfxTextOut produced too large text on paper / printout. Fixed.
GicsID returns empty string when GICS is not defined for symbol
PlotText: y==Null check added to skip calls that don't produce any output

CHANGES FOR VERSION 5.40.2 (as compared to 5.40.0)

64-bit version: MS VC++2005 compiler default floating point code generation option switched back to fp:precise because fp:fast produced incorrect code
Print preview and Edit->Image->Copy respect Price chart style setting
Notepad window: pressing Ctrl+C/V/X and ESC key afterwards closed AmiBroker without warning. Fixed.
Quick review: Volume is printed without using scientific notation upto 9 billion
SaveNewChartsInfo is called in SaveWorkspaceInfo() to ensure that broker.newcharts is in sync with saved layout, Broker.cpp line 927
Exception dialog "Exit program" exits program forcefully now. This prevents situation when program could not be closed and sometimes corrupted data on exit.
Selection line is handled properly again in Print preview/Edit->Image->Copy
AA / Scan outputting lots (10K+) of signals made much faster
Memory consumption during AA / Explorations reduced significantly, also multi-column explorations are much faster (10x)
64-bit version: AB x64 reverted to "Daily" setting when re-entering AA Settings dialog if user previously selected weekly/monthly/quarterly/yearly. Fixed

CHANGES FOR VERSION 5.40.0 (as compared to 5.39.0)

Fixed crash occuring when drawing object was not deselected prior to switching symbol
Added extra thread safety measure for Foreign() so it handles situation when other thread is deleting symbol while it is being accessed via Foreign()
New version (1.3) of 3D chart viewer (O3G) fixes problem with Edit->Copy image function on Vista/Windows 7 with desktop composition turned ON
Multithreading does not revert to "ON" state on startup when user turned if OFF last time (it was so in 5.34-5.39 to force testing of MT)
Temporarily removed asInvoker manifest because it created problems with 3rd party programs/plugins that are not Windows 7 compatible (QP2, FastTrack)
AFL: PercentRank( array, range ) implemented

array - input data
range - lookback range
Returns percent rank (0...100) of the current element of the array within all elements over the specified range.

A value of 100 indicates that the current element of the array is the highest for the given lookback range, while a value of 0 indicates that the current value is the lowest for the given lookback range.

It is equivalent (but 2x faster) to:

function PercentRank2( Data, Periods)
{
Count = 0;
for ( i = 1; i <= Periods ; i++ )
{
Count += Data > Ref( Data, -i );
}
return 100 * Count / Periods;
}
AFL thread termination is safer and faster now (this also eliminates randomly occuring AFL syntax errors when swithing layouts)

CHANGES FOR VERSION 5.39.0 (as compared to 5.38.0)

Lookup( array, datetime, mode = 0 ) enhanced to support mode = -2 and mode 2
mode now has following allowable values
mode = 0 - find exact match, otherwise return Null
mode = -1 - find exact match, otherwise return nearest predecesor (if datetime is past last bar it will return last bar value)
mode = -2 - find exact match, otherwise return nearest predecessor EXCEPT the very last bar (if searched datetime is past last bar it will return Null)
mode = 1 - find exact match, otherwise return nearest successor (if datetime is before first bar it will return first bar value)
mode = 2 - find exact match, otherwise return nearest successor EXCEPT the very first bar (if searched datetime is before first bar it will return Null)
GetPriceStyle() caused chart flashing when different windows had different price style selected. Fixed.
Log output/error messages from AFL engine are now passed to main window asynchronously (via PostMessage)
Chart was not refreshed immediatelly when using drag-drop on single-pane charts with non-streaming DB. Fixed
Account manager: Transactions list: "Gross value" column calculation fix.
Bar Replay dialog has now new checkbox "Reset alert time" that resets last alert time for all symbols when you press Play button enabling AlertIf() to be triggered again from the start on each replay
Fixed problem with incorrect reading of previously saved layout/template when user decreased number of chart sheets in the preferences
"Show arrows for current trade" in AA did not work with 12 hour AM/PM time format. Fixed
Fixed Lookup() function handling of end-of-day-only records and mode=0 (exact match).
Quote Editor: "Use timeshift" checkbox position wasn't adjusted when resizing dialog. Fixed.
Quote Editor was not able to edit quotes after 12:00PM when 12 hour AM/PM time format was used. Fixed
In 5.31.x BETAs syntax error message was displayed without error number. Fixed.
Fixed problem of incorrect allocation of chart value cache when window width was below 16 pixels.

CHANGES FOR VERSION 5.38.0 (as compared to 5.37.1)

Fixed structure packing in x64 version causing problems with display of parameter tooltips for 3rd party DLLs
WMA had trouble with null handling at the beginning. Fixed.
Improved CCI accuracy in x64 version (as compared to x86 version)
Added switch to turn reset chart zoom level when loading layout
Tools->Preferences, "Charting"
" Reset zoom to default when loading layout"
- by turning this ON, zoom level gets reset to default number of bars as defined in preferences for
any loaded layout, bringing old (pre-5.37) behaviour
AFL: FIR( array, coefficients, size ) implemented
This function implements general-purpose Finite Impulse Response filter (FIR)
http://en.wikipedia.org/wiki/Finite_impulse_response
The output is convolution of input aray with coefficents table (impulse response table).

The function performs automatic normalization of coefficient table if necessary (if its sum is not 1)

INPUTS:
array - input array to be smoothed
coefficients - array of FIR coefficients
size - number of coefficients ( filter_order + 1 )

It is functional (but 2+ times faster) equivalent of following AFL:

function FIR_AFL( input, coeff, size )
{
result = 0;
sumcoeff = 0;
for( i = 0; i < Min( size, BarCount ); i++ )
{
sumcoeff += coeff[ i ];
result += coeff[ i ] * Ref( input, - size + i + 1 );
}

return result/sumcoeff;
}

For example 5 bar weighted moving average can be written:
coeff[ 0 ] = 1;
coeff[ 1 ] = 2;
coeff[ 2 ] = 3;
coeff[ 3 ] = 4;
coeff[ 4 ] = 5;

FIR( Close, coeff, 5 );

Another example: ALMA which is FIR filter with shifted Gaussian coefficents can be implemented as follows:

function ALMA_AFL( input, range, Offset, sigma )
{
local m, im, s, Coeff;

m = floor( Offset * (range - 1) );
s = range / sigma;

for( i = 0; i < Min( range, BarCount ); i++ )
{
im = i - m;
Coeff[ i ] = exp( - ( im * im )/ ( 2 * s * s ) );
}

return FIR( input, Coeff, range );
}
AFL: HMA (Hull Moving Average)
HMA - Hull Moving average it is equivalent to this AFL:
function HMA_AFL( input, Range )
{
return WMA( 2 * WMA( input, int( Range / 2 ) ) - WMA( input, Range ), int( sqrt( Range ) ) );
}
AFL: new function: DateTimeAdd( datetime, amount, interval = inDaily )
The function adds specified amount of 'intervals' to input datetime array.
Allows for example to calculate datetime 5 days back or 13 months into the future
INPUT:
datetime - scalar or array - the datetime value to add to (for example returned by Now(), DateTime() or StrToDateTime/_DT or ConvertDateTime functions)
amount - number of 'intervals' to add (seconds/minutes/hours/days/etc - depending on interval parameter)
interval - specifies unit you want to add, supported units are in1Second, in1Minute, inHourly, inDaily, inWeekly, inMonthly, inQuarterly, inYearly
RETURNS:
datetime (scalar or array) - returned type depends on input

Example 1:

x = Now( 5 ) ;
printf("11 days from now " + DateTimeToStr( DateTimeAdd( x, 11, inDaily ) ) ;

Example 2 (commentary):

x = Now(5);
" now is " + DateTimeToStr( x );

for( shift = -12; shift <= 12; shift++ )
{
printf("%g seconds from now is " + DateTimeToStr( DateTimeAdd( x, shift, 1 ) ) + "\n", shift );
printf("%g minutes from now is " + DateTimeToStr( DateTimeAdd( x, shift, in1Minute ) ) + "\n", shift );
printf("%g hours from now is " + DateTimeToStr( DateTimeAdd( x, shift, inHourly ) ) + "\n", shift );
printf("%g days from now is " + DateTimeToStr( DateTimeAdd( x, shift, inDaily ) ) + "\n", shift );
printf("%g weeks from now is " + DateTimeToStr( DateTimeAdd( x, shift, inWeekly ) ) + "\n", shift );
printf("%g months from now is " + DateTimeToStr( DateTimeAdd( x, shift, inMonthly ) ) + "\n", shift );
printf("%g quarters from now is " + DateTimeToStr( DateTimeAdd( x, shift, inQuarterly ) ) + "\n", shift );
printf("%g years from now is " + DateTimeToStr( DateTimeAdd( x, shift, inYearly ) ) + "\n\n", shift );
}
AFL: new function: Lookup( array, datetime, mode = 0 )
The function searches for the bar with specified datetime and returns the value from the same position of the input array.
If exact match can not be found it returns:
Null - when mode is 0 (zero) - the default behaviour,
closest predecesor bar value - when mode is -1
closest successor bar value - when mode is 1
Example:
InputDate = "2011-04-05";
Title = "Close value at (or before) " + InputDate + " is " + Lookup( Close, _DT( InputDate ), -1 );

This function uses very fast binary search and it is many times faster than previous AFL-based methods
such as FindValueAtDateTime() presented in the past.
Any call to FindValueAtDateTime ( input, dt, value ) can be now replaced with Lookup( input, value )
(there is no need to pass dt- datetime).

NOTE: This function does not affect QuickAFL required bars, therefore it will only search bars that are actually
loaded in arrays. For indicators it may mean that it won't be able to find value if it is invisible, unless you
use SetBarsRequired() function to ensure that more bars are loaded.
AFL: function _DT( "string" ) added - this is short alias for StrToDateTime() function
AFL: added FirstVisibleValue/LastVisibleValue functions
// in charts / indicators /interpretation they return the values of array at first and last visible bars
// in other (non-indicator) modes they return array elements with subscripts of 0 and BarCount -1 respectively
// Note that these functions do not affect QuickAFL, so LastVisibleValue may be used instead of LastValue
// These functions are intended to complement functionality already available via HighestVisibleValue and LowestVisibleValue
x = C;
Plot( x, "x", colorRed );
Plot( FirstVisibleValue( x ), "fvv", colorGreen );
Plot( LastVisibleValue( x ), "lvv", colorBlue );
Cum( Null) was causing exception in AFL engine. Fixed
Print preview flickered when moving the mouse due to frequent refreshes when crosshair was enabled. Fixed.
Structured exception handler is set for every thread for better exception reporting

CHANGES FOR VERSION 5.37.1 (as compared to 5.36.0)

EncodeColor did not accept colorDefault (-1) in 5.37.0. Fixed 5.37.1.
AFL Code Wizard 1.01: fixed incompatibility with Internet Explorer 9
AFL: PlotText() internally detects if given x-coordinate is outside visible area, skips entire processing and returns zero (without plotting anything) for invisible bars. This saves execution time for inefficiently written formulas that did not check for visible bars by themselves.
Report charts now use Formula path as defined in preferences not hard-coded one so they work if user has moved his/her formula folder elsewhere
Fixed crash occuring sometimes on completly blank chart when user set number of blank (future) bars to zero (#75570)
Fixed crash when trying to use Overlay onto blank chart
AmiBroker is now marked as DPI-aware (this ensures crisp display by turning off Win7 DPI virtualization that scales and blurs image on high DPI (>=150dpi) displays)
AFL: added new message: 'Error 52. Invalid argument value. Argument must be positive (and not Null))'. The message is displayed when you pass incorrect value to a function (like Null as a range to Sum() )
Layout files now include zoom factor so charts are loaded with most recently used zoom level
Updated version of UI library featuring new appearance themes and alpha-channel resize tracker

CHANGES FOR VERSION 5.36.0 (as compared to 5.35.0)

AFL Editor more detailed code checks implemented - now displays *warnings* (for code parts that are syntactically correct but likely errorneous in practice)

Example: Warning 501. Assigment within conditional. Did you mean == instead of = ?
The warning will display if you use = (assignment operator) as a condition in
if(), while(), do-while(), and for() statements and IIf() function
The result of an = assignment statement is the value of the right-hand side of the = statement. You can use an assignment statement as a conditional test, but it is not recommended. It usually is the result of a typo where a == equality test was intended, as the following example shows:

Example:
if( x = 3 ) // x will be assigned with 3 then it is used as "true" value so condition is always met - AmiBroker will display warning 501. Assignment within conditional
{
// this if will ALWAYS be executed
}

Probably the user meant:
if( x == 3 ) // x will be compared to 3
{
// this is true conditional part
}

If you want to overcome warning 501 while still doing assigment within conditional perform a check like this:
if( ( x = 3 ) == True ) // this NOT cause warning 501
{
printf("test");
}
Temporary workaround for docking window crash when Internet Explorer 9 is installed and web research window resized
AFL: GicsID and InGICS added

GicsID( mode )
returns STRING
- gives information about current symbol GICS category
mode = 0 - returns string containing GICS code alone (such as " 15103020")
mode = 1 - returns string containing GICS category name (such as "Paper Packaging")
mode = 2 - returns string containing both code and name (such as "15103020 Paper Packaging")
InGics( "gics_code" )
- performs yes/no test if current symbol belongs to given GICS category for example
if GICS set for the symbol is 15103020
InGics("15"), InGICS("1510"), InGics("151030") and InGics("15103020") will ALL return true
but all others (like InGics("20")) will return false.

Example usage:

"GICS(0) = " + GicsID( 0 );
" GICS(1) = " + GicsID( 1 );
" GICS(2) = " + GicsID( 2 );

for( i = 10; i < 90; i+= 1 )
{
gics_code = StrFormat("%02.0f", i );
printf("In Gics '"+ gics_code + "' = %g\n", InGics( gics_code ) );
}
In minimised windows RequestTimedRefresh with onlyvisible parameter set to False worked unreliably when multithreading was ON. Fixed.
AFL engine gives more detailed information about exceptions (including line numbers and file path)
Formula editor, indicators and commentary catch all exceptions, not only system exceptions
Fixed potential crash when param dialog is referring to non-existing view (NO_CHART_ID)
AFL: "Unknown exception" should now be reported with line numbers for easier identification of ofending function
AFL: for/while/do-while loops were not executed if syntax or runtime error occured before them and "stop parsing on first error" was turned off. Fixed

CHANGES FOR VERSION 5.35.0 (as compared to 5.34.5)

AFL Editor: "firstvisiblebarindex" and "lastvisiblebarindex" are initialized with first and last data bar when using "Verify syntax" to avoid problems. Although these Status fields should only be used in indicators, it is quite common mistake among users to use them unconditionally
AFL: Sum() function displays Error 52. Invalid argument value when range argument is negative (instead of random crash)
Account manager: fixed OLE exception in date conversion occuring randomly due to uninitialized exit date when trade has been opened.
Indicator Maintenance Wizard now creates log (indmaint.log in AmiBroker directory) that reports all layout files read and eventual errors found. It also attempts to read corrupted layouts in a "safe" way so it does not crash
Parameter window: fixed handling of mixed section and section-less parameters
Quote Editor: fixed editing when timeshift was not zero plus added ability to turn on/off timeshift (so quotes can be edited in original exchange zone)
Fix: Click on items in param() window did not set focus ( fix @ line 1505 HotPropCtrl.cpp )
AFL: Error 10. Subcript out of range message now gives information about exactly which array element was accessed
AFL: Added new error message "Error 51. Array subscript has Null value"
/STACK:2097152,16384 (2M/16K) option for x64 compilation - to allow deep nesting in AFL, also reduced stack usage by Execute() function
Removed (evil) IsBadReadPtr function
OLE: AB.RefreshAll( [optional] Flags = 1 ) - takes now new optional parameter Flags. Flags = 1 means refresh only charts (fast), Flags = 3 means refresh charts, dialogs, symbol list, chart list, etc (SLOW!)
OLE: AB.RefreshAll() changed for improved consistency (marks for refresh and it is refreshed every 1 second regardless of number of requests within one second)
//--Indicator-End-- special marker is now obsolete and does nothing (entire formula is executed). For conditional execution of interpretation code use conditional statement if with Status() function
Fix: switch( str_function_call_here ) did not work properly when expression was a function call returning string such as StrLeft(). Fixed
Fix: internal time conversion (flocaltime) made thread safe using TLS
AFL: Equity() now uses thread local storage for keeping stop state variables to prevent interference when multiple threads call Equity()
AFL: mtRandom(A) now uses thread local storage, so using non-null seed yields reproducible sequence even if multiple threads are calling mtRandom in parallel
Foreign() uses SendNotifyMessage instead of PostMessage if symbol data are not already cached to trigger loading quicker (solves support #78278)
Implemented cross-thread bidirectional communication mechanism that allows to call functions across threads in safe way. This allows among other things to make non-threading safe APIs (like Quotes Plus) to operate properly with multi-threading enabled. (Fixes GetExtraData crash with QP2 - FC#2072)
Prefs/Misc/"Show interpretation in tooltips" checkbox removed as this functionality has been removed in 5.32.0. Use Interpretation window instead (View->Interpretation)
OLE: AB.Import() - UI is automatically refreshed after import so there is no need to call RefreshAll() anymore. Also the refresh is "smart" it only updates symbol lists if any symbols were added

CHANGES FOR VERSION 5.34.5 (as compared to 5.34.0)

Worked around Microsoft OS bug #248760 and #209467 - writing to metafiles from multiple threads causes lost object selections. This has caused display unstability for Gfx function-generated output. The only way to fix that was NOT to use metafiles at all. Gfx code was rewritten not to use Microsoft metafiles. As a result of custom implementation Gfx functions work now 3 times faster and are multi-threading safe.
GfxDrawText automatically falls back to much (4x) faster ExtTextOut when format is 0 or DT_NOCLIP and string does not contain any new line characters

CHANGES FOR VERSION 5.34.0 (as compared to 5.33.0)

Fix: Gfx functions when run in multithreaded mode slowed down over time due to Micosoft MFC library GDI wrappers not being thread-safe. Fixed by replacing MFC calls with straight WINAPI calls.
Multi-threading charts are now ON by default and will be reset to ON on each restart. This change is temporary but added because some people forget to turn this on.
Fix: When Symbol Lock was ON, currently focused chart did not update its quote cache. Fixed
Fix: Status("redrawaction") was giving 0 result for timed refreshes in 5.31-5.33 while it should give 1. Fixed.
Fix: GDI leak found when using Gfx* functions in Automatic Analysis that resulted in resource exception after long use. Fixed
Fix: GDI leak found after Parameter windows "Reset all". Fixed
Fix: Black screen in Edit->Image->Copy as bitmap/Metafile/Export/Send e-mail. Fixed. Now uses separate instance of AFL engine not to interfere with execution running in the background.
Fix: AFL engine did not release memory buffer for pre-processed parts (#include). Fixed
AmiBroker now has requestedExecutionLevel set to "asInvoker" in its manifest file and that prevents Vista/Windows 7 folder virtualization. It also displays a warning message when it does not have write access to its working directory.

CHANGES FOR VERSION 5.33.0 (as compared to 5.32.1)

OLE: Analysis object - added IsBusy property that allows OLE programs to check whenever AA is currently running asynchronous AA operation
In 5.32.1 only active window was refreshed automatically by streaming data - others required mouse click. Fixed.
In 5.32 formulas using Status("actionex") == actionIndicator caused blank pane when focused because actionex was NOT indicator. Compatibility shim implemented.
Fixed bad crash occuring when using AddToComposite with atcFlagsEnableInIndicator in multi-threaded mode
Fix: Interval linked charts did not update immediatelly and multi-window layouts required click to update after loading. Fixed.
Fix: Crash @501C30 when doing double right click on Data window
Dangling pointer to view (after its deletion) removed from timedrefresh map and parameter window. This prevents some crashes
Compat: In 5.32 when SetOption() was placed AFTER custom backtester procedure code in user formula - such options did not affect CBT results. Technically 5.32 was correct one and 5.30 incorrect (such options affected CBT results), but because probably too many user formulas are poorly written without taking attention on placement of SetOption() calls and that created false bug reports, an old compatible behaviour was restored till the time when error messages about wrong placement of SetOption() calls are implemented, so users become aware about their coding errors.
Bug recovery/report dialog now allows the user to type steps required to reproduce the crash and select how often given problem occurs
Attempts to run AA asynchronous operation (Backtest/Optimize/Scan/Explore) via OLE while another one is still running are detected and prevented (with error message "Automatic Analysis is Busy processing")
AFL thread termination routine checks for possible same-process COM call deadlock and pumps COM messages if necessary to complete thread gracefully

CHANGES FOR VERSION 5.32.1 (as compared to 5.32.0)

Fix: when "stop parsing at first error" option was turned on "Reset all" button in parameters window caused params to disappear. Fixed
Fix: random crash @7792E25B (small alloc heap corruption) fixed
Fix: random crash @4BFFF7 (when accessing static variables from multiple threads at once). Fixed.
Fix: Eliminated multi-threaded race condition that randomly caused blank charts.

CHANGES FOR VERSION 5.32.0 (as compared to 5.31.2)

Parameters work also without _SECTION_BEGIN/_SECTION_END, Parameters 'Reset All' operation improved
Interpretation does not use extra execution cycle anymore (text evaluation is done within normal indicator execution)
Formula Editor: Syntax check, Apply indicator, Insert work faster because it only uses 100 bars to perform syntax check instead of all bars
Formula Editor: Code check & profile uses not more than 100K bars
Fix: Timing display in the chart shows correctly AFL execution and redraw time when multi-threading is ON and does not flicker
Fix: Say() function works properly when multithreading is ON
Fix: Errors occuring in JScript/VBScript parts do not result in crash anymore
Data Window now allows to choose which of default data elements (OHLCV, OI, Aux1/2) to display - use Right click context menu
Data window display is immediate and does not require extra AFL execution
Data tooltip readout is immediate - does not use extra execution cycle anymore (implemented internal cache)
When there are no parameters for given indicator - empty brackets are not added anymore for display in tooltip/data window and as a return value of _DEFAULT_NAME().

CHANGES FOR VERSION 5.31.2 (as compared to 5.31.1)

Fixed: Problems with Gfx functions in 5.31.1
Fixed: Parameters window was not refreshed properly after ResetAll in 5.31.1
Fixed: Crash when switching layouts in 5.31.1
Fixed: Crash @004C297D - Foreign returned wrong interval in 5.31.1
Fixed: Crash @0040F91C / @0040FA2B (all references to ChartInfo removed from AFL engine) in 5.31.1
Fixed: Automatic Analysis ignored changes done via SetOption and other runtime settings-related changes in 5.31.1
Fixed: Changing chart display interval did not work immediatelly in 5.31.1

CHANGES FOR VERSION 5.31.1 (as compared to 5.31.0)

fixed crash @0040BACD (using Gfx... functions) when multi-threading was enabled
fixed crash @0041E27C (JScript/VBScript embedded code) when multi-threading was enabled
fixed crash @7686F05D and @004B83EC (load/create new database) when multi-threading was enabled

CHANGES FOR VERSION 5.31.0 (as compared to 5.30.4)

Major change: AFL Engine rewritten completely to allow multi-threaded execution

CAVEAT: this is very new code and may not be stable

This change will lead to several improvements that will be added in future versions. First public release of multi-threaded AFL engine (5.31.0 BETA) features support for multi-threading in commentary and charts.

By default multi-threaded execution in charts is disabled. To enable multi-threaded execution of charts, go to Tools->Preferences, "AFL" tab and check "Multi-threaded charts".
Note that once you turn this option on, each chart PANE will execute in separate thread, so refreshes of each pane will become completely asynchronous, non-blocking. This has quite dramatic (positive) effect on perceived snappiness of user interface.

However, there are also things you need to keep in mind. If your formulas rely on certain order of execution of panes, they may work incorrectly because generally all panes will be executing in parallel, and it depends on complexity of formula which one will finish earlier. Also a formula that is quick to execute may run several times while the other lenghty one is only finishing one run.
This has also another side effect that Foreign and AddToComposite functions when they are used in chart formulas, will operate in asynchronous way (what you write with AddToComposite may not necesarily appear instantly if you read it back right after using Foreign()), therefore it is recommended to use static variables when you need synchronized access between threads.

Since each thread uses approximatelly 1 MB of RAM for thread stack, the memory consumption when using multi-threading may be slightly larger.

There are some things that do not work properly yet when "multi-threading charts" are turned on:
- Performance meter / chart timing display do not show AFL execution times (the values reported are minimal).
- Data tooltips / Data window are still executed in main GUI thread and this in theory can lead to problems (to improve stability it is recommended to turn off price data tooltips in Tools->Preferences->Miscellaneous)
$HYBRID now allows importing OpenInterest, Aux1, Aux2 onto existing data without need to specify price
New AFL function: PlaySound( "filename" )

The function plays back specified .WAV file
returns 1 on success, 0 on failure

Example:
PlaySound("c:\\windows\\media\\ding.wav");
New AFL function: ShellExecute( "filename", "arguments", "workingdir", showcmd = 1 )

The function opens a file or runs executable.
It is equivalent of Windows API ShellExecute, with one difference, it always uses "open" verb.
This allows running executables, scripts, opening document files using their associated editors, etc.

If the function succeeds, it returns a value greater than 32. If the function fails, it returns an error value that indicates the cause of the failure.
For possible error codes, consult Microsoft documentation:
http://msdn.microsoft.com/en-us/library/bb762153(VS.85).aspx

Example:
ShellExecute("notepad.exe", "", "" );
Multiple file open dialogs now use 1MB buffer (instead of 256K)
OptimizerSetOption and OptimizerSetEngine are now no-ops for anything but backtest/optimization action

This prevents random problems when one used OptimizerSetOption or OptimizerSetEngine within indicator code.
Value labels are drawn with a little offset from the Y axis. First Plot() label is drawn with an arrow pointing out exactly price level
When main application window is in modal state (displaying File open dialog for example), RequestTimedRefresh is held
This fixes problem with file dialog changing current working directory while browsing for directory (FC #1670)
When multiple MDI windows are open and one is maximized, the windows in back that are completely obscured by others and minimized windows are not redrawn during normal RT refresh

It is worth noting that if you use RequestTimedRefresh the chart will continue to be refreshed periodically even if obscured by other windows.
If you use RequestTimedRefresh with "onlyvisible" parameter set to False, the chart will be also refreshed if it is minimized

CHANGES FOR VERSION 5.30.3 (as compared to 5.30.1)

Added GICS property to Stock OLE object
Tools->Prefs->Data "In memory cache size" upper limit was sometimes calculated incorrectly on 64 bit Windows. Now upper limit is equal to physical RAM size even if > 4GB
RequestTimedRefresh now supports sub-second (down to 0.1 sec) resolution, when enabled via registry setting (HKCU/Software/Broker/Settings/EnableHiresRTR, DWORD value = 1 )

CHANGES FOR VERSION 5.30.1 (as compared to 5.30.0)

Show arrows for actual trades does not show arrows immediately. Fixed
IB plugin: set Aux1/Aux2/OpenInt to zero
Added Gradient Price chart and Spread Chart
Default redraw time (when no charts are displayed) is set to arbitrary 0.1 sec (instead of 1 sec used previously)
Other minor fixes
Performance warning tooltip is popped up automatically only once per run unless you exceed 1000% load
Fixed access violation when refreshing "Charts" window under extreme load
PluginNotification structure is now larger - has pCurrentSINew that is a pointer to new StockInfo structure, while pCurrentSI is reverted to StockInfoFormat4 to maintain compatibility with plugins that were no rewritten using new API

CHANGES FOR VERSION 5.30.0 (as compared to 5.29.6)

When non-existing symbol is typed into "ticker" box, AmiBroker will first check if symbol with given Alias does not exist before proposing to add new symbol
AmiBroker now ensures that during writing of data and config files no other process is reading or writing to them in order to prevent possible data corruption when running multiple simultaneous instances accesing same files. In case some other process is working with given file AB will retry to access given file within next 0.25 sec and repeat four times before failing
Simple trading from the chart implemented (see "Place a buy/sell on chart" buttons in the toolbar and Insert menu) - requires installation of auto-trading interface
Possible small database reading speed enhancements via use of FILE_FLAG_SEQUENTIAL_SCAN
Parameters file (broker.params) was kept open all the time instead being closed right after reading/writing and that could cause problems. Fixed
New status bar indicator showing performance measure: percentage load factor and more info in the tooltip
Status bar information auto pop time set to 10 seconds to allow easier reading
Filling symbol combo box is speeded up
" Wait for plugin" shows up only when plugin takes more than 0.5 sec to initialize/release and uses simpler animation and does not use topmost style therefore does not cover IQFeed Connect dialog

CHANGES FOR VERSION 5.29.6 (as compared to 5.29.5)

Race condition between UI threads eliminated (resulting in "wait for plugin" window not being closed sometimes)

CHANGES FOR VERSION 5.29.5 (as compared to 5.29.2)

Sometimes when copying AA list to clipboard three dot (...) sequence appeared every 2048 characters of copied text and some characters could be missing. Fixed.
GUI: chart context window items re-arranged - 'Close' menu item moved to the bottom and 'Properties' menu item moved to top (after Parameters)
styleClipMinMax constant is now highlighted in AFL editor
When different symbol were selected in active chart and in the Symbols pane (because of filtering) operations like adding/removing from watchlist got confused. Now AmiBroker asks the user what to do.
NumToStr/WriteVal are polymorphic now (means better performance for scalar input arguments)
Aux1/Aux2 reserved variables are highligted now in AFL editor
PREV/NEXT sibling keyboard shortcut functionality restored
Added "wait for plugin" window when switching external plugin-driven databases because sometimes plugin may take long time to shutdown/initialize
New symbol bar: inability to select first symbol after new search when previously displayed was one symbol, current symbol is re-selected automatically when search string changes. In-place symbol editing disabled.
Under some circumstances when broker.master was deleted/corrupted/inaccessible AmiBroker could hang loading database. Fixed.
Cum() function does NOT use all bars any more by default.
In the past versions Cum() functions effectively turned OFF QuickAFL feature by requesting all bars to be processed.
Since Cum() function was popular it caused that many legacy formulas that used it were not benefiting from QuickAFL.
To enable QuickAFL with such formulas now Cum() function does NOT affect required bars count (previously it forced all bars).
This change may lead to different results when comparing with old versions. If you are interested in getting old behaviour and use all bars just add:

SetBarsRequired( sbrAll )

anywhere in your formula.
BarIndex() now returns values always starting from zero (even if QuickAFL is turned on).
This change is required because Cum() now does not require all bars and formulas mixing Cum(1) and BarIndex would work improperly otherwise.
Due to operating system changes in Vista and Windows 7, structured exceptions like address violations were not handled properly by exception handler and caused immediate program exit. Fixed.
Status() function new fields
Status can now retrieve "quickaflfirstdatabar" and "quickafllastdatabar".
This feature is for internal use only.
These are bar indexes of actual underlying compressed quotation array that make up AFL's array[ 0 ] and array[ BarCount - 1]
Crash report now properly lists Windows Vista (OS 6.0) and Windows 7 (OS 6.1)
Crash recovery window now sends bug reports directly over http (WWW) protocol instead of relying on clients' MAPI email program as on Windows 7 e-mail program is no longer installed by default.

Improved crash recovery should also be able to catch exceptions in more (all?) cases.
New direct send in future will offer immediate resolution to problem once given exception is identified and entered into database.
Privacy:
Direct bug reporting allows to send bug report to amibroker.com on user request (click on "Send report" button).
It works over regular http (www) port 80, and sends only the information displayed explicitely on screen
(i.e. AmiBroker version, OS version, crash information, database info (number of symbols) and machine info (memory figures)).
No other information is sent. The user has option to send anonymously (without providing e-mail address). Although e-mail
address is optional, it is recommended to provide one if user wants to receive e-mail response to the error report.

CHANGES FOR VERSION 5.29.2 (as compared to 5.29.0)

Some issues with datestamps (including wrong montly compression) were introduced by change to EOD markers done 5.29.0. Reverted/fixed.
New symbol window is properly filled with categories even if not initally visible
New symbol window category/list panes can be resized now
GetPlaybackDateTime did not return zero when playback was not active in 5.27-5.29. Fixed.
When plugins used InfoSite.AddStock (old one) more than once per symbol certain category assignments could be improperly set in 5.27..5.29.0. Fixed.
Added fopen()/fclose() tracking and error message (Error 51) when user forgot to close files. On such error files are automatically closed by AB

CHANGES FOR VERSION 5.29.0 (as compared to 5.28.1)

ASCII importer: added GICS support

Now you can import GICS symbol-code assignments using ASCII importer.
$FORMAT command now supports GICS code
and there is $GICS command for single-symbol files.
For example if your file looks as follows:
(format is symbol, full name, gics sub industry code)
AAN,AARON'S INC,25504060

Then to import it usign AmiBroker's import wizard use the following
$FORMAT Ticker,FullName,GICS
$OVERWRITE 1$
$SEPARATOR ,
$CONT 1
$GROUP 255
$AUTOADD 1
$NOQUOTES 1
Fixed loading of old AA settings so Chart dimensions are initialized with (500,300) instead of zero
Trade.EntryDateTime, Trade.ExitDateTime were reporting values incompatible with DateTimeToStr in 5.27/5.28. Fixed
Fixed assertion in Import Wizard (refering to non-existing combo box)
A blank chart timing is now set to arbitrary value of 10ms
All numeric edit fields in AmiBroker now display numbers in regular (non-scientific) notation upto 10^15 and max available precision (7 significant digits in case of single-precision IEEE)
ASCII importer: removed 2^31 cap on volume field and removed some (int) conversions that were left from old days
Implemented protection against re-entrant WM_PAINT messages sent by Vista and Win7 during COM calls
New symbol list is repainted immediately after some changes now.
Quote Editor in 5.28 editing EOD records caused creation of duplicates. Fixed.
When converting from old database format, Aux1/2 fields are initialized with zero instead of some random values.
When focus was inside new symbol window, accelerator keys did not work in 5.28. Fixed

CHANGES FOR VERSION 5.28.1 (as compared to 5.28.0)

Re-based DLLs included to increase contiguous virtual memory space
" Index" category was showing nothing in a new symbol window. Fixed.
Quote Editor - multiple quote deletion was not possible in 5.27/5.28.0, only first selected item was deleted. Fixed
Right-click beyond last symbol in the symbol list in a new symbol window caused crash in 5.28. Fixed.
Changed the way in DateTime() values are coded to support legacy formulas that are not using currently recommended comparision method via DateTimeDiff()
OLE: ZoomToRange() method works for floating windows
ADK: Added GetDateTimeArray to site interface

GetDateTimeArray returns a pointer to internal date time array. Array of DATE_TIME_INT elements.
The SiteInterface structure now looks as follows (struct size = 40 on 32-bit platforms, 76 on 64-bit platforms)

struct SiteInterface
{
int nStructSize;
int (*GetArraySize) (void);
float * (*GetStockArray)( int nType );
AmiVar (*GetVariable) ( const char *pszName );
void (*SetVariable) ( const char *pszName, AmiVar newValue );
AmiVar (*CallFunction) ( const char *pszName, int nNumArgs, AmiVar *ArgsTable );
AmiVar (*AllocArrayResult) (void);
void * (*Alloc) (size_t nSize);
void (*Free) (void *pMemory);
DATE_TIME_INT* (*GetDateTimeArray) (void);
};
In 5.27/5.28 DateTimeConvert function returned incorrect datenum. Fixed
New symbol list supports selection via typing few first letters (like symbol combo)
When saved Automatic Analysis settings contained some garbage data in MaxLongPos/MaxShortPos parameters the backtester could exit with "Not enough memory" error. Fixed

CHANGES FOR VERSION 5.28.0 (as compared to 5.27.3)

GICS is now available as Filter category (in Automatic Analysis, Quick Review and DB Purify)
Completely redesigned Symbol window (View->Symbol)
New symbol window now features:
a) separate category/filter view
b) full text search with category filtering
full text search works in two modes:
- simple substring search (enter the text into "<search>" edit and
it will find all symbols that contain search phrase in either symbol or full name (anywhere, not just at the beginning)
- wildcard search (if you enter the search phrase with either * or ? wildcards
AmiBroker will perform wildcard search. For example ??? will return only 3-character symbols, and *-A0-FX - will return all forex symbols on eSignal database. Please note that search feature operates on symbols PRESENT in the AmiBroker database, it will not find symbols that do not exist in the AmiBroker database yet but are generally accessible after importing/adding them.
c) sorting by symbol or by full name
d) GICS support
e) hierachical filtering (if you select sector from category view it will show symbols
belonging to all industries within given symbol)
f) multiple selection of symbols (hold down CTRL key while selecting, or SHIFT to select groups)
allowing watchlist/favorite operation on multiple symbols at once
g) super-fast operation (all filtering/search/display takes less than 0.01 sec with 10000 symbols)
Quote Editor Aux1 field was overwritten with value of Aux2 field. Fixed
Quote Editor column layout/width is saved between sessions (again)
N-second custom intervals can now be defined in Tools->Preferences->Intraday
GICS categorisation
AmiBroker now reads GICS.txt file from its installation folder.
It contains GICS categories listed one by one in order of GICS code in the following format
GICS;Name;Description<CRLF>
GICS is numeric code from 2 digits upto 8 digits
Name is GICS category name
Description is GICS category description
These fields must be separated by semicolon
< CRLF> means carriage return/line feed characters (means "new line" - just press ENTER/RETURN key if you are editing with text editor)

There must be only one category per line in GICS.txt file

The default GICS.txt file is supplied already.
Added support for GICS to AFL

There is a new constant : categoryGICS that works
in conjunction with category functions like
CategoryGetSymbols
CategoryGetName
CategorySetName
CategoryAddSymbol
CategoryRemoveSymbol
CategoryFind
Note that these functions take index parameter, but the meaning of index parameter is different for GICS category - the index for categoryGICS is actually GICS code. Such as 10 for energy sector or 351010 for "Health Care Equipment & supplies" industry.
The codes are fixed even if new classifications are added at some point in the future. This means that you won't need to change AFL codes even if new classifications are added. But it is important to understand that these codes work in hierarchical way. So
GetCategorySymbols( categoryGICS, 10 ) will return all symbols belonging to energy sector, including those in 10101010 - Oil & Gas Drilling sector as well as 10102050 - Coal & Consumable Fuels; for example.
See
http://en.wikipedia.org/wiki/Global_Industry_Classification_Standard
for more details on GICS system

NOTE: current databases DO NOT have GICS codes assigned to symbols.
As far as I know PremiumData http://www.premiumdata.net/ is planning to release AmiBroker-compatible database with GICS support.

CHANGES FOR VERSION 5.27.3 (as compared to 5.27.2)

HighestSince/LowestSince ignored very first bar [0] in the array. Fixed
Stock object date fields can be set to "empty" by assigning zero.
Aux1,Aux2 added to Import Wizard comboboxes
View->Data window is now present in Customization dialog
Weekly chart was not displayed if settings were to show first date of week and first date was before 1970. Fixed.
Added DateTimeDiff( arg1, arg2 ) AFL function that returns difference in seconds between two date time arguments
It is important to understand that DateTime is not a simple number but rather bitset and two datetime values can only
be reliably compared for equlity or inequality using == or != operators. Any other comparisions (less than/greater then)
using normal operators > < can lead to wrong results, therefore to compare two datetime numbers you should use
DateTimeDiff( arg1, arg2 ) which will return positive values if arg1 > arg2 and negative values if arg1 < arg2.
Symbol->Quote Editor now uses fully virtual mode - it does not require extra memory and shows up immediatelly and works fast regardles of number of quotes per symbol and is auto-refreshed every 5 sec
eSignal plugin does not fill AuxData with random data (they are initialized with zero now)
Fixed DateTimeToStr and StrToDateTime
Fixed crash when saving symbols that had name() longer than 32 characters

CHANGES FOR VERSION 5.27.2 (as compared to 5.27.1)

Fixed 16-character name problem in Metastock plugin
Fixed monthly compression problem present in 5.27.1
Fixed problem when OLE automation was used to modify symbol properties on OLD format databases without saving them first in new format
Aux1 and Aux2 are new built-in AFL price arrays
Fixed Text tool bug (Vertical text instead of horizontal in 5.27.1)
'Avg' field compression with TimeFrameSet fixed.
Added AUX1 and AUX2 to ASCII importer field definitions
Auxilliary data fields writable by AddToComposite field "1" (aux1), and field "2" (aux2)
Quotations object added new method: long RetrieveEx(long Count, VARIANT* Date, VARIANT* Open, VARIANT* High, VARIANT* Low, VARIANT* Close, VARIANT* Volume, VARIANT* OpenInt, VARIANT* Aux1, VARIANT* Aux2);
Aux1/Aux2 available as properties of Quotation object (OLE interface)

CHANGES FOR VERSION 5.27.1 (as compared to 5.27.0)

Fixed incorrect year when importing intraday data using ASCII importer
Fixed intraday filtering issue that occurred for auto-converted databases
Market ID was not properly set in 5.27.0 alpha

CHANGES FOR VERSION 5.27.0 (as compared to 5.26.5)

changed core data structures to support the following
- 64 bit date/time field with date range of 4095 years and resolution down to microseconds
- floating point volume and open interest fields
- two new auxilliary data fields per bar (internally, not yet exposed)
- 100 new user-defined fundamental data fields (internally, not yet exposed)
- support for GICS (internally, not yet exposed)
- upto 48 character length in Symbol/Alias/WebID fields
Updated plugins for eSignal, IQFeed, Interactive Brokers, Quotes Plus, Metastock to support floating point volume/open int and 64 bit date/time
Metastock plugin now reads long symbol description
Symbol lock fixed (does not interfere with Interval linking)
Added simple "BackupAB.exe" to backup entire AmiBroker folder after installation to prevent data in old format.

CHANGES FOR VERSION 5.26.5 (as compared to 5.26.0)

Symbol lock on per-chart window basis (available via padlock button next to chart sheet tabs and chart context menu)
User interface dialogs now use MS Shell Dlg 2 (Tahoma) font on Windows 2000, XP, Vista and Windows 7
several minor fixes for 64 bit version

CHANGES FOR VERSION 5.26.0 (as compared to 5.25.0)

Implemented user-definable report charts

Now it is possible for the user to create any number of charts that will be automatically generated and included in the backtest report.
To add user-defined chart to the report, simply save your chart formula under "Report Charts" folder.

That's all.

Any formula present in the "Report Charts" folder will be executed after completion of the backtest using ~~~EQUITY as selected symbol.

The beta ships with 3 sample charts:
a) portfolio equity
b) underwater equity (drawdown)
c) profit table

The charts are displayed in alphabetical order (using file name as a chart name).
Built-in price arrays (OHLC, V, OI, Avg) are protected against assigning the value of wrong type (non-array)

CHANGES FOR VERSION 5.25.0 (as compared to 5.24.0)

StaticVarGet() now has additional parameter - align

StaticVarGet("varname", align = True );
second parameter - 'align' - booleand True/False, default: True
- decides whenever AmiBroker performs timestamp synchronization/alignment or not.

The default value is True and it means that values stored in static variables
are retrieved and aligned to currently selected symbol data/timestamp
on each bar basis so data for corresponding date/time stamps match.
This is recommended setting and this is the way it worked in previous versions.

When align is switched to False - it means that AmiBroker does not perform
any checks nor any alignment and will fill the array with consecutive values
stored in static array regardless of their timestamps.
If there are less bars in the static array than in the current arrays, the last
value of static array will be propagated till BarCount - 1.

It is advised NOT to use align=False, unless you know exactly what you are doing
and you are aware that date/time stamps have no meaning in particular variable
or in case when date/time stamps are are aligned using your own method.

Note that speed difference between align 'on' and 'off' is usually negligible
because alignment algorithm is very fast and has similar complexity as plain
memory copy.
AFL: HighestVisibleValue( array ), LowestVisibleValue( array )

Two new functions that calculate single value (not array) representing
highest and lowest values of given array within VISIBLE range (on chart).
Should be applied only in indicators as only indicators have concept of "visible" bars.
The function will return Null value if no visible bars are present.
They are equivalent to the following coding:
function HighestVisibleValueEquivalent( array ) { bv = Status("barvisible"); Hh = -1e8; for( i = 0; i < BarCount; i++ ) { if( bv[ i ] AND array[ i ] > Hh ) Hh = array[ i ]; } return hh; } function LowestVisibleValueEquivalent( array ) { bv = Status("barvisible"); ll = 1e8; for( i = 0; i < BarCount; i++ ) { if( bv[ i ] AND array[ i ] < ll ) ll = array[ i ]; } return ll; }

As you can see the AFL equivalent is simple, but native functions
are faster.
When user picks a drawing tool, AmiBroker offers switching to default layer (0) if current layer is not visible
StaticVarRemove("varname") now supports wildcards in the variable name

"varname" parameter can be either exact variable name or wildcard match string.
The '*' matches any number of characters, including zero characters. The '?' matches exactly
one character.
Example 1:

StaticVarRemove("MyVariables*");
// this will remove all static variables beginning with MyVariables prefix.
Example 2:

StaticVarSet("DifferentName", 1 ); printf( "Total static variables = %g\n\n", StaticVarCount() ); for( i = 1; i <= 5; i++ ) for( j = 1; j <= 5; j++ ) { VarName = "Test_X=" + i + "_Y=" + j; printf("Setting variable " + VarName + "\n" ); StaticVarSet( Varname, 1 ); } printf( "Total static variables = %g\n\n", StaticVarCount() ); printf( "Now wildcard remove *X=1*\n" ); StaticVarRemove( "*X=1*" ); printf( "Total static variables = %g\n\n", StaticVarCount() ); printf( "Now wildcard remove Test*\n" ); StaticVarRemove( "Test*" ); printf( "Total static variables = %g\n\n", StaticVarCount() ); printf("Removing 'differenname' variable\n"); StaticVarRemove("DifferentName" ); printf( "Total static variables = %g\n\n", StaticVarCount() );
StaticVarCount function added - returns the total number of static variables in memory
Study() function now allows to specify which Y scale to use (Study( studyid, chartid, scale = -1))

Study( studyid, chartid = 1, scale = -1 )
scale parameter specifies which scale should be used
scale = -1 : automatic (default value) - either linear or logarithmic depending on actual chart setting, chart is specified by chartID
scale = 0 : linear scale
scale = 1 : logarithmic scale
data and optimizer plugins are loaded later (saves upto 15MB of RAM)
Fixed GetChartBkColor function
" show trading arrows" feature optimized for significantly lower CPU usage
hi-density (>2x more data bars than pixels) variable color styleHistogram charts are plotted with correct colors
less reallocations in real-time mode, 10% performance improvement and less fragmentation
arrays for storing dynamic stop levels are only allocated/filled when needed (saves about 10% of AFL setup time)
Added miny/maxy parameters to SetChartBkGradient (allows gradient area charts in combination with cloud style)

Example Gradient Area chart:

function PlotGradientArea( array, caption, ColorTop, ColorBottom ) { bkclr = GetChartBkColor(); HH = HighestVisibleValue( array ); if( NOT IsNull( hh ) ) SetChartBkGradientFill( ColorTop, ColorBottom, bkclr, Null, HH ); Plot( array, Caption, ColorBlend( ColorBottom, colorBlack ) ); PlotOHLC( HH, HH, array, HH, "", bkclr, styleNoLabel | styleNoTitle | styleCloud, Null, Null, 0, -10 ); } _SECTION_BEGIN("Price"); SetChartOptions(0,chartShowArrows|chartShowDates); _N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) )); PlotGradientArea( C, "Close", ParamColor("Top", colorLightOrange), ParamColor("Bottom", colorPaleGreen ) ); _SECTION_END();

CHANGES FOR VERSION 5.24.0 (as compared to 5.23.0)

typeof() incorrectly returned compile-time type instead of run-time type. Fixed.
Static array variables implemented

StaticVarSet( name, value ) and
StaticVarGet( name )
AFL functions now accept arrays in addition to numbers (scalars).
Static arrays can be even 100 faster than AddToComposite/Foreign, however these two are not strictly equivalent.
There are following limitations / differences of static arrays as compared to Foreign/AddToComposite:
a) static array variables store only as many bars as there are currently in use by given chart
(so they do not affect QuickAFL in any way). This is different that AddToComposite that forces usage and store of all bars.
b) static array variables work best if you read them using the same interval as they were written to. I.e when you create static array variables using 5-minute chart, for best results read them in some other 5-minute chart. Reading in different intervals is possible, but subject to limitations
of timestamping (see below)
c) when you read static variable in a different interval that it was originally stored,
static variables perform padding/synchronization and time compression/decompression automatically in a similar way as foreign,
however Foreign compresses data always from base-time interval, while static variables operate on previously stored interval,
hence result may differ. For example, if previously stored data was in daily interval, and you read such static variable in intraday
chart, you will see essentially flat lines for each day, representing static data from daily interval.
d) static array variables do not work well for non-time based intervals (tick/n-volume/n-tick) because timestamps in those intervals
may not be unique (i.e. several bars may have same time stamp), so time synchronization is not reliable.
e) static array variables are little slower than normal AFL variables, so for best performance, use read-once, write-once paradigm, using
temporary normal variable for any processing during formula execution, like this:
// start of the formula:
temp = StaticVarGet("mystaticarray" );

// now perform all necessary calculations using temp variable

temp = Nz(temp) + C/2;
...

// at the end of the formula store to static
StaticVarSet("mystaticarray", temp );

CHANGES FOR VERSION 5.23.0 (as compared to 5.22.0)

Font used by progress window, string input, tip of the day, search file is now "MS Shell Dlg" (the same as elsewhere in AB) that means that is CoolType friendly (TTF)
AFL: SetOption("ExtraColumnsLocation", col) - this new option allows the user to change the location of custom columns added during backtest/optimization

"extra" columns mean:
a) any custom metrics added using custom backtester
b) any optimization parameters defined using Optimize() function
If both custom metrics and optimization parameters are present then
custom metrics appear first then optimization parameters

This function is provided to allow the user to change the default "at the end" location of custom columns/optimization parameters.
For example

SetOption("ExtraColumnsLocation", 1 );

will cause that custom metrics and opt params will be subsequently added starting from column 1 (as opposed to last column default)

Note that this setting changes "visual" order of columns, not really in-memory order or export order, so
exported data files or copy/paste format do not change.
Implemented hiding columns in all list views (right click over list view HEADER to bring "Setup Columns" dialog)
Storing column state (widths/ordering/visibility) in automatic analysis implemented
The widths, ordering and visibility of all built-in columns in automatic-analysis is stored between runs.
This works for each operation mode (i.e. scan/backtest/optimization) separately, so column setup
for scan does not affect stored column order for backtest, as well as state of columns for optimization does not
affect backtest, etc.
Note also that state of exploration mode is not stored, due to its complete user-configurability from AFL level.
Data Window implemented (available from View->Data Window menu)

(if you can not see this menu, you would need to reset the menu using Tools->Customize, select "Menu Bar" and then press "Reset" button).
If you prefer to use Data Window over data tooltips, you can turn off data tooltips using Tools->Preferences, "Miscellaneous" tab, UNCHECK "Price data tooltips" box.
Home key was working incorrectly when more than one pane was used in the chart. Fixed
Implemented simple performance monitor Tools->Performance Monitor
Showing some memory and usage statistics:
- number of symbols in the database
- number of symbols cached in RAM
- quotation data memory usage
- current symbol memory usage
- total chart refresh time
- real-time data stream update frequency
The contents of the window is updated automatically every 3 seconds

This tool is intended to be used now for two purposes:
a) tweaking cache settings for best RAM usage (for example optimizations will run faster if all quotation data can be kept in RAM)
b) monitoring real-time performance

More uses will probably come in the future.
Time&Sales window now shows some "recent statistics" regarding trading

Time&Sales window now shows some "recent statistics" regarding trading namely:
- number of trades and average # of trades per second
- number of trades and shares traded at ask or above
- number of trades and shares traded at bid or below
- ask minus bid difference expressed in number of trades and shares
- ask minus bid difference expressed as percentage ratio to total trades/total volume traded
A little background:
Ask minus bid: the positive numbers represent more transactions occuring on ASK side than on BID side.
This in theory may mean more buying than selling, but in practice things are largely dependent
on security traded. Esp. dark liquidity pools do not show in order books and
may report trades to the tape several seconds later thus invalidating relationship between
bid/ask and actual trade prices.

IMPORTANT:
These are temporary, short-term stats - they cover ONLY trades displayed in the T&S window since opening of the window OR
resetting stats.

You can reset statistics using right click menu : "Reset Stats"

CHANGES FOR VERSION 5.22.0 (as compared to 5.21.0)

added ability to extend blank chart area by pressing END key multiple times (each time 10 blank bars are added) and restoring preferences value by subsequent pressing of HOME key.
added option to always require variable declarations (using local/global) on formula-by-formula basis:
SetOption("RequireDeclarations", True );
global test1;
test1 = 5; // OK variable declared
test2 = 3; // error: assignment without declaration
added typeof() operator

The typeof operator is used in the following way:
typeof (operand)
The typeof operator returns a string indicating the type of the *unevaluated* operand. operand is the string, variable, function identifier, or object for which the type is to be returned.
When supplying identifier, it should be provided alone, without arithmetic operators, without extra arguments and without braces.
If you want to check the type of value returned by the function, you must first assign the return value to a variable and then use
typeof( variable ).
Possible return values are:
" undefined" - identifier is not defined
" number" - operand represents a number (scalar)
" array" - operand represents an array
" string" - operand represents a string
" function" - operand is a built-in function identifier
" user function" - operand is a user-defined function
" object" - operand represents COM object
" member" - operand represents member function or property of COM object
" handle" - operand represents Windows handle
" unknown" - type of operand is unknown (should not happen)typeof operator allows among other things to detect undefined variables in the following way
if( typeof( somevar ) == "undefined" )
{
/// when somevar is undefined the code here will execute
}
The following sample COMMENTARY code shows the output of
typeof in some common situations
x = MACD();
y = LastValue( x );
function testfun() { return 1; };
printf( typeof( test ) + "\n" ); // the undefined variable
printf( typeof( 1 ) + "\n"); // literal number
printf( typeof( "checking" ) + "\n"); // literal string
printf( typeof( x ) + "\n"); // array variable
printf( typeof( y ) + "\n"); // scalar variable
printf( typeof( MACD ) + "\n"); // function identifier
printf( typeof( testfun ) + "\n" ); // user function identifier
GetSignalQty member function of Backtester object returned zero. Fixed now
In the Plot() function Xshift parameter was used as z-order in 5.21 beta. Fixed now.
Plot, PlotOHLC and PlotForeign() are no longer limited to -5..+5 zorder range. You can use any zorder value now.

Note that if you use zorder outside default range -5..+5, you may see performance degradation for big positive and big negative z-order values.
Approximate performance penalty is 10 milliseconds for 100 z-orders (or 1ms for 10 z-orders)
SetChartOptions now adds ability to programmatically extend blank space on chart-by-chart basis

SetChartOptions( Mode = 0, Flags = 0, gridFlags = chartGridMiddle, ymin = 0, ymax = 0, blankbars = 0 )
New, 6th parameter "blankbars" defines the minimum number of blank bars for given chart. The default value of zero means no change
(use preferences setting).
if specified value is less than value set in preferences, it is ignored, so you can not decrease the blank bars below value set in preferences.
if many panes within same chart use this function, then the largest specified blankbars will be used
Note that you can still extend blank space further using END key.
Special feature - if "blankbars" is negative then extra blank bars added are equal to absolute value of blankbars parameter plus chart gets scrolled to rightmost position.
Caveat: forcing custom blankbars via SetChartOptions effectivelly disables HOME key scroll to begin operation.
the feature to extend blank area via mouse wheel and > button is removed, due to complaints received

CHANGES FOR VERSION 5.21.0 (as compared to 5.20.0)

Added optional data padding for non-trading days (switchable from View->Pad non-trading days menu) - for daily and higher intervals only (FC#1136,FC#1174)
All drawing tools now can define Z-order (from -5 to +5).

Z-order.
Imagine that you could see the drawing objects arranged on the chart page like puzzle pieces on a table. Some objects may appear to be placed one on top of another, and others may be overlapping.
This third dimension of chart page is known as "Z order." If the X axis relates to width and the Y axis to height, then the Z order relates to depth. Although Z order cannot be seen directly, just as can you position objects along X and Y (horizontal and vertical) axes, you can also position them in the Z order.
Every object on the page has its Z order, positioned in back to front order, so that objects at the front will take precedence over objects behind.
Z order gives you the ability to superimpose objects one on top of another.
You can change Z-order parameter using Properties dialog
as well as using Format->Z-Order->Bring Forward / Send Backward menus
(and default keystrokes Shift+Page Up, Shift+Page Down)
Negative values mean BEHIND axis/grid, positive mean above grid.
Blank area past last available quote can be now enlarged on the fly by simply using > arrow in the scroll bar or using mouse wheel (just roll the wheel past the last bar) (FC #430,#1516, #1500, #1239, #982, #808, #561 )
CBT: Backtester.GetSignalQty( bar, type ) method implemented (FC#1671)

Backtester object
GetSignalQty( bar, type ) method
- retrieves the number of signals occuring on given bar
type = 0 - both entry and exit signals
type = 1 - only entry signals
type = 2 - only exit signals
Note that AmiBroker to conserve memory keeps track only of 2 * MaxNumberOfPositions entry signals on any single bar,
however it keeps track of ALL exit signals (because they consume much less space and at the time of signal collection
it is not known which positions are already open, so all exits must be tracked to prevent missing an exit)
E-mail alerts can now be sent through different port than 25 (see Tools->Preferences->Alerts) (FC#1641)
Early warning of indicator space running out. At application exit the message is displayed when less than 10% indicator space is left, plus an offer to run Indicator Maintenance (FC#1667)
new AFL functions ColorBlend

ColorBlend( colorFrom, colorTo, factor = 0.5 )
- the function blends (mixes) colorFrom with colorTo with 'factor' proportion using the following algorithm
RGB = ( 1 - factor ) * RGB(colorFrom) + factor * RGB(colorTo );
So factor = 0 means use colorFrom only, factor = 1 means use colorTo only. All in-between values
mean create mix of colors. The lower the factor value means more colorFrom.
This function makes it easy to lighten or darken colors like this:
function ColorLighten( color )
{
return ColorBlend( color, colorWhite, 0.5 );
}
function ColorDarken( color )
{
return ColorBlend( color, colorBlack, 0.5 );
}
Plot, PlotForeign and PlotOHLC now have new parameter zorder which defines the Z-axis position of given plot. (FC#257)

zorder can be set from -5 to 5.
The default is zero.
Zorder = 0 means also where the "grid" is located.
So if you want to plot BEHIND the grid you need to specify negative zorder parameter.
Smaller values mean draw first (i.e. BEHIND others), higher values mean draw later (ON TOP of others).
Plots are drawn in the following order:
- zorder parameter takes precedence over the order of calling Plot() functions, so if z-order is set, it determines plotting order.
  See http://www.amibroker.com/gifs/zorder.gif
- If multiple plots use the same z-order parameter they are plotted in reverse call order (ones that appear last in the code are plotted first). This rule can be changed by already existing switch graphzorder = 1 which, when specified, reverses this behaviour (so plots are drawn in call order).
Please note the above applies to each zorder "layer" separately (so within same zorder "layer" reverse call rule applies)
This may sound complicated but is required for backward compatibility.
Example:
Bollinger bands with "cloud" fill behind price (zorder = -1)
P = ParamField("Price field",-1); Periods = Param("Periods", 15, 2, 100, 1 ); Width = Param("Width", 2, 0, 10, 0.05 ); Color = ParamColor("Color", colorLightGrey ); Style = ParamStyle("Style") | styleNoRescale;; Plot( bbt = BBandTop( P, Periods, Width ), "BBTop" + _PARAM_VALUES(), Color, Style ); Plot( bbb = BBandBot( P, Periods, Width ), "BBBot" + _PARAM_VALUES(), Color, Style ); PlotOHLC( bbt, bbt, bbb, bbb, "", ColorBlend( Color, colorWhite, 0.9 ), styleCloud, Null, Null, Null, -1 );
Rectangle and Ellipse drawing tool now are by default SOLID, with default fill color being a blend between background and selected drawing color, they are use ZOrder = -1 (behind regular plots) by default
Support for SSL (secure connection) e-mail alerts added, so now you can use your GMail accounts. (FC#83)
Steps:
1. Download and install AmiBroker 5.21 or higher
2. Download and run SSL add-on from http://www.amibroker.com/bin/SSLAddOn.exe
3. Configure (Tools->Preferences->Alerts) with SSL enabled as shown in this picture:
http://www.amibroker.com/gifs/gmailalert.gif
X-Y co-ordinate labels on axes implemented. Can be controlled using View->X-Y labels menu. (FC#1621, FC#732)

CHANGES FOR VERSION 5.20.0 (as compared to 5.19.0)

AFL: new function StrCount( "string", "substring" )

Function returns integer which is number of times substring was found in string. It is case sensitive.
The function can be used for example to count the number of commas in comma-separated list

tickers = "AAPL,MSFT,INTC";

numtickers = 1 + StrCount( tickers, "," );
AFL: StrExtract( "string", item ) now accepts negative item values allowing to address items counting from the END of the list

tickers = "AAPL,MSFT,INTC";
"The last item is " + StrExtract( tickers, -1 );

printf("listing from the end of the list:\n");

for( item = -1; ( sym = StrExtract( tickers, item ) ) != ""; item-- )
{
printf( sym + "\n" );
}
minor fixes

CHANGES FOR VERSION 5.19.0 (as compared to 5.18.0)

Internal log window deletes all items if "!CLEAR!" text is outputted (FC 1552)
Example:
_TRACE("!CLEAR!"); // this clears the internal log window.
_TRACE("First line after clear");
SetOption("RefreshWhenCompleted", True) added. This performs View->Refresh All once AFTER AA operation is completed

Under normal circumstances it is not needed to use that because AmiBroker refreshes ticker tree if necessary,
for example if use AddToComposite. It may be useful if you however use OLE automation inside AA and you don't want to trigger too many refreshes using RefreshAll().
This only works in Automatic Analysis, when used in indicator code it has no effect.
Sometimes AddSummaryRows was not working when AB.RefreshAll() was used in the formula. Fixed now. (FC1550)
Date time calendar disappeared when streaming update arrived. Fixed now. (FC 1572)
Equity ticker symbols (~~~EQUITY, BESTEQUITY, ISEQUITY, OSEQUITY) marked with special flag so they are not used (skipped) in backtest
Fib Timezones tool now displays lines 144 and 233 too. (FC20)
math functions (sin,cos,log, ...) added to profiler reporting (array versions only)
RT quote and log window tab sheet drag-drop marker is visible again
Y-axis scale labels do not overlap even if chart is very compressed

CHANGES FOR VERSION 5.18.0 (as compared to 5.17.1)

AFL: CategorySetName() function

CategorySetName( name, category, number )
Function sets the name of category (group,market, watch list, industry)

Arguments;
name - a new name for the category (in case of watch lists it has to be unique)
category - type of category, one of the following: categoryMarket, categoryGroup, categorySector, categoryIndustry, categoryWatchlist
number - the number (index) of the category 0.255 for market, group industry, 0..32 for sectors, 0...unlimited for watch lists
Please note that the function will also create watch list of given index if one does not exist.
Added protection against trying to use 3d graph on non-exhaust optimization
ParamToggle default value not shown after "Reset all" in AA [#52129]. Fixed
added <= 0 check for log10 calls to protect from FPU exceptions when using log chart scale
Added error message that prevents from running "Current symbol" backtest on IS/OOS/Best equity special tickers
Added symbol validity check in backtest "Apply To: Current symbol"
In detailed log mode the backtester now reports reason why trade is not entered
Line studies were not visible on Yearly and Qtrly charts. Fixed
Progress window does not steal focus from active window (prevents some random crashes when "run every" is used)
When "run every" is used progress window is displayed minimized when AA is minimized

CHANGES FOR VERSION 5.17.1 (as compared to 5.17.0)

In 5.17.0 "Current symbol" selection in AA always used first symbol in the database. Fixed.

CHANGES FOR VERSION 5.17.0 (as compared to 5.16.0)

Log Window implemented

Log window (View->Log) allows to view:
edit-time errors displayed during formula check
run-time errors that occur when formula is running (not edited)
_trace command output within AmiBroker (without using 3rd party debug view)
To perform tasks such clearing the output, copying, changing settings use right - mouse click over the log window list.
Double click on the error line brings up the editor, so you can fix the error easily.

While "edit-time" error list is cleared automatically each time you check the syntax in the editor, the run-time error list is NOT cleared, so all errors remain listed, even if they are fixed already, unless you manually clear the list.

Note that _TRACE output is by default directed to outside debugger (like DebugView), in order to enable internal display you need to switch appropriate option in the Tools->Preferences->AFL You can choose to display internally / externally or in both places.
Internal _trace has much lower performance penalty (order of magnitude) than external, but that is achieved by the fact that
internal log window is refreshed only when application is not busy. It is appropriate for some uses, but you may prefer more immediate
refresh offered by DebugView.
Zooming via Scroll bar improved. Now it works with wider range of zoom factors and also does not disable scoll bar when all quotes are visible. As accessibility feature, you can temporarily DISABLE zoom via scroll bar by pressing and holding down CTRL key.
Added extra protection against going out of drawing array bounds in GetNextDrawing
when broker.master file was loaded, some symbol temporary data were read from non-zeroed memory, fixed now
fixed display glitch that occurred on some bars when logarithmic scale was used and chart was drawn using compression (2x more bars than pixels)
When application is closed in Minimized state, the x,y co-ords of main window are not stored
styleHistogram chart when drawn in compressed mode could fail to display some negative spikes (below base level) in 5.16. Fixed.
inQuarterly and inYearly higlighted in AFL editor now
SetBarFillColor could not make candle with same body and outline color. Fixed now.
Fixed handling Null in styleArea chart (Null was ignored in 5.16)
32bit AmiBroker is now compiled with LARGEADDRESSAWARE flag, that allows it to use 3GB on 32 bit Windows versions that have /3GB boot flag enabled and 4GB on 64 bit Win
First sorted column is drawn with darker color now (as in Windows explorer)
Layouts are displayed in alphabetical order now (previously they were sorted only if files were stored on NTFS partition)
When from-to range of backtest was small, AB sometimes allocated too large cache for portfolio backtest than necessary. Now it is fixed and should provide speed up for short range backtests.

CHANGES FOR VERSION 5.16.0 (as compared to 5.15.0)

If in-memory cache was too small, it could happen that Walk-Forward kept old equity values in ~~~BESTEQUITY. Fixed now.
AFL: Faster LR. Added constant-period version of linear regression calc - reduces complexitiy from O(N^2) to O(N)

Constant-period LinearReg, LinRegSlope, LinRegIntercept, TSF and StdErr functions execute now order(s) of magnitude faster.
AFL: new GetChartBkColor function

Returns RGB color value of chart background. Sample code:
SetChartBkColor( ParamColor("Color", ColorRGB( 255, 255, 255 ) ) );

rgb = GetChartBkColor();

red = ( rgb & 255 );
green = floor( (rgb/256) & 255 );
blue = floor( rgb/(256*256) );

Title="R="+ red + " G=" + green + " B=" + blue;
Candlestick style switches back to bar chart when number of bars displayed is twice the number of screen pixels
eSignal plugin 1.9.0 (fixes to problem with RT update of certain foreign future markets such as NSF)
IBController 1.2.0
- following TWS API changes ignoreRth and rthOnly flags are removed and replaced with single flag: outsideRTH
- IBc now allows to define which error codes should be ignored using File->Error code ignore list
- upgraded to use latest TWS API 9.41 (tested with latest TWS 885.7, requires at least 879)
Improved speed of Day(), Month(), Year(), DaysSince1900(), DayOfWeek(), DayOfYear() functions on intraday data (upto 20x faster)
Improved speed of DayOfWeek(), DayOfYear(), DaysSince1900() on EOD data (upto 2x faster)
Optimized chart drawing for large number of bars, upto 10x faster when more than 70000 bars are visible on screen

The drawing algorithm switches to optimized drawing mode when just one line draw per horizontal pixel is performed if there are 2x or more bars than screen pixels.
Say() function has now ability to queue speak requests

Say( "Text", purge = True );
when purge is set to True (the default) - any call to Say() purges all previous speak requests (queued or in-progress) and speaks
specified text immediatelly.

when purge is set to False - speak request is queued and will be spoken right after previous requests are done.

Also now Say() function returns the NUMERIC value that indicates how many speak requests are pending
0 - ERROR - speech engine not installed or not working properly
1 - currently requested text is spoken now (queue was empty)
2 or more - queue was not empty and previous request(s) will be completed prior to speaking currently specified text

CHANGES FOR VERSION 5.15.0 (as compared to 5.14.0)

SetForeign called multiple times with "tradeprices" parameter set to True freed memory only partially. Now fixed.
Equity() function does not cause exception when running backtest with QuickAFL enabled
Equity() function does not require all past bars anymore when used in AA
OptimizerSetEngine("") in some circumstances selected random plugin. Fixed now.
When user has aborted optimization during in-sample step, the previously used opt params were not freed. Fixed.
Implemented command line parameter that allows to specify the database to load at startup. /database "the path to the database here"
In some places C-runtime mktime() was used leading to problems with dates prior to 1970. Fixed now.
During custom backtester phase the ~~~EQUITY ticker is protected from flushing out of cache (it could only happen if using OLE to access quotes inside CB proc)
Now ~~~BESTEQUITY, ~~~ISEQUITY, ~~~OSEQUITY are not flushed out from the cache during WF even if cache is small (ensures no missing parts in IS/OOS chart)
Single-symbol optimization now also uses QuickAFL (when enabled). Requirements for the first symbol are calculated in setup phase. To get "most safe" requirement estimation, the setup phase uses maximum values of opt params.

CHANGES FOR VERSION 5.14.0 (as compared to 5.13.0)

added support for Quarterly and Yearly intervals in all parts of the program
- new menu items under View interval
- new AFL constants inQuarterly, inYearly
- Yearly and Quarterly charts compression
- updated TimeFrame functions
Changes to drawing made in v5.13 caused improper drawing lines located PAST the last available quote (trendlines and pitchforks) when timestamping method was "START TIME of interval". This is fixed now.
Fixed AddSummaryRows so 'onlycols' parameter default (zero) is applied properly
Implemeted "Select all" via Ctrl-A keyboard shortcut for all list (result list in AA for example)
Mouse cursor shape (moving/sizing) reflects the selected study priority when more than one study exists under mouse position
new multiple Volume At Price charts at user-defined points via new PlotVolumeOverlayA function

PlotVAPOverlayA( segments, lines = 300, width = 80, color = colorLightGrey, vapstyle = 4);
segmens - is an array which holds 0 and 1 (False/True) values, where 1 indicates starting/ending point of each VAP segment

AmiBroker will draw as many segments as there are '1' in the array. Note that minimum segment length is 2, so if entire array is filled with 1-s only,
it won't draw anything. In other words, there must be zeros (at least one) between 1's.

Simplest example:

Plot(C, "Close", colorBlack, styleCandle ); segments = IIf( Interval() < inDaily, Day(), Month() ); // draw daily or monthly VAP segments depending on display interval segments = segments != Ref( segments , -1 ); PlotVAPOverlayA( segments );

More complex example:
_SECTION_BEGIN("Price"); SetChartOptions(0,chartShowArrows|chartShowDates); _N(Title = StrFormat("{{NAME}} - {{INTERVAL}} {{DATE}} Open %g, Hi %g, Lo %g, Close %g (%.1f%%) {{VALUES}}", O, H, L, C, SelectedValue( ROC( C, 1 ) ) )); Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() ); _SECTION_END(); _SECTION_BEGIN("VAP"); segments = IIf( Interval() < inDaily, Day(), Month() ); segments = segments != Ref( segments , -1 ); PlotVAPOverlayA( segments , Param("Lines", 300, 100, 1000, 1 ), Param("Width", 80, 1, 100, 1 ), ParamColor("Color", colorGold ), ParamToggle("Side", "Left|Right" ) | 2 * ParamToggle("Style", "Fill|Lines", 0) | 4*ParamToggle("Z-order", "On top|Behind", 1 ) ); Plot(segments, "", colorLightGrey, styleHistogram | styleOwnScale ); _SECTION_END();
QuickAFL can now be used in Automatic Analysis (Settings: General: "Use QuickAFL" - check this box) - this can speed up explorations, scans and backtests by factor of 2+ if range is less than "all quotations"

More on QuickAFL feature here: http://www.amibroker.com/kb/2008/07/03/quickafl/
Range Bars compression now uses TickSize as "1R step". TickSize defined in the Symbol Information, if its value is zero, then 1R would be equivalent to 0.01 movement (for backward compat)
selecting date in multiple linked charts is now faster because redraw is not made when selected line in higher compressed interval remains in place
selector line in linked charts works OK now, regardless of selected time compression timestamping method
SetBarsRequired accepts now values -2 in special meaning: reference ALL bars

So
SetBarsRequired( -2, -2 ); // require ALL past and future bars - this turns OFF quickAFL
(Note that in pre 5.14 versions, such combination does NOTHING, and with those versions one needed
to write SetBarsRequired( 1000000, 1000000 ) to achieve the same effect)

For readability sbrNoChange (-1) and sbrAll (-2) constants were added so you can write:

SetBarsRequired( sbrAll, sbrAll );
Sometimes progress bar did not show the name of optimization engine used. Now it is fixed
Status("ActionEx") provides more codes than Status("action") to detect special executions states

Status("ActionEx") provides more detailed information about action that triggered AFL execution. Note that 5 first codes are the same as Status("action") but scope is limited to 'core'
meaning (see notes below).
Possible values
1 - actionIndicator - when indicator is being repainted
2 - actionCommentary (NOTE: commentary only, not interpretaion nor tooltip)
3 - actionScan - when AA Scan is performed
4 - actionExplore - when AA exploration is performed
5 - actionBacktest (NOTE backtest only, no optimization)
8-9 - reserved for future use
10 - actionExAAShowArrows - when AA "Show arrows" command is used
11 - actionExAAParameters - when AA "Parameters" dialog is displayed/updated
12 - actionExEditVerifyFormula - when AFL editor verifies syntax
13 - actionExOptimizeSetup - when Optimize() parameters are read (to setup optimization engine)
14 - actionExOptimizeBacktest - when Backtest is performed as a part of optimization process
15- actionExOptimizePortfolio - when portfolio-backtest phase (CUSTOM backtester) is performed as a part of optimization process
16 - actionExTooltip - when tooltip for given chart is being displayed/updated
17 - actionExInterpret - when the Interpretation window is being updated
18 - actionExInit - when AA needs to initialize QuickAFL bars required information and/or formula contains functions changing general AA options
NOTE: for backward compatiblity with all formulas you have written already, the codes for Status("action") did NOT change .
Streaming chart update could stall if trend line handle was clicked in attempt to resize and released in the very same position (without moving the mouse). Now it is fixed.
TimeFrameMode() now supports mode == 4 - which expresses RANGE bars in TickSize units (as opposed to mode 3 that uses dollars for backward compatiblity)
when display chart timing option is turned on and RT stream is active the application STATUS BAR now displays TOTAL time for all charts, it should be BELOW 1 second for RT trading

CHANGES FOR VERSION 5.13.0 (as compared to 5.12.2)

Main app window maximize state on 2nd monitor is saved OK now.
Trendlines drawn in smaller interval (such as 1-minute), was moved one bar in higher interval (such as 5 minute) if compressed intraday timestamps ware set to START time of interval or FIRST tick
The left-hand handle moved to the next bar when it was off-screen and right-hand handle was adjusted by the user. Now it is fixed. (FC#890)
When drawing is clicked without moving the mouse, the co-ordinates stay untouched ( snap is not activated until you move the mouse)
AFL: AddSummaryRows changed

AddSummaryRows( flags, format = 0, onlycols = 0, ...)
AddSummaryRows automatically adds "summary" row(s) to the exploration output.
the flags parameter can be combination of the following
1 - add TOTAL row
2 - add AVERAGE row
4 - add MIN row
8 - add MAX row
16 - add COUNT row

format - defines the numeric formating in WriteVal style so 1.2 for example means 2 decimal digits.
If default value of zero is used (or parameter not specified) the default formatting of "maximum precision"
is used - upto 15 digits are printed

onlycols - defines for which columns you want to display summary row values.
Note that if you do not specify any columns - ALL will be printed.

If you are using onlycols, you can define upto 10 columns, columns, like
in SetSortColumns are numbered starting from 1. For example:

AddSummaryRows( 1, 1.2, 3, 5, 7, 9 );

Display sum for columns: 3, 5, 7, and 9.

Generally you should call this funciton only once, using combination of flags desired.
But it is possible to call AddSummaryRows multiple times and the result will be "accumulation" (i.e. bitwise OR)
in case of "flag" parameter. format and onlycols are always overwritten by last call.

Example:

Filter=1;
AddColumn(V, "Volume" );
AddSummaryRows( 31, 1.2 ); // add Total, Average, Min, Max, and Count rows (1+2+4+8+16)=31 - with two decimal places
summary rows are added at the top of the list
Handles from selected study line are respected (i.e when study is already selected, and multiple studies exists under "click" point, the selection does not change) (FC#726)
Magnet mode can be asynchronously (temporarily) toggled by holding SHIFT key while drawing. Toggle means that if you are in magnet mode and hold down shift it will turn it off and vice versa
Magnet mode implemented for horizontal price levels and working correctly now (stay horizontal) (FC#728)
During optimization Progress bar shows engine ID, opt. target, best value, step and best combination of parameters found upto "now". These figures are refreshed every second.
Optimization (in non-WF mode) results are sorted by optimization target column (too)
New optimization engine added: CMAE (Covariance Matrix Adaptation Evolutionary Strategy) optimizer plug-in

CMA-ES (Covariance Matrix Adaptation Evolutionary Strategy) is state-of-the-art non-exhaustive optimizer.
For scientific background see:
http://www.bionik.tu-berlin.de/user/niko/cmaesintro.html
According to scientific benchmarks outperforms nine other, most popular evolutionary strategies (like PSO, Genetic and Differential evolution).
http://www.bionik.tu-berlin.de/user/niko/cec2005.html
The CMAE.DLL plugin implements "Global" variant of search with several restarts with increasing population size
CMAE.DLL comes with FULL SOURCE CODE (inside "ADK" folder)

By default number of runs (or restarts) is set to 5.
It is advised to leave the default number of restarts.
You may vary it using OptimizerSetOption("Runs", N ) call, where N should be in range 1..10.
Specifying more than 10 runs is not recommended, although possible.
Note that each run uses TWICE the size of population of previous run so it grows exponentially.
Therefore with 10 runs you end up with population 2^10 greater (1024 times) than the first run.

There is another parameter "MaxEval". The default value is ZERO which means that plugin will automatically calculate MaxEval required. It is advised to NOT to define MaxEval by yourself as default works fine.

The algorithm is smart enough to minimize the number of evaluations required and it converges VERY fast to solution point, so usually it finds solutions way faster than other strategies.

It is normal that the plugin will skip some evaluations steps, if it detects that solution was found, therefore you should not be surprised that optimization progress bar may move very fast at some points. The plugin also has ability to increase number of steps over initially estimated value if it is needed to find the solution. Due to its adaptive nature, the "estimated time left" and/or "number of steps" displayed by the progress dialog is only "best guess at the time" and may vary during optimization course.

To use CMA-ES optimizer, you just need to add one line to your code:

OptimizerSetEngine("cmae");

This will run the optimization with default settings which are fine for most cases.

It should be noted, as it is the case with many continouos-space search algorithms, that decreasing "step" parameter in Optimize() funciton calls does not significantly affect optimization times. The only thing that matters is the problem "dimension", i.e. the number of different parameters (number of optimize function calls). The number of "steps" per parameter can be set without affecting the optimization time, so use the finest resolution you want. In theory the algorithm should be able to find solution in at most 900*(N+3)*(N+3) backtests where "N" is the dimension. In practice it converges a LOT faster. For example the solution in 3 (N=3) dimensional parameter space (say 100*100*100 = 1 million exhaustive steps) can be found in as few as 500-900 CMA-ES steps.
New optimization engine added: "Tribes" adaptive PSO optimizer implemented

Tribes is adaptive, parameter-less version of PSO (particle swarm optimization) non-exhaustive optimizer.
For scientific background see:
http://www.particleswarm.info/Tribes_2006_Cooren.pdf
In theory it should perform better than regular PSO, because it can automatically adjust the swarm sizes and algorithm strategy to the problem being solved.

Practice shows that its performance is quite similar to PSO.

To find solutions significantly faster I can recommend CMA-ES (Covariance Matrix Adaptation Evolutionary Strategy) algorithm instead.

The Tribes.DLL plugin implements "Tribes-D" (i.e. dimensionless) variant. Based on http://clerc.maurice.free.fr/pso/Tribes/TRIBES-D.zip by Maurice Clerc. Original source codes used with permission from the author

Tribes.DLL comes with FULL SOURCE CODE (inside "ADK" folder)

Supported parameters:
" MaxEval" - maximum number of evaluations (backtests) per run (default = 1000).
OptimizerSetOption("MaxEval", 1000 );
You should increase the number of evaluations with increasing number of dimensions (number of optimization params).
The default 1000 is good for 2 or maximum 3 dimensions.

"Runs" - number of runs (restarts). (default = 5 )
You can leave the number of runs at default value of 5.

By default number of runs (or restarts) is set to 5.

To use Tribes optimizer, you just need to add one line to your code:

OptimizerSetEngine("trib");

OptimizerSetOption("MaxEval", 5000 ); // 5000 evaluations max

CHANGES FOR VERSION 5.12.2 (as compared to 5.12.0)

In 5.12.0 BETA the walk-forward test was stopping after first in-sample cycle. Now it is fixed.
AddSummaryRows total did not include the very first item. Fixed.

CHANGES FOR VERSION 5.12.0 (as compared to 5.11.1)

ADK: A new interface for external optimization engines, see optimizer.html
Added two example non-exhaustive optimizers: Standard Particle Swarm Optimizer (spso), and Monte Carlo (random pick) optimizer( moca)

Note that BOTH optimizers are provided for demonstration purposes.
Particularly Monte Carlo optimizer is meant as a "the most trivial and simple" or even "dumb" example of optimizer DLL coding.
It works by randomly picking parameter combinations without ANY additional logic. The results are thus random
and most probably sub-optimum.
On the other hand Standard Particle Swarm Optimizer is based on SPSO2007 code that is supposed to produce
good results provided that correct parameters (i.e. Runs, MaxEval) are provided for particular problem.
Picking correct options for the PSO optimizer can be tricky therefore results may significantly vary from case to case.

The source codes for both optimizers are OPEN and provided as illustration how to implement optimizer engines using
" simple" and "advanced" methods as described in optimizers.html file. You can find full source codes inside "ADK" subfolder.

In the future, I will provide more robust non-exhaustive optimizers using various methods.

Example code for Standard Particle Swarm Optimizer:
(finding optimum value in 1000 tests within search space of 10000 combinations)

OptimizerSetEngine("spso");
OptimizerSetOption("Runs", 1 );
OptimizerSetOption("MaxEval", 1000 );

sl = Optimize("s", 26, 1, 100, 1 );
fa = Optimize("f", 12, 1, 100, 1 );

Buy = Cross( MACD( fa, sl ), 0 );
Sell = Cross( 0, MACD( fa, sl ) );

Example Code for Monte Carlo optimizer:
(finding sub-optimum value in 1000 test within search space of 10000 combinations)

OptimizerSetEngine("moca");
OptimizerSetOption("NumSteps", 1000 );

sl = Optimize("s", 26, 1, 100, 1 );
fa = Optimize("f", 12, 1, 100, 1 );

Buy = Cross( MACD( fa, sl ), 0 );
Sell = Cross( 0, MACD( fa, sl ) );
Increased limit of optimization parameters to 100
AFL: new OptimizerSetOption("name", value ) function

The function set additional parameters for external optimization engine. The parameters are engine-dependent.
For example SPSO optimizer supports "Runs" (number of runs) and "MaxEval" (maximum evaluations (tests)per single run) parameters. Monte Carlo optimizer supports "NumSteps" (number of steps) parameter.
AFL: new OptimizerSetEngine("name") function

The function selects external optimization engine defined by name. For demonstration two engines are provided: Standard Particle Swarm Optimizer ("spso") and Monte Carlo (random pick) optimizer ("moca")

Example:
OptimizerSetEngine("moca");
ADK: new example C++ source codes: PSOSample, MOCASample
AFL: AddSummaryRows( flags )

AddSummaryRows automatically adds "summary" row(s) to the exploration output.
the flag parameter can be combination of the following
1 - add TOTAL row
2 - add AVERAGE row
4 - add MIN row
8 - add MAX row
16 - add COUNT row
You can call AddSummaryRows multiple times and the result will be "accumulation" (i.e. bitwise OR)

Example:

Filter=1;
AddColumn(V, "Volume" );
AddSummaryRows( 31 ); // add Total, Average, Min, Max, and Count rows (1+2+4+8+16)=31

summary rows are added at the top of the list

CHANGES FOR VERSION 5.11.1 (as compared to 5.11.0)

Fixed problem with Walk Forward picking sometimes not the best parameter when thousand separator was used and metric values were greater than 1000

CHANGES FOR VERSION 5.11.0 (as compared to 5.10.1)

Backtester: Implemented SeparateLongShortRank

To enable separate long/short ranking use:
SetOption("SeparateLongShortRank", True );
When separate long/short ranking is enabled, the backtester maintains TWO separate "top-ranked" signal lists, one
for long signals and one for short signals. This ensures that long and short candidates are independently even if position score
is not symetrical (for example when long candidates have very high positive scores while short candidates have only fractional negative scores).
That contrasts with the default mode where only absolute value of position score matters, therefore one side (long/short) may completely dominate ranking if score values are asymetrical.

When SeparateLongShortRank is enabled, in the second phase of backtest, two separate ranking lists are interleaved to form final signal list by
first taking top ranked long, then top ranked short, then 2nd top ranked long, then 2nd top ranked short, then 3rd top ranked long
and 3rd top ranked short, and so on... (as long as signals exist in BOTH long/short lists, if there is no more signals of given kind, then
remaining signals from either long or short lists are appended)

For example:
Entry signals(score):ESRX=Buy(60.93), GILD=Short(-47.56), CELG=Buy(57.68), MRVL=Short(-10.75), ADBE=Buy(34.75), VRTX=Buy(15.55), SIRI=Buy(2.79),

As you can see Short signals get interleaved between Long signals even though their absolute values of scores are smaller than corresponding scores of long signals. Also there were only 2 short signals for that particular bar so, the rest of the list shows long signals in order of position score

Although this feature can be used independently, it is intended to be used in combination with MaxOpenLong and MaxOpenShort options.
Backtester: MaxOpenLong/MaxOpenShort implemented

MaxOpenLong - limits the number of LONG positions that can be open simultaneously
MaxOpenShort - limits the number of SHORT positions that can be open simultaneously
Example:
SetOption("MaxOpenPositions", 15 );
SetOption("MaxOpenLong", 11 );
SetOption("MaxOpenShort", 7 );

The value of ZERO (default) means NO LIMIT. If both MaxOpenLong and MaxOpenShort are set to zero (
or not defined at all) the backtester works old way - there is only global limit active (MaxOpenPositions) regardless of type of trade.

Note that these limits are independent from global limit (MaxOpenPositions).
This means that MaxOpenLong + MaxOpenShort may or may not be equal to MaxOpenPositions.

If MaxOpenLong + MaxOpenShort is greater than MaxOpenPositions
then total number of positions allowed will not exceed MaxOpenPositions, and individual long/short limits will apply too.
For example if your system MaxOpenLong is set to 7 and maxOpenShort is set to 7 and MaxOpenPositions is set to 10
and your system generated 20 signals: 9 long (highest ranked) and 11 short, it will open 7 long and 3 shorts.

If MaxOpenLong + MaxOpenShort is smaller than MaxOpenPositions (but greater than zero), the system won't be able to
open more than (MaxOpenLong+MaxOpenShort).

Please also note that MaxOpenLong and MaxOpenShort only cap the number of open positions of given type (long/short).
They do NOT affect the way ranking is made. I.e. by default ranking is performed using ABSOLUTE value of positionscore.

If your position score is NOT symetrical, this may mean that you are not getting desired top-ranked signals from one side.
Therefore, to fully utilise MaxOpenLong and MaxOpenShort in rotational balanced ("market neutral") long/short systems
it is desired to perform SEPARATE ranking for long signals and short signals.
To enable separate long/short ranking use:
SetOption("SeparateLongShortRank", True );
Added ability to running Walk forward test from OLE, using Optimize(3)

Analysis.Optimize( mode )
when mode == 3 it runs walk forward test
AB = new ActiveXObject("Broker.Application");
AA = AB.Analysis;
AA.Optimize(3);
AFL: DaysSince1900() function

It returns the number of days that passed since January 1st, 1900, counting from 1. January 1, 1900 is serial number 1, and January 1, 2008 is serial number 39448 because it is 39,448 days after January 1, 1900. Technically is equal to Windows OLEDATE and Excel's DATEVALUE function.

The function can be used for calculations that involve calendar days as opposed to trading days and replaces previously proposed AFL solution
http://www.amibroker.com/kb/2007/03/15/calendar-day-index/

Now RefDays can be implemeted as follows:

SetBarsRequired( 365, 0 ); function RefDays( Array, Days ) { td = DaysSince1900(); result = Null; if( Days < 0 ) { for( i = BarCount -1; i >= -Days; i = i - 1 ) { backday = td[ i ] + Days; // Days is negative for( j = -Days/2; j < i; j++ ) { if( td[ i - j ] <= backday ) { result[ i ] = Array[ i - j ]; break; } } } } return result; } Plot( C, "C", colorRed ); Plot( Ref( C, -252 ), "Close 252 bars back", colorBlue ); Plot( RefDays( C, -365 ), "Close 365 days back", colorGreen );

CHANGES FOR VERSION 5.10.2 (as compared to 5.10.1)

Fixed problem with Walk Forward picking sometimes not the best parameter when thousand separator was used and metric values were greater than 1000

CHANGES FOR VERSION 5.10.1 (as compared to 5.10.0)

Fixed crash @004AB5A1 (when sector ID was invalid > 64)
Fixed bug AFL editor Undo @004B2324
Fixed bug @004662AD (crash when doing Code Check and Profile while AA running in background)

CHANGES FOR VERSION 5.10.0 (as compared to 5.09.0)

Small improvement in axis font positioning - based on TEXTMETRIC
Removed 1-pixel rendering overlap in multi-colored chart titles when ClearType was enabled
Hi-Res (256x256) alpha Vista icon
Quote array now uses HeapRealloc instead of HeapAlloc/HeapFree combination
Fixed rare crash @433F58
Fixed account manager updating cash after exiting short trade
Web Browser window does not flicker anymore when resizing

CHANGES FOR VERSION 5.09.0 (as compared to 5.08.0)

MDI Tab order is now saved in the layout
Added interface to BugslayerUtil.dll for optional call stack / symbol dump report in crash recovery window
Now in the bottom of the crash report there is a detailed call stack and CPU register state. This should allow quicker/easier fixes of any crashes
New fields in Status() function: pxchart*

Status("pxchartleft") - returns x-coordinate of top-left corner of chart area
Status("pxcharttop") - returns y-coordinate of top-left corner of chart area
Status("pxchartright") - returns x-coordinate of bottom-right corner of chart area
Status("pxchartbottom") - returns y-coordinate of bottom-right corner of chart area
Status("pxchartwidth") - returns width chart area (right-left)
Status("pxchartheight") - returns width chart area (bottom-top)
Chart co-ordinates are useful because they automatically take into account selected axis font size, whenever date axis is on or off
and other settings (New Look chart style)
All co-ordinates are in screen pixels. Note that top, left coordinates may not be zero as chart rectangle is smaller than underlying window because there is an extra space (padding) around chart.

// Test code:
Title = StrFormat("left=%g, top=%g, right=%g, bottom=%g, width=%g, height=%g", left=Status("pxchartleft"), top=Status("pxcharttop"), right=Status("pxchartright"), bottom=Status("pxchartbottom"), Status("pxchartwidth"), Status("pxchartheight") ); GfxSetOverlayMode(1); GfxRectangle(Left,top, right, bottom);

============ Overlay sample ================
_SECTION_BEGIN("GfxOverlaySampleNew"); function GetVisibleBarCount() { lvb = Status("lastvisiblebar"); fvb = Status("firstvisiblebar"); return Min( Lvb - fvb, BarCount - fvb ); } function GfxConvertBarToPixelX( bar ) { lvb = Status("lastvisiblebar"); fvb = Status("firstvisiblebar"); pxchartleft = Status("pxchartleft"); pxchartwidth = Status("pxchartwidth"); return pxchartleft + bar * pxchartwidth / ( Lvb - fvb + 1 ); } function GfxConvertValueToPixelY( Value ) { local Miny, Maxy, pxchartbottom, pxchartheight; Miny = Status("axisminy"); Maxy = Status("axismaxy"); pxchartbottom = Status("pxchartbottom"); pxchartheight = Status("pxchartheight"); return pxchartbottom - floor( 0.5 + ( Value - Miny ) * pxchartheight/ ( Maxy - Miny ) ); } Plot(C, "Price", colorBlack, styleHistogram ); GfxSetOverlayMode(0); GfxSelectSolidBrush( colorRed ); GfxSelectPen( colorRed ); AllVisibleBars = GetVisibleBarCount(); fvb = Status("firstvisiblebar"); for( i = 0; i < AllVisibleBars ; i++ ) { x = GfxConvertBarToPixelX( i ); y = GfxConvertValueToPixelY( C[ i + fvb ] ); GfxRectangle( x-1, y-1, x + 2, y+1 ); } //SetChartBkGradientFill( ColorRGB(200,200,200), ColorRGB( 255,255,255) ); _SECTION_END();
OLE: Name property is now writable, allowing switchin currently selected symbol for the document

Example (JScript):
AB = new ActiveXObject("Broker.Application");
AB.ActiveDocument.Name = "MSFT"; // change the symbol for current document to "MSFT"

CHANGES FOR VERSION 5.08.0 (as compared to 5.07.0)

Walk-Forward: "Easy" mode divided into two submodes: EOD and Intraday
Easy EOD mode assumes that you are using EOD data for walk-forward.
Easy Intraday mode assumes that you are using Intraday data for walk-forward
The difference is that in EOD mode the END date of previous period and START date of next period are the same - thus avoiding gap
between periods. Intraday mode set START date of the next period as NEXT DAY after END of previous period. That guarantees
that boundary day is not counted twice when testing on intraday data.
SetOption("GenerateReport", value )
New option added to SetOption call
" GenerateReport" - 0/1/2
By default backtest reports are generated ONLY for portfolio backtests and for individual backtests if individual reporting is turned on in the settings. Reports are disabled for optimization.
Now with the SetOption() function you can either supress report generation for backtests or enable report generation during certain optimization steps, all from code level.
SetOption("GenerateReport", 0 ); // suppress generation of report
SetOption("GenerateReport", 1 ); // force generation of full report
SetOption("GenerateReport", 2 ); // only one-line report is generated (in results.rlst file) viewable as single line in Report Explorer
Total chart redraw time is calculated properly if multiple documents and charts are open that results in smoother performance and no update lockup
When custom color palette is changed, any old RGB color that is not present in changed palette is matched to closest "standard" color
Bugfix: when crosshair was enabled and moved OUTSIDE chart windows, then CPU usage was high. Now it is fixed
Walk-Forward: when starting date is the last day of the month and step is n-month then it is treated as special case
AmiBroker now detects that start day is the last day of the month and moves the window to the last day of NEXT month, even if it is shorter.
That addresses the problem when one starts with January 31 and wants to step by one month - > since there is NO February 31, previous version
moved to March 3rd. Now it detects that it is last day of the month and moves to Feb 28 (or 29). Then in next step it will move to March 31.

CHANGES FOR VERSION 5.07.0 (as compared to 5.06.0)

a bugfix in 5.06 affected Foreign() function so it did not load the data on very first access - now fixed. This fixes also huge drawdown numbers that occurred on open positions at the end of trade list if cache size was small
AFL: SetChartOptions has now 2 more parameters that allow to set custom scaling
SetChartOptions( Mode = 0, Flags = 0, gridFlags = chartGridMiddle, ymin = 0, ymax = 0 )
new ymin, ymax parameters specify Y-axis minimum and maximum values for custom scaling.
If you specify any values that meet the condition ymin < ymax, AmiBroker will turn OFF automatic scaling and use specified min/max values
for Y scale. Note that Mode argument controls when these settings are applied (0 - only when new chart is created, 1 - always), when modes 2 and 3 are used - scaling is not changed.
bugfix: in 5.06.0 deleting the very first symbol raised exception, now it is fixed
bugfix: rarely when trade profits gone to absurd levels (for example if user switched off price checking and used zero as entry price), AmiBroker would crash when generating profit distribution chart, now it is fixed
Crosshair moves way faster and flicker is practically eliminated
Crosshair state is global now and saved between sessions
Crosshair works now in floating windows and in inactive windows too
IS, OOS, BEST equity tickers are now put into group 253 and market 253 (composites)

CHANGES FOR VERSION 5.06.0 (as compared to 5.05.1)

Walk Forward: now you can select "trading days" instead of calendar days as step unit. Currently it is using simplified method: Mon-Fri as a trading days
Walk Forward settings: fixed lockup (due to infinite loop) when step was set to zero, also added other checks for invalid entries
RT Quote window: now symbols can be re-arranged by drag-and-drop (simply click on the symbol, hold and drag to re-arrange order)
RT Quote window: faster refreshes and multi-step color fading
RT Quote window: added ability to type-in multiple symbols directly (instead of selecting one by one or via existing watch list)
RT Quote window: added ability to insert EMPTY line (to separate symbol groups)
Preferences / Currencies: now you can define upto 20 currencies for multiple-currency backtesting
New FindSignal function in Backtester object (custom backtester procedure) allowing fast lookups for signals matching given symbol
bo = GetBacktesterObject();
bo.FindSignal( bar, symbol, type )
where
bar is a bar number
symbol is ticker symbol
type represents type of signal to find: 0 - both entries and exits, 1 - only entries, 2 - only exits

The function finds for first matching signal that has fPrice != -1 (different than -1). If 0 is used as type, and entry and exit is on the same bar then entry signal will be returned. Note: fPrice = -1 is a special marker meaning that given signal should be ignored.
Internal symbol pointers stay the same when new symbols are added or deleted. This addresses exceptions when using AddToComposite during backtests among other things
This fixes: FC#1101, exceptions when using AddToComposite inside CBT and exceptions occuring sometimes with COM when adding / removing symbols
Floating panes are now "sticky" that makes it easier to arrange the workspace
Charts: ability to hide vertical quote marker
The control over vertical quote marker is given now via
Parameter dialog -> Axes & Grid -> Vert. quote marker: Show/Hide
And programmatically via SetChartOptions function:
SetChartOptions( 2, chartHideQuoteMarker );
Bugfix: when "pad and align" was used in AA and reference symbol did not have all trading days, the data used for very first symbol in the watch list under test could have been unaligned for the very first AA run, subsequent runs were OK)
Alert Output column sizes / layout are now preserved between sessions
Added two new backtest modes: backtestRegularRaw2 and backtestRegularRaw2Multi that do not remove excess EXIT signals
The common thing between Raw and Raw2 modes is that they both do NOT remove excess ENTRY signals.
The difference is that Raw modes remove excess EXIT signals, while Raw2 do NOT.
In Raw2 modes all exit signals (even redundant ones) are passed
to second phase of backtest just in case that you want implement strategy that skips first exit. Lets suppose that you want to exit on some condition from first phase but only in certain hours or after certain numbers of bars in trade or only when portfolio equity condition is met. Now you can do that in raw2 modes.
Note that Raw2 modes can get significantly slower when you are using custom backtester code that iterates thru signals as there can be zillions of exit signals in the lists even for symbols that never generated any entry signals, therefore it is advised to use it only when absolutely necessary. Raw2 modes are also the most memory consuming.
Note also that if you run the system WITHOUT custom backtest procedure there should be no difference between Raw and Raw2 modes (other than speed & memory usage) as first matching exit signal is what is used by default.
3D chart viewer: process priority is now set to IDLE
3D chart viewer: animation is now smoother (upto 100fps vs 25fps)

CHANGES FOR VERSION 5.05.1 (as compared to 5.05.0)

Walk Forward AA Settings: added error message when start date > end date
Walk Forward AA Settings: added "preview" list - showing all IS and OOS segments with dates

CHANGES FOR VERSION 5.05.0 (as compared to 5.04.2)

Walk Forward: "Easy" mode in the settings implemented - it sets "out-of-sample" parameters automatically based on in-sample settings
GetCursorMouseButtons new flag = 8 - means that current chart just received mouse click

///////////////////////////////////////////////// // Low-level graphic + Interactive GUI control sample // This example shows: // 1. how to draw "buttons" // 2. how to handle mouse clicks // 3. how to implement event call-backs /////////////////////////////////////////////////// Version( 5.04 ); // requires 5.04 or higher //////////////////////////////////////////////////// // Part 1: DRAWING TABLE OF BUTTONS ////////////////////////////////////////////////// GfxSetOverlayMode( 2 ); // formatted text output sample via low-level gfx functions CellHeight = 20; CellWidth = 100; GfxSelectFont( "Tahoma", CellHeight/2 ); GfxSetBkMode( 1 ); function PrintInCell( string, row, Col ) { GfxDrawText( string, Col * CellWidth, row * CellHeight, (Col + 1 ) * CellWidth, (row + 1 ) * CellHeight, 0 ); } GfxSelectPen( colorBlue ); for( i = 0; i < 10 && i < BarCount; i++ ) { for( k = 0; k < 5; k++ ) { PrintInCell( "Button " + i + "," + k, i, k ); } GfxMoveTo( 0, i * CellHeight ); GfxLineTo( 5 * CellWidth, i * CellHeight ); } GfxMoveTo( 0, i * CellHeight ); GfxLineTo( 5 * CellWidth, i * CellHeight ); for( Col = 1; Col < 6; Col++ ) { GfxMoveTo( Col * CellWidth, 0); GfxLineTo( Col * CellWidth, 10 * CellHeight ); } ///////////////////////////////////////////////////////// // Part 2: MOUSE BUTTON CALL BACKS ////////////////////////////////////////////////////////// Title=""; function DrawButton( px, py, Clr1, Clr2, text ) { Col = floor( px / CellWidth ); Row = floor( py / CellHeight ); GfxGradientRect( Col * CellWidth, row * CellHeight, (Col + 1 ) * CellWidth, (row + 1 ) * CellHeight, Clr1, Clr2 ); PrintInCell( text + " " + row + "," + Col, row, Col ); } function OnLMouseButton(x, y, px, py) { _TRACE("LButton x = " + DateTimeToStr( x ) + " y = " + y ); DrawButton( px, py, ColorHSB( 50, 255, 255 ), ColorHSB( 90, 255, 255 ), "just clicked" ); } function OnRMouseButton(x, y, px, py) { _TRACE("RButton x = " + DateTimeToStr( x ) + " y = " + y ); } function OnMMouseButton(x, y, px, py) { _TRACE("MButton x = " + DateTimeToStr( x ) + " y = " + y ); } function OnHoverMouse(x, y, px, py) { _TRACE("LButton x = " + DateTimeToStr( x ) + " y = " + y ); DrawButton( px, py, ColorRGB( 230, 230, 230 ), ColorRGB( 255, 255, 255 ), "mouse over" ); } function OnLButtonIsDown(x, y, px, py) { _TRACE("LButton x = " + DateTimeToStr( x ) + " y = " + y ); DrawButton( px, py, ColorHSB( 190, 255, 255 ), ColorHSB( 210, 255, 255 ), "down" ); } ///////////////////////////////////////////////////////// // Part 3: GENERAL PURPOSE EVENT HANDLER (reusable! - may be put into "include" file) //////////////////////////////////////////////////////// function EventHandler() { local b, x, y, px, py; b = GetCursorMouseButtons(); // retrieve co-ordinates in date/value units x = GetCursorXPosition(0); y = GetCursorYPosition(0); // retrieve co-ordinates in pixel units px = GetCursorXPosition(1); py = GetCursorYPosition(1); if( b & 8 ) // flag = 8 is set when window just received mouse click { // not-null means clicked in THIS (current) window if( b & 1 ) OnLMouseButton( x, y, px, py ); if( b & 2 ) OnRMouseButton( x, y, px, py ); if( b & 4 ) OnMMouseButton( x, y, px, py ); } else { if( b == 0 ) OnHoverMouse( x, y, px, py ); // no button pressed if( b == 1 ) OnLButtonIsDown( x, y, px, py ); // button pressed } } EventHandler(); RequestTimedRefresh( 1 );
GetCursorXPosition/GetCursorYPosition return non-null values when mouse is over the current chart regardless if it was clicked or not
BUGFIX: trend line sometimes moved to the right edge when drawing/moving them while two charts were opened in different periods
Selector line is not drawn (does not blink) when GfxOverlayMode is set to 2
Walk Forward document can now be closed and/or hidden during WF (it is not re-opened constantly)

CHANGES FOR VERSION 5.04.2 (as compared to 5.04.1)

New log scale (5.04.1) was not working nicely for small dynamic range charts - chart looked compressed. Fixed now.
Chart Periodicity on MDI tab is now updated when switching
Trendlines work fine with thick and dotted styles again (broken in 5.04)
AFL: GetCursorXPosition/GetCursorYPosition functions changed
1. The functions now by default return NULL (empty value) if mouse is OUTSIDE the current window
2. New "mode" parameter controls what values are returned

GetCursorXPosition( mode = 0 )
GetCursorYPosition( mode = 0 )

mode = -1 - (old compatibility mode) - x - value gives X-coordinate in DateTime format. y - value gives PRICE. Values are reported no matter where is the mouse (i.e. may refer to window different than current if mouse is outside current window).
mode = 0 - (default) x - value gives X-coordinate in DateTime format. y - value gives PRICE. Returns NULL if mouse is outside current window
mode = 1 - x, y - are mouse coordinates expressed in screen PIXELS. Returns NULL if mouse is outside current window

CHANGES FOR VERSION 5.04.1 (as compared to 5.04.0)

WF: Settings "Optimization target" combo box shows all built-in fields now
WF: now combined in-sample and out-sample equities are available by ~~~ISEQUITY and ~~~OSEQUITY composite tickers
(consecutive periods of IS and OOS are concatenated and scaled to maintain continuity of equity line - this approach assumes that you generally speaking are compounding profits)
To display IS and OOS equity you may use for example this:
PlotForeign("~~~ISEQUITY","In-Sample Equity", colorRed, styleLine); PlotForeign("~~~OSEQUITY","Out-Of-Sample Equity", colorGreen, styleLine); Title = "{{NAME}} - {{INTERVAL}} {{DATE}} {{VALUES}}";
WF: in-sample best uses "first best" result consistenly instead of quicksort (that did not prevent original order)
WF: the output window is re-open when user closes it during Walk Forward optimization
Log chart scaling enhanced to handle nicely extreme dynamic range

CHANGES FOR VERSION 5.04.0 (as compared to 5.03.0)

AFL Formula Editor: Copy-paste does not "eat" last character
AFL Formula Editor: Edit->Prettify Selection function added
Calling Activate() method of Window object does not maximize MDI window any more
Print Preview works fine now with floating windows
Walk-Forward Optimization implemented (v1)

CHANGES FOR VERSION 5.03.0 (as compared to 5.02.2)

Fixed: Pane/Template options do not work on floating window
Added: Interval linking
New linking settings are now saved in layouts and restored properly
(re-)added: Cursor linking - selector line moves together in symbol and/or linked charts
Removed File->New->Linked chart (new linking replaces this functionality)
Fixed: Layouts with old-style linked charts are now automatically converted into new scheme when loading layout

CHANGES FOR VERSION 5.02.2 (as compared to 5.02.1)

fixed problem with c-like multi-line comments /* */ that appeared in 5.02.1 beta

CHANGES FOR VERSION 5.02.1 (as compared to 5.01.1)

Implemented Unlimited nesting of #include and #include_once
True multi-monitor support. Chart windows can now be floated (outside main application frame) and moved to different monitors
Implemented new way of symbol-linking of charts (the button next to scrollbar allows to choose linked group (1-9))
Fixed crash when attempting to backtest on empty watch list (bug introduced in 5.01)
AFL: SetBarFillColor( colorarray ) allows to independently control candlestick, bar, cloud, and area chart fill color
OLE: when Broker.Application reference count drops to zero and AB was not running prior to CreateObject() then the AB is closed
Implemented workaround to Windows XP list view drawing bug (MS KB813791)
Floating pane title is synchronized now (5.02.0 fix)

CHANGES FOR VERSION 5.01.1 (as compared to 5.01.0)

fixed loading of customized toolbars
toolbar customizations are now stored in Broker.exe-CommandBars51 (number increased) to isolate new betas and old versions

CHANGES FOR VERSION 5.01.0 (as compared to 5.00.0)

Tweaks in backtester for improved performance
Portfolio backtester on average 2x faster for both multiple and single-security tests (some trivial, frequently trading systems may observe upto 5x speedup on multiple securities during long analysis periods). Note that AFL engine speed has NOT changed as compared to 5.00. Speed increase comes from backtester tweaks alone, so the longer AFL code is the less speed-up you will see, because backtester processing would account for smaller part of overall execution time.
Tweaks in quote handling for improved performance
Code profiler - shows code analysis with detailed per-function timing report. Available from AFL Editor: Tools->Code Check & Profile menu

CHANGES FOR VERSION 5.00.1 (as compared to 5.00.0)

Minor corrections to documentation
Small changes for compatiblity with 64 bit version
Version number bumped and release marked as official

CHANGES FOR VERSION 5.00.0 (as compared to 4.99.0)

Database Purify: Date column type in set correctly now so clicking on column sorts by date instead of by alpha (FC#1130)
Elapsed/estimated time is updated constantly when running long optimizations (FC#1107)
Extra characters in the title occuring when using dynamic color with Null values in Plot() statements. Fixed. (FC#1129)
Fixed saving of new commission table (FC#1122)
In some cases slider did not allow to reach the upper margin of Param() when step was decimal fraction like 0.1 due to floating point rounding. Now it addressed. (FC#1155)
Price Chart Style is now saved in a layout/template (FC#1039)
When Find/Replace dialog is still open while Formula Editor is closed it does not cause exception anymore

CHANGES FOR VERSION 4.99.0 (as compared to 4.98.0)

A warning added when closing the last chart window
Fixed possible stack overflow when using ASCII importer for files without extension but with . (dot) in a path (directory) name
TimeFrameMode(3) (range mode) was not functional in 4.98, now it is fixed
Fixed calculation of profit of leveraged instruments denominated in non-base currency when dynamic fx rate was used
Private heap allocator implemented for quotes and for trading signals
This should resolve problem of getting "out of memory" problem that could occur during very long optimizations due to poor handling of virtual memory in Windows.

CHANGES FOR VERSION 4.98.0 (as compared to 4.97.0)

N-tick intervals from View->Intraday menu are enabled again in tick databases (were disabled in 4.97 only)
AFL: Status() function: 2 new fields added

" axisminy" - retrieves the minimum (bottom) value of Y axis (indicators only)
" axismaxy" - retrieves the maximum (top) value of Y axis (indicators only)

Example 1:

Title = "Axis Min Y = " + Status("axisminy") + "Axis Max Y = " + Status("axismaxy");

Example 2:

SetChartOptions( 3, 0, ChartGridMiddle ); axismin = Status("axisminy"); axismax = Status("axismaxy"); Plot( C, "Price", colorBlack, styleBar ); // draw exactly 5 grid lines for( i = 0; i < 5; i++ ) { y = axismin + i * (axismax - axismin)/4; PlotGrid( y, colorRed ); }
HTML export / import now store extra information about the kind of file exported so when you export optimization result and re-import it later you will be able to use optimization graph (FC#: 1029)
HTML import: sometimes when importing large files duplicate rows appeared at the end - now it is fixed (FC#1024)
Fixed formatting of numeric values above 100000 after HTML import when comma used as thousands separator (FC#: 1029)
Added protection against using file-system reserved characters (*?#:|></"\) in watch list names
Implemented 5-tier commission schedule table in backtester (AA->Settings: Commission table : DEFINE...) (FC#270)
Account Manager: commission was not subtracted from equity when scaling-in position that was open in previous amibroker run, now it is fixed
Fixed problem with "Use only local database for this symbol" being set to "yes" during loading of the database with absent broker.master file

CHANGES FOR VERSION 4.97.0 (as compared to 4.96.0)

Range Bar compression implemented now (FC#: 210, 1041,897,284)

Range Bars are price-driven bars, with each bar having a required minimum high-low range. Source data are consolidated into one bar until the range requirement is reached, then a new bar is started. It works best with tick data that have only one price per data point. You can use it with other base time intervals as well, but please note that if single source bar H-L range exceedes desired range, the output will be single bar that has range higher than requested. In other words source bars exceeding desired range won't be splitted into several range bars. For example if you use 1 minute bars and there is $3 dollar movement and you have selected $1 range bars it won't be splitted into 3 bars. Instead you will get single bar with original $3 range.This is so because AB has no idea what happened *inside* the bar. Prices could move first downwards and later upwards or opposite or zigzaging several times or making any other pattern inside bar and this information is not available from source bar that only has OHLC prices. Note that range bar compression is not standarised. Some other softwares may attempt to split to several artificial bars when range is exceeded, but we belive it is wrong since it is based on assumptions about price action inside bar that may and usually are wrong.

Range bars can now be selected as custom compression from Tools->Preferences->IntradayRange bars are also available via TimeFrameMode() function

TimeFrameMode( 3 ); // turn on range bars TimeFrameSet( 1.5 ); // set compression to 1.5$ range bar
Mersene Twister MT19937 random number generator added
Two new AFL functions:

mtRandom( seed = Null ) - returns single random number (scalar) in the range [0,1)
mtRandomA( seed = Null ) - returns array of random numbers in the range of [0,1)

seed is random generator seed value. If you don't specify one, the random number generator
is automatically initialized with current time as a seed that guarantees unique sequence

Both functions use Mersene Twister mt19973ar-cok algorithm.
(Copyright (C) 1997 - 2002, Makoto Matsumoto and Takuji Nishimura.)

Mersene Twister is vastly superior to C-runtime pseudo-random generator
available via Random() function.

It has a period of 219973 = approx 2.9*106012 For more information visit:
http://www.math.sci.hiroshima-u.ac.jp/~m-mat/MT/emt.html

See also:
M. Matsumoto and T. Nishimura, "Mersenne Twister: A 623-Dimensionally Equidistributed Uniform Pseudo-Random Number Generator", ACM Transactions on Modeling and Computer Simulation, Vol. 8, No. 1, January 1998, pp 3--30.
AFL: PopupWindow() function added (FC#: 840)
SYNTAX:
PopupWindow( bodytext, captiontext, timeout = 5, left = -1, top = -1 );

bodytext - the string containing the text of the window body
caption - the string containing the text of window caption
timeout - auto-close time in seconds (default 5 seconds)
left - top-left corner X co-ordinate (default = -1 -means auto-center)
top - top-left corner Y co-ordinate (default = -1 - means auto-center)

Example code:
if( ParamTrigger("Display Popup Window", "Press here" ) ) { PopupWindow("Current time is: " + Now(),"Alert", 2, 640*mtRandom(), 480*mtRandom()); }
ASCII Importer: $TIMESHIFT option added (FC# 1094)
Added ability to time-shift data at the time of the import.

$TIMESHIFT shift_in_hours

For example:

$TIMESHIFT 2

will import with date/time stamps shifted 2 hours forward

$TIMESHIFT -11.5

will import with date/time stamps shifted 11 and half hour backward

Please note that only INTRADAY data (with TIME component provided) are shifted. EOD data (without time field) are unaffected.]
AFL: GetPlaybackDateTime() (FC#: 837)
pt = GetPlaybackDateTime(); // new function to retrieve playback position date/time, //returns zero if bar replay is NOT active if( pt ) { Title = "Playback time: " + DateTimeToStr( pt ); } else { Title = "Bar Replay not active"; }
It returns zero if bar replay is not active.
Fixed lockup when bar replay was attempted on base time interval = tick
Fixed passing IDispatch parameters to OLE/COM method calls
Fixed error message typo in SetCustomBacktestProc (FC: 1085) "exit" vs "exist"
3D optimization chart viewer: added 4x4 Full Screen Anti-Aliasing for beautifully smooth 3D charts and improved readability
4x4 Full-Screen Anti-Aliasing (FSAA) feature is available only on graphic cards that support this in hardware (all NVidia GeForce cards, and most recent graphic cards that have 3D acceleration). It is not available for low-end graphic cards sometimes found in the cheapest notebooks.
If FSAA is not supported by the hardware View->Anti-aliasing menu item will be disabled (grayed).
If FSAA is supported in hardware then it will be turned on by default.
Note that animation speed with FSAA turned on may be lower on slower graphic cards. If speed is not acceptable you can turn off anti aliasing by unchecking View->Anti-aliasing menu (or turning off "A" button in the toolbar) of 3D chart viewer (O3G.exe).

CHANGES FOR VERSION 4.96.0 (as compared to 4.95.0)

HTML Import to AA result list implemented (FC#579)
Note that this feature is intended to import only HTML files exported by AmiBroker. The HTML parser used is specifically written for this particular purpose and expects certain layout of HTML file. HTML files saved by other programs can not be imported. Use Automatic Analysis -> File -> Import to access this feature.
Account manager: added "per-trade" commission setting (FC#: 973)
Two new backtester modes that do not remove redundant signals (FC#: 105)
- RAW MODE: signal-based backtest, redundant (raw) signals are NOT removed, only one position per symbol allowed:
- RAW MODE WITH MULTIPLE POSITIONS - signal-based backtest, redundant (raw) signals are NOT removed, MULTIPLE positions per symbol will be open if BUY/SHORT signal is "true" for more than one bar and there are free funds, Sell/Cover exit all open positions on given symbol, Scale-In/Out work on all open positions of given symbol at once.
AFL: new function SetBacktestMode( mode )
Sets working mode of the backtester:
// default, as in 4.90, regular, signal-based backtest, redundant signals are removed SetBacktestMode( backtestRegular ); // signal-based backtest, redundant (raw) signals are NOT removed, only one position per symbol allowed SetBacktestMode( backtestRegularRaw ); // signal-based backtest, redundant (raw) signals are NOT removed, // MULTIPLE positions per symbol will be open if BUY/SHORT signal is "true" for more than one bar and there are free funds // Sell/Cover exit all open positions on given symbol, Scale-In/Out work on all open positions of given symbol at once. SetBacktestMode( backtestRegularRawMulti ); // rotational trading mode - equivalent of EnableRotationalTrading() call SetBacktestMode( backtestRotational );
AA window: custom draw buttons (with arrows) are redrawn on killfocus event to prevent flickering
Fix: when symbol is deleted from database it is removed from all new watchlists as well
Attempt to assign value to the element of the array named the same as the function inside the function declaration produces error 33 now instead of crash (FC#: 1011)
Clicking RMB->Watchlist->Remove inside watch list node was removing symbol from all watch lists. Now it is fixed.
Fixed cell text truncation that could happen randomly when using HTML export
Position of compound drawings (retracements/cycles) is updated correctly now when "Properties" dialog was choosen from without selecting the drawing via LMB click
Stops were reset to default values (from settings) when custom backtest routine was stored in separate file (not embedded or included in the formula). Now it is fixed

CHANGES FOR VERSION 4.95.0 (as compared to 4.94.0)

Added support for AFL Code Wizard (Analysis->AFL Code Wizard menu and toolbar button)

AFL Code Wizard is a new add-on for AmiBroker. It allows creation of trading system formulas without ANY programming experience. It is available for purchase for $49 one-time fee. Further upgrades are free. AmiBroker comes with trial version that has all functionality *including* export of auto-generated AFL formula to AmiBroker. The only missing feature in trial version of AFL COde wizardis saving the project in .awz format.

To run it select Analysis->AFL Code Wizard menu.

AFL Code Wizard instructional video can be found at: http://www.amibroker.com/video/amiwiz/AFLWiz1.html
Symbol Tree->Right click->Watch List->Type In works from any node now (FC#991)
Filter window supports more than 256 watchlists (FC#1006)
Aliases are properly recognized when adding symbols to new watchlists

CHANGES FOR VERSION 4.94.0 (as compared to 4.93.0)

AFL: 23 new low-level graphic functions allowing Windows GDI-like painting
Completely new low-level graphic AFL interface allows complete flexibility in creating any kind of user-defined display.

The interface mimics closely Windows GDI API, with same names for most functions for easier use for GDI-experienced programmers. The only differences are:
1. compared to Windows GDI all functions are prefixed with 'Gfx'
2. pen/brush/font creation/selection is simplified to make it easier to use and you don't need to care about deletion of GDI objects
3. Three overlay modes are available so you can mix low-level graphics with regular Plot() statements
(mode = 0 (default) - overlay low-level graphic on top of charts, mode = 1 - overlay charts on top of low-level graphic, mode =2 - draw only low-level graphic (no regular charts/grid/titles/etc))

Low-level graphics tutorial: http://www.amibroker.com/guide/h_lowlevelgfx.html

Available low-level gfx functions (click on the links for detailed explanation):
GfxMoveTo( x, y ) http://www.amibroker.com/f?gfxmoveto
GfxLineTo( x, y ) http://www.amibroker.com/f?gfxlineto
GfxSetPixel( x, y, color ) http://www.amibroker.com/f?gfxsetpixel
GfxTextOut( "text", x, y ) http://www.amibroker.com/f?gfxtextout
GfxSelectPen( color, width = 1, penstyle = penSolid ) http://www.amibroker.com/f?gfxselectpen
GfxSelectSolidBrush( color ) http://www.amibroker.com/f?gfxselectsolidbrush
GfxSelectFont( "facename", pointsize, weight = fontNormal, italic = False, underline = False, orientation = 0 ) http://www.amibroker.com/f?gfxselectfont
GfxRectangle( x1, y1, x2, y2 ) http://www.amibroker.com/f?gfxrectangle
GfxRoundRect( x1, y1, x2, y2, x3, y3 ) http://www.amibroker.com/f?gfxroundrect
GfxPie( x1, y1, x2, y2, x3, y3, x4, y4 ) http://www.amibroker.com/f?gfxpie
GfxEllipse( x1, y1, x2, y2 ) http://www.amibroker.com/f?gfxellipse
GfxCircle( x, y, radius ) http://www.amibroker.com/f?gfxcircle
GfxChord( x1, y1, x2, y2, x3, y3, x4, y4 ) http://www.amibroker.com/f?gfxchord
GfxArc( x1, y1, x2, y2, x3, y3, x4, y4 ) http://www.amibroker.com/f?gfxarc
GfxPolygon( x1, y1, x2, y2, ... ) http://www.amibroker.com/f?gfxpolygon
GfxPolyline( x1, y1, x2, y2, ... ) http://www.amibroker.com/f?gfxpolyline
GfxSetTextColor( color ) http://www.amibroker.com/f?gfxsettextcolor
GfxSetTextAlign( align ) http://www.amibroker.com/f?gfxsettextalign
GfxSetBkColor( color ) http://www.amibroker.com/f?gfxsetbkcolor
GfxSetBkMode( bkmode ) http://www.amibroker.com/f?gfxsetbkmode
GfxGradientRect( x1, y1, x2, y2, fromcolor, tocolor ) http://www.amibroker.com/f?gfxgradientrect
GfxDrawText( "text", left, top, right, bottom, format = 0 ) http://www.amibroker.com/f?gfxdrawtext
GfxSetOverlayMode( mode = 0 ) http://www.amibroker.com/f?gfxsetoverlaymode
AFL: Two new fields in Status() functions: pxwidth and pxheight (
Status("pxwidth") - gives pixel width of chart window (useful for low level graphics functions that operate on pixels)
Status("pxheight") - gives pixel height of chart window
Better scaling and no more black rectangle on the bottom in images created via Edit->Image->Copy / Export
"New Look" charts (switchable via Tools->Preferences "Charting") - give cleaner, larger and more readable chart display and printout
Printing/copy-metafile function uses now Enhanced Metafile format that handles clipping regions (styleClipMinMax)

CHANGES FOR VERSION 4.93.0 (as compared to 4.92.0)

Fixed exception that maight occur when copying to clipboard very long lines from AA result list
CategoryGetName() now returns empty string for non-existing categories instead of some uninitialized (random) string
Fixed exception when trying to apply commentary on blank chart pane
AFL editor fix: right Alt + z does not trigger 'undo' anymore (allows to enter Polish z (z-dot-above) letter)
Fixed exception occuring when Symbol Information was edited at the same time while first auto-analysis was run
Fixed bar replay not functioning when viewing interval was the same as base time interval and set to less than 5 minute, mixed mode was off, and no afterhours/weekend filtering was enabled (FC#: 899)
Fix: defined FXRate for the very first symbol in the database is used correctly now (FC#: 975)
When LoadFormula() method of Analysis object is called parameters are reset now (FC#: 958)
Ability to export Chart in "portable" format so you can distribute chart templates to others and they will be restored together with all linked formulas (FC#: 96)
This feature is available from RIGHT CLICK on chartTemplate->Save...Template->Load...
menus.

In addition to old local template format a new one is added with .chart extensionthat keeps not only window sizes and formula references (paths) but also formulas themselves,so all you need to do is to save your chart into one file (Chart Template, Complete *.chart)and copy that file onto different computer and chart will be recreated with all formulas linked to it.

To Save chart into new format do the following:

1. Click with RIGHT MOUSE button over the chart and select Template->Save...

2. In the file dialog, "Files of type" combo select "Chart Template, Complete (*.chart)"

3. Type the file name and click Save.

To load previously saved complete chart do the following:

1. Click with RIGHT MOUSE button over the chart and select Template->Load...

2. In the file dialog, select previously saved *.chart file and press "Open"

Note: The procedure AmiBroker does internally is as follows: When you save the chart into new format it saves XML file with:

a) names of all sheets, panes, their sizes, locations and other settings
b) paths to all formulas used by all panes
c) the text of formulas themselves

When you load the chart in new format AmiBroker:
a) sets up the sheets/panes according to information stored in the file
b) for each formula stored in the file it checks if the same formula exists already on target computer:
- if it does not exist - it will create one
- if it exists and the contents is identical to the formula stored in .chart file it will do nothing
- if it exists and the contents is different then it will create NEW formula filewith _imported.afl suffix (so old file is not touched) and will reference the pane to the _imported.afl formula instead.

IMPORTANT NOTE: if you use any #include files AmiBroker will store the contentsof include files as well inside chart file and will attempt to recreate them on target machine.Please note that in case of includes it will check if it exists and if it is different.If both conditions are met (different file exists already) it will ask to replace or not.If you choose to replace - it will replace and make backup of existing one with .bak extensionIf you are using any files in "standard include files and include them using <> braces, AmiBroker will restore files in target machine standard include folder as well evenif the standard include folder path is different on the source machine).

Note also - that this functionality is a bit experimental and pretty complex internally. There may be some bugs even though it was tested on number of different setups. Feedback is welcome. It is intended to be used to port charts between different computers. For storing layouts/templates on local computer you should rather use old formats as they consume much less space (they store only references,not the formulas themselves). One may however use new format for archiving purposes as itkeeps formulas and all references in one file that is very convenient for backups.

CHANGES FOR VERSION 4.92.0 (as compared to 4.91.1)

Watch list tooltips now show WL ordinal number (index), name and symbol count
new menu item "WatchLists->Hide Empty watchlists" allows to show/hide empty watchlists
Note that when you add new watch list AmiBroker will automatically unhide empty watch lists so you can see newly added list.
AFL: Category* functions work fine now with more than 256 watch lists
AFL: new function: CategoryFind() allows to search for category by name

SYNTAX: CategoryFind( "name", category )
RETURNS: number
FUNCTION: It allows to search for category by name. It takes category name and kind as parameters and returnsINDEX (ordinal number). For example it allows to find watch list index by name:

wlnumber = CategoryFind("MyWatch List 1", categoryWatchlist ); mysymbols = CategoryGetSymbols(categoryWatchlist, wlnumber );

The index (in the above example watch list number) can be later used in functions thatneed the index (like CategoryGetSymbols).
AFL: new function: InWatchListName() allows to reference watch list by name
It is equivalent to InWatchList function except that it takes watch list name as parameter instead of the index.

SYNTAX InWatchListName( "listname" )
RETURNS NUMBER
FUNCTION Checks if the stock belongs to a watch list having name of listname. If yes - the function returns 1 otherwise 0.
EXAMPLE

Filter= InWatchListName( "mywatchlist" ) OR InWatchListName( "mysecondwatchlist" );

Note that this function is a bit slower than InWatchList() function.
Fixed Watch List Export - now exports from selected watch lists (not only from watch list number zero)

If you select only one watch list to export then original symbol order is preserved, multiple watch list export uses alphabetical order to prevent duplicates.
Fixed Watch List Sorting - now sorts selected watch list (not only watch list number zero)

CHANGES FOR VERSION 4.91.1 (as compared to 4.91.0)

fixed symbol tree refresh after Watchlist->Import

CHANGES FOR VERSION 4.91.0 (as compared to 4.90.5)

AA: new options in the context menu "Replace watch list with the results/selected results"
This new option empties the watch list before adding results. The order of symbols in the result list is preserved in the watch list.
Watchlists: context (right click) menu - now there is no WL selection dialog displayed
If you select the watch list from symbol tree and click with RIGHT mouse button to bring up watch list menu the selected watch list is used automatically and watchlist selector dialog is not displayed.
Watchlists: redesign - now there is no limit on number of watch lists you can use
a) watch lists are now stored as text files inside "Watchlists" folder inside database. The folder contains of any number of .TLS files with watch lists themselves and index.txt that defines the order of watch lists. You can add your own .tls file (one symbol per line) and AmiBroker will update index.txt automatically (adding any new watch lists at the end)The .TLS files can also be open in AmiQuote.

b) watch lists remember the order in which symbols were added, so for example if you sort AA result list in some order and then you"add symbols to watch list" the order will be kept in the watch list.

c) you can now Add/Delete watch lists using Symbol->Watch List-> menu or from watch list context menuNote that if you have done any customization to the menu, you may need to go to Tools->Customize, select "Menu Bar" and press "Reset" button for this new menu items to appear.

d) you can now alphabetically sort the symbols in the watch list

e) all watch lists are shown in the symbol tree now, even if they are empty.

f) for backward compatibility OLE automation WatchListBits/WatchListBits2 properties of Stock object continue to work for first 64 watch lists (bit states are transparently emulated)

g) Watch lists created in 4.91 are not visible for older versions
When changing selected symbol, the tree is not traversed to the bottom (root). Instead only current branch is checked and if symbol is selected only if it is present under this branch (This prevents unnecessary unfolding of "All" and other branches)
AFL Editor: AUTOWORDSELECTION turned off
AFL: switch/case statement added (completed: 2007-03-31) (ext.ID: 580). More information: http://www.amibroker.com/guide/v50/keyword/switch.html

Example:

for( n = 0; n < 10; n++ ) { printf("Current n = %f\n", n ); switch(n) { case 0: printf("The number is zero.\n"); break; case 3: case 5: case 7: printf("n is a prime number\n"); break; case 2: printf("n is a prime number\n"); case 4: case 6: case 8: printf("n is an even number\n"); break; case 1: case 9: printf("n is a perfect square\n"); break; default: printf("Only single-digit numbers are allowed\n"); break; }
AFL: break/continue statements added (supported inside for/while/do-while/switch statements). More information:
http://www.amibroker.com/guide/v50/keyword/break.html
http://www.amibroker.com/guide/v50/keyword/continue.html

Example:

for(i = 1; i < 1000; i *= 2 ) { if( i > 50 ) break; printf("%f\n", i ); }
AFL: new C-like assignment operators +=, -=, *=, /=, %=, &=, |=
New operators are shortcuts for some common operations.

x += y; is equivalent to x = x + y;
x -= y; is equivalent to x = x - y;
x *= y; is equivalent to x = x * y;
x /= y; is equivalent to x = x / y;
x %= y; is equivalent to x = x % y;
x &= y; is equivalent to x = x & y; // bitwise and
x |= y; is equivalent to x = x | y; // bitwise or
Enanced display in Real Time Quote window (dual-step change coloring - when field changes it is highlighted with bright yellow for 0.25 second then color changes to pale yellow and after a while to default (white) background))

CHANGES FOR VERSION 4.90.4 (as compared to 4.90.3)

PointValue is now automatically set to 1 if FuturesMode is NOT enabled for given backtest (pre-4.90 behaviour)
Fixed crash @040ecde occuring when user incorrectly specifed NULL as a plot color (this is user error but anyway should not crash) (FC#: 848)
Fixed problem with data tips non displaying under some rare circumstances(FC#: 844)
Fixed problem with loading layout that referenced non-existing symbol
Max Title len increased to 9K characters (FC#: 534)
Changes made to color/Thickness/Style of LOCKED studies is saved now even if position did not change (FC#: 846)
Ticker bar now only needs pressing ESC once to lose focus (FC#: 842)

CHANGES FOR VERSION 4.90.3 (as compared to 4.90.2)

Fixed GIF export from OLE level when bitdepth was not specified (FC#816)
Notepad DEL key deletes one character now, not two (FC#817)
MDITab titles are refreshed properly after loading the layout (FC#811)
Layouts switching is faster

CHANGES FOR VERSION 4.90.2 (as compared to 4.90.1)

new account manager: fixed partial scaling out calcs
OLE automation server registration checks registry access rights correctly on Windows Vista now (this prevents "Failed to update registry. Try using REGEDIT" message on Vista)
Setup program now registers OLE servers by itself using elevated rights on Vista (programs run with ordinary rights do not have access to OLE registration on Vista)
AddToComposite: the combination of atcEnableInIndicator + atcDeleteValues now invalidates cached foreign data (FC#: 809)

CHANGES FOR VERSION 4.90.1 (as compared to 4.90.0)

Fixed exception @00435766 (displaying Interpretation for blank window)
Fixed exception @0044F999 (right click on title bar area on blank chart to delete non existing section)

CHANGES FOR VERSION 4.90.0 (as compared to 4.89.0)

Fixed problem with information window length constraint being set wrong sometimes. (for example TickSize in View->Information was limited
to 4 digits after entering Currency field)
Bar Replay current position static is now updated when changing start date
Fixed problem RTQ window stopped updating the symbol when it was listed twice in different tabs and removed from one (FC#: 439)
Fixed data tooltip display when xshift != 0 (FC#: 465)
Fixed vertical grid Z-order when graphgridzorder = 1 (FC#: 377)
Added "Use as default" box to Horizonal Line properties dialog - when checked, current drawing "show value" selection is stored as a default for all newly created horizontal lines (FC#: 389)
Added File->New->Pane (creates blank pane)
Added File->New->Blank chart (creates blank chart - you can drag-drop formulas on it)
Window->New Linked window menu has been replaced by File->New->Linked Chart
#30339 the limit of drawings per symbol has been increased from 5000 to 65000
[And contrary to previous (faulty) behaviour when limit is reached, you don't lose your previous drawings. Now you just can't save more than 65000 drawings per one symbol.]
Renamed Tools->Auto-update quotes (US & Canada) to Auto-update quotes (AmiQuote only) - new installations only
Removed Tools->Export to CSV - new installations only
Clipboard copy/paste now works OK on "Symbol ticker" combo (in the toolbar)
Warning message when deleting symbols changed to "Are you sure to delete current symbol from the DATABASE !"
Added open interest as a predefined formula
Account manager: 5-tier commission table added
Duplicate shortcut Alt+d for Edit / Define removed. Define now uses 'f' shortcut (FC#: 219)
BarReplay is now paused temporarily when user is drawing objects or printing
Thick dotted line is now plotted with geometic pen on Win2000/XP or higher (FC#: 720)
Fixed problem with passing HGDI handles when printing
Account manager cash calculation when scaling in fixed (FC#: 793)
Added styleNoRescale to Bollinger Bands in Price (all-in-one).afl
ASCII importer: volume is now NOT to adjusted when ADJCLOSE and CLOSE is used
[To turn on adjusting (old, pre-4.90 behaviour) you need to add $SPLITADJVOL 1 to command to ASCII importer definition]
FuturesMode setting set using SetOption #24503 works the same as in the settings dialog
[The difference was due to the fact that PointValue set in the Information window was not transfered to the formula when
Futures Mode was NOT set in the Settings dialog (further change by SetOption did not transfer it).
Now Point Value is transfered always.]

CHANGES FOR VERSION 4.89.0 (as compared to 4.88.0)

AFL: Static variables are now case insensitive (FC#: 663)
AFL: SetSortColumns() function (FC#: 607)
SetSortColumns( col1, col2, .... )

sets the columns which will be used for sorting.

col1, col2, ... col10 -Column numbers are ONE-based. Positive number means sort ASCENDING, negative number means sort DESCENDING. Upto 10 columns can be specified for multiple-column sort. Each subsequent call to SetSortColumns overwrites previous one.

Examples:

SetSortColumns( 5 ) - sort by 5th column in ascending order

SetSortColumns( -3 ) - sort by 3rd column in descending order

SetSortColumns( 1, -2 );
- sort by 1st column in ascending order and then by second column in descending order (multiple-column sort).
Web Research: Synchronization with currently selected symbol has now three options:
Don't sync - does not synchronize with currently selected symbol
Sync active - synchronizes only when web research is active (or becomes active by clicking on it)
Sync always - synchronizes web page always, even if web research window is not active - warning: resource intensive
New Account Manager added (completed: 2006-12-19)

Account manager provides ability to track your account portfolio. Account manager functionality provides superset of features offered by old portfolio manager, but still some things are left todo namely: multi-currency handling, more stats (backtest-like), multi-tiered commission schedules etc.

Short Instructions:

CREATE A NEW ACCOUNT:

Use File->New->Account menu to create new account

FUNDING AN ACCOUNT:

Before you do any trading, you have to fund your account. To do so press "FUNDING" button on the account manager toolbar, then select "Deposit" as operation type, enter the DATE when you have funded your account and enter the amount.
Note that funding date must PRECEDE any trading, as account manager won't allow you to trade prior to funding date. Initial deposit will show as "initial equity" in summary tab.

CHECK THE SETTINGS

It is good idea to go to "Summary tab" and setup commissions and trading mode. If this account is used for End-of-day trading you should set "EOD Mode" to YES, otherwise (if you trade intraday) you should set "EOD Mode" to NO. Depending on this setting Buy/Sell dialogs will allowyou to enter date and time of the trade or only date.

Commission schedule currently is only one-tier, in the future multiple-tier commission schedules will be possible.

ENTERING TRADES:

Once you funded an account you can enter trades.To buy (enter long position or cover short position ) click on "BUY" button.

Then in the Buy dialog you need to select the symbol, the trade date/time. Once they are entered AmiBroker will display price of given symbol at the selected date/time (or preceding one if no exact match is found). It will also calculate maximum possible quantity taking price and available funds into account.

You can change the price and quantity manually.

All other values (net market valye, commission, market deposit, currency, fx rate) are calculated or retrieved automatically from Symbol->Information page. Once values are good, click OK to confirm transaction. If you made mistake, you can press UNDO (Edit->Undo) to revert last transaction.

Similar procedure is for selling (entering short positions or closing longs) with the exception that you should press "SELL" button instead.

All transactions that you made are listed in the "Transactions" sheet. All open positions are listed in "Open Positions" sheet. If you enter the trade for symbol that has position already open, AMiBroker will adjust "open positions" accordingly (perform scaling in/out). Once open position is closed it is removed from "open positions" list and moved to "Closed trades" sheet.

After each transaction, "Equity history" sheet is updated with current account equity value and also "Summary" page is updated with basic open/long/short trade stats.(More stats are to come).

IMPORTANT:

You have to remember that you must enter all transactions in chronological manner(oldest first, newest last), as account manager won't allow you to add trades out-of-order. If you make mistake, there is one-level undo that you can use to revert to state before last transaction. If you made more mistakes, the only option is to close account without saving and re-open original file.

SAVING YOUR ACCOUNT DATA:

To save edits made to account use File->Save (or File->Save As to save under new name). Note that account files are NOT encrypted now, and it is quite easy to read the file for everyone who has the access to it. So make sure not to leave your files on some public computer. Password protection/encryption is planned but NOT implemented yet.

OPENING PREVIOUSLY CREATED ACCOUNT:

To open account file, go to File->Open, in the File dialog,select "Account (*.acx)" from "Files of type" combo-box, and select the account file you want to load.

MULTIPLE ACCOUNTS:

You can create/open multiple accounts at once (just use File->New->Account, File->Open many times).
Vertical selector line has now user-definable color / bold style and it is plotted behind all graphs so it does not affect readability
Use Tools->Preferences->Color to adjust selector line color and style
Charts: by default extra 3% space is added on the top of chart compared to previous versions (4.88 or earlier)
printf/strformat are now protected against buffer overrun (1024 bytes)
Scroll-Bar Zoom feature implemented (dragging left or right edge of chart scrollbar resizes it allowing to zoom in/out from the scrollbar) (FC#619)
[To turn it OFF use
Tools->Preferences "Charting" tab:
UNCHECK "Enable Scroll Bar Zoom" box.]
RequestTimedRefresh() was not always starting up correctly since 4.86 - fixed now.
Range markers are now green (begin) and red (end) and are plotted with lines with small 'flag-like' rectangle at the end
When user types non-existing symbol in ticker box, AmiBroker asks whenever it should be added or not
This allows very quick adding of new symbols directly from ticker box.
Just type symbol and press ENTER - if it does not exist - it will be added and backfilled if you use real time data source
When adding/deleting symbols, charts displayed keep selected symbol
Added ability to create composites (using AddToComposite) inside indicator code via new atcFlagEnableInIndicator flag (FC#: 191)
AA window: now 'Sync chart' box is hidden when result list is maximized
AFL: Implemented Say("text") function that speaks provided text (Windows XP, on lower-end Windows you need to install Microsoft Speech API, voice settings are in Windows Control Panel)
Example:

Say("Testing text to speech engine");

CHANGES FOR VERSION 4.88.0 (as compared to 4.87.1)

Automatic Analysis window: Added "Sync chart on select" checkbox
when turned ON, selection of any line from result list automatically synchronizes (displays) relevant chart. Selection can be made not only by mouse but also by keyboard effectivelly allowing you to scroll through AA result list using key down button and charts will be switching automatically. Also when you press SPACE button, the arrows for selected trade/signal will appear (only after backtest / scan)
AFL Lexer code optimizations
Removed strncmp() C runtime calls from lexer and replaced it with hand optimized code, gives on average 15% speed improvement on AFL execution on larger formulas. NB. multi-line comment handling is speeded up this way as much as 7 times.
Bar Replay feature implemented (Tools->Bar Replay)
Bar Replay feature plays back data for ALL SYMBOLS at once. It means that data for all symbols will end at specified "playback position".This affects all formulas (no matter if they are used in charts or auto-analysis).

Controls description:

|<< - rewinds back to the beginning
< - one step back
[ ] - stop - turns bar replay OFF (chart are not affected by bar reply)
|| - pause - pauses current playback or enters pause mode that allows to manually drag the slider bar and affect chart display - in PAUSE mode data are internally modified so quotes past selected "playback" position are invisible to any part of AmiBroker ( charts / automatic analysis ), except quotation editor
> Play - playback bars history
> - one step forward
>> | - goes to end of selected range

Slider bar - allows to see the playback progress as well as MANUALLY move back and forward by dragging the slider thumb.

Start/End - controls provide start and end simulation dates. The playback works so that all data UPTO currently selected "Playback position" are visible. Data past this position are invisible. "Playback position" can change from user-defined "Start" to "End"dates. The small ^ buttons on the right side of Start / End date fields allow to set Start/End to currently selected date on the chart.

Step interval - defines interval of the step. Recommended setting is base interval of your database. So if you have 1-minute database, step interval should be 1 minute. If you have EOD database, step interval should be daily, however it is allowed to select higher step intervals. Note that chart viewing interval is independent from that. So you can playback 1 minute database and watch 15 minute bars (they will look like real - building last "ghost" bar as new data come in)

Speed parameter defines step frequency. It means how many steps will be played back within one second.Default is 1. Maximum is 5 minimum is 0.1. If you select 3 for example, AmiBroker will play one step every 0.333 sec giving total of 3 steps per second.

Skip afterhours - when turned on, playback skips hours outside regular trading hours as defined in File->Database Settings->Intraday Settings

Skip weekends - when turned on, playback skips Saturdays and Sundays

To ENTER PLAYBACK mode - press PLAY or PAUSE buttons - then data are truncated at current "playback position")To EXIT PLAYBACK mode - press STOP button or close Bar Replay dialog - the full data set will be restored.

Note that playback simulation is done internally and the database is kept untouched in fact (all data are still visible in Quote Editor), so there is no risk using Bar Reply.
Added Insert->Select to Tools->Customize->Keyboard command list to allow customers to add keyboard accelerator to this action
Fib. TIME extensions , "lock position" now works correcly. Also "bold" attribute can be now applied

CHANGES FOR VERSION 4.87.1 (as compared to 4.87.0)

fixed symbol tree, right mouse click on the watch list causing exception

CHANGES FOR VERSION 4.87.0 (as compared to 4.86.0)

Added "Request data on save" checkbox to File->Database Settings->Intraday Settings
When this is turned ON, AmiBroker will query data plugin for fresh data when saving database. This ensures that all collected real time data is transferred to AmiBroker's own database.
Caveats:
1. if external data source uses automatic backfill - it may cause triggering backfills during saving 2. turning this feature ON may slightly increase CPU load
Recommendations:
Generally speaking all data sources with no backfill or slow backfill should turn ON this feature,others (with fast backfill covering long histories) should have this turned OFF.
IB plugin: recommended setting: ON
This feature is designed specifically with IB plugin in mind as it has very limited backfill capabilities and it is good to savedata so it does not need to be re-filled on next session.
eSignal plugin: recommended setting: OFF
Using eSignal with this feature turned on may cause excessive backfills and exceeding eSignal symbol limit
IQFeed plugin: recommended setting: OFF
DDE plugin: recommended setting: ON
Fixed minor save on exit problem
New menu options
1. File->New -> Default Chart replaces Window->New
2. File->New -> Web Browser - creates new web browser window tab
3. File->New -> Account - creates new account manager window (still in development, not available now) (Tools->Portfolio manager will soon become obsolete)
4. File->New -> Database - replaces File-> New database
5. File->Save / Save As.- allows to save current document (such as HTML page from the browser, or account information (in development))
6. File->Save All - saves ALL modified, open documents including all open formula files
7. File->Close - closes currently open document (chart, browser or account)

Removed View->Profile menu option as it is now replaced by superior File->New->Web Research
Added Web Research window: multi-tab web browser with multiple built-in financial sites templatized shortcuts
This feature effectively replaces and extends previous View->Profile functionality that allowed to view single symbol profile web page. Now via File->New -> Web Research you can open multiple (unlimited) tabbed web browsers that allow to display unlimited(user configurable in Tools->Customize->Web Pages. In addition to that the browser now features regular "Address" bar that allows to type ANY URL address and use it as regular web browser.
" Open in New Window" option available from right click menu now opens new web browser inside tab.
" Sync" button when activated synchronizes web page with currently selected symbol, so you can browse for example profiles of different symbols by simply switching active symbol from the tree or combo box, without having to type complex URL addresses.
Added Customizing of Web Research addresses in Tools->Customize->Web Pages dialog
Configuration data are stored in webpages.cfg plain text file that holds any number of URL templates in the form of:

URLTemplate|Description

Description part is optional.URL template may use {t} marker that will be replaced in runtime with currently selected ticker. For more info see:http://www.amibroker.com/guide/h_profiles.html(note that old profile window is no longer available however, the URL template encoding remains the same)
Added ability to turn off MDI tabs (Tools->Customize->Appearance "Show MDI tabs") - note however that it is not recommeded to turn them off since window navigation will be more difficult
Added Symbol->Next Sibling / Symbol->Prev Sibling commands to Tools->Customize->Keyboard page (FC#.ID: 550)
This allows to navigate through symbols WITHIN selected category. On NEW installations it will default to Alt+Shift+Left arrow/Right arrow
Fixed "Remove" button positioning in Organize assignments dialog
Fixed combo box contents when "Indexes" are choosen in Assignment organizer
Implemented File->Save All - which saves all open, MODIFIED documents/files, including AFL formulas
Note that because there is no editing functionality for HTML pages (Web Research window) they are never in modified state, so they never get saved using "Save All". To save HTML page you need to manually do Save on selected HTML doc.
Pane Up/Pane Down function does not change the original height of panes moved

CHANGES FOR VERSION 4.86.0 (as compared to 4.85.0)

Added 'every tick' RT chart refresh in Professional Edition to already existing 1-sec and up refresh intervals
To enable 'every tick' chart refresh in Professional Edition, go to Tools->Preferences, Intraday tab and enter ZERO (0) into "Intraday chart refresh interval" field. (note Standard Edition won't allow to do that).

Once you enter zero, AmiBroker will refresh all charts with every new trade arriving provided that the formulasyou use execute fast enough. If not, it will dynamically adjust refresh rate to maintain maximum possible refresh rate without consuming more than 50% of CPU (on average). So for example if your charts take 0.2 sec to execute AmiBrokerwill refresh them on average 2.5 times per second.

Note: built-in Windows Performance chart shows cumulated CPU consumption for all processes, to display PER-PROCESS CPU load use SysInternals free software http://www.sysinternals.com/Utilities/ProcessExplorer.html
MDI tabs implemented
AFL: Added GetPerformanceCounter( bReset = False ) function

SYNTAX: GetPerformanceCounter( bReset = False )

RETURNS: Number

GetPerformanceCounter retrieves the current value of the high-resolution performance counter. Returned value is in milliseconds. Resolution is upto 0.001 ms (1 microsecond).The value of high-resolution counter represents number of milliseconds from either system start (boot) or from last counter reset.To reset the counter you need to call GetPerformanceCounter function with bReset parameter set to True. Note that reseting counters inside one formula does not affect counters in other formulas.Since returned values are very large (time in milliseconds since system start is usually quite large), for precise measurements of single function or small function block execution times it is strongly recommended to reset counter at the beginning of the block so floating point resolution (7 digits) does not affect the precision of measurement. Example:

GetPerformanceCounter(True); // reset counter to zero for( i = 0; i < 1000; i++ ) { k = sin( i ); } elapsed=GetPerformanceCounter(); "Time [ms] = "+elapsed;

The code above shows that 1000 iterations of sin() calculation takes about 1.7 milliseconds. Note that call to the GetPerformanceCounter() has overhead of about 0.015 ms (15 microseconds)
GetPerformanceCounter function may also be used to report time since system start:
elapsed=GetPerformanceCounter(); StrFormat("Time since system start %.0f days, %.0f hours, %.0f minutes, %.0f seconds, %.0f milliseconds ", floor(elapsed/(24*60*60*1000)), floor( elapsed/(60*60*1000) ) % 24, floor( elapsed/(60*1000) ) % 60, floor( elapsed/1000 ) % 60, elapsed % 1000 );

It can be also used in trading system automation to measure time in milliseconds between various events (just subtract values returned by GetPerformanceCounter() during two different events)

Caveat: this function relies on Windows API QueryPerformanceCounter function and CPU RTDSC instruction and it may yield to inaccurrate results if you have multiple-core processor and AMD's "Cool and Quiet" enabled in BIOS or other CPU clock stepping technologies enabled. If this applies to you, you may check Microsoft hotfix to this problem at: http://support.microsoft.com/?id=896256
Fixed crash that sometimes occurred when chart using RequestTimedRefresh() was closed
Added "Cancel" button to "Do you want to save database: Yes/No" dialog that appears on AB exit when database is modified
Added registry key for controlling built-in exception handling.

If you are 3rd party developer working with Visual C++ debugger and wanting exceptions to be caught by Visual Studio debugger instead of AmiBroker's built-in crash recovery system contact AmiBroker support and we will provide instructions how to disable it.
AFL: atan2( y, x ) implemented

atan2 returns the arctangent of y/x. If x is 0, atan returns 0. If both parameters of atan2 are 0, the function returns 0. While atan returns a value in the range –PI/2 to PI/2 radians; atan2 returns a value in the range –PI to PI radians, using the signs of both parameters to determine the quadrant of the return value.
AFL: FFT( array, size = 0 ) function implemented

FFT( array, len = 0 )

performs FFT (Fast Fourier Transform) on last 'len' bars of the array, if len is set to zero, then FFT is performed
on entire array. len parameter must be even.

Result:

function returns array which holds FFT bins for first 'len' bars. There are len/2 FFT complex bins returned,
where bin is a pair of numbers (complex number): first is real part of the complex number and second number
is the imaginary part of the complex number.

result = FFT( array, 256 );

where:
0th bin (result[0] and result[1]) represents DC component,
1st bin (result[1 ] and result[2]) represents real and imaginary parts of lowest frequency range
and so on upto result[ len - 2 ] and result[ len - 1 ]

remaining elements of the array are set to zero.

FFT bins are complex numbers and do not represent real amplitude and phase. To obtain amplitude and
phase from bins you need to convert inside the formula. The following code snipplet does that:

ffc = FFT(data,Len); for( i = 0; i < Len - 1; i = i + 2 ) { amp[ i ] = amp[ i + 1 ] = sqrt(ffc[ i ]^ 2 + ffc[ i + 1 ]^2); phase[ i ] = phase[ i + 1 ] = atan2( ffc[ i + 1], ffc[ i ] ); }

IMPORTANT note: input array for FFT must NOT contain any Null values. Use Nz() function to convert Nulls to zeros
if you are not sure that input array is free from nulls.

Example formula:

SetBarsRequired(100000,100000); Len = Param("FFT Length", 1024, 64, 10000, 10 ); Len = Min( Len, BarCount ); x = BarIndex(); x1 = x - BarCount + Len; input = C; a = LastValue( LinRegIntercept( input, Len - 1 ) ); b = LastValue( LinRegSlope( input, Len - 1 ) ); Lr = a + b * x1; data = input - Lr;// de-trending ffc = FFT(data,Len); for( i = 0; i < Len - 1; i = i + 2 ) { amp[ i ] = amp[ i + 1 ] = sqrt(ffc[ i ]^ 2 + ffc[ i + 1 ]^2); phase[ i ] = phase[ i + 1 ] = atan2( ffc[ i + 1], ffc[ i ] ); } auto = ParamToggle("Auto dominant cycle", "No|Yes", 1 ); sbar = Param( "Which FFT bin", 1, 0, 50 ); skipbin1 = ParamToggle("Skip 1st FFT bin", "No|Yes", 1 ); if( auto ) { sbar = int( LastValue(ValueWhen( amp == LastValue(Highest( IIf( skipbin1 AND x < 4, 0 , amp ) )), x / 2 )) ); } fv = Status("firstvisiblebar"); thisbar = Ref( int(x/2) == sbar, -fv); Plot( Ref(amp,-fv), "amplitude (bin " + Ref( int(x/2), -fv ) +")", IIf( thisbar, colorRed, colorBlack ),styleArea); Plot( IIf( BarCount - BarIndex() < Len, data, Null ) ,"de-trended input ("+Len+" bars)", colorOrange, styleLeftAxisScale ); Plot( cos( phase[ sbar * 2 ] + (sbar) * x1 * 2 * 3.1415926 / Len ), " dominant cycle "+ Len/(sbar) + "(" + sbar + " bin) bars", colorBlue, styleOwnScale ); GraphZOrder=1; GraphXSpace = 10;
Fixed: pre-defined color table in broker.prefs sometimes got corrupted
Repainting of RT quote window is now flicker-free on Windows XP and higher
Symbol->Organize assignments, added ability to remove multiple symbols at once from watch list, index and favourite categories

CHANGES FOR VERSION 4.85.0 (as compared to 4.84.0)

AFL: Added DateTimeConvert function (FC#: 297)
DateTimeConvert( format, date, time = Null )

The function allows to convert from DateTime format to DateNum and TimeNum and vice versa.

format parameter controls the direction of conversion:

format = 0 - converts DateTime format to DateNum format, example

mydatenum = DateTimeConvert( 0, DateTime() );// - this returns DateNum

date argument should be in datetime formattime argument in this case should not be used

format = 1 - converts DateTime format to TimeNum format, example:

mytimenum = DateTimeConvert( 1, DateTime() ); // - returns timenum

date argument should be in datetime formattime argument in this case should not be used

format = 2 - converts from DateNum and optionally TimeNum to DateTime format, example:

mydatetime = DateTimeConvert( 2, DateNum(), TimeNum() );

date argument should be in datenum formattime argument (optional) should be in timenum format. In case of EOD data you can skip time argument:

mydatetime = DateTimeConvert( 2, DateNum() );
K-ratio is now reported with 4 decimal places (FC#: 357)
Added 'left side' display option to horizontal line labels and fixed problem with label sometimes disappearing (completed: 2006-08-15) (FC#: 342)
AFL: fgetstatus( filename, what, format = 0 )
Implemented

fgetstatus( filename, what, format = 0 )

function that retrieves file properties/status.

Returns NUMBER or STRING depending on format parameter
If file does not exist it returns Null.

Parameters:

filename - the name of the file (with or without full path) to query
what - specifies what file property to retrieve, allowable values
0 - the date/time the file was created
1 - the date/time the file was last modified
2 - the date/time the file was last accessed for reading
3 - the file size in bytes
4 - attribute byte of the file

format - specifies return format of date/time values (format specifications are the same as in Now() function):
allowed values:
0 - returns string containing date/time formatted according to system settings
1 - returns string containing date only formatted according to system settings
2 - returns string containing time only formatted according to system settings
3 - returns DATENUM number with date
4 - returns TIMENUM number with time
5 - returns DATETIME number with date/time
6 - returns date DAY (1..31)
7 - returns date MONTH (1..12)
8 - returns date YEAR (four digit)
9 - returns date DAY OF WEEK (1..7, where 1=Sunday, 2=Monday, and so on)
10 - returns date DAY OF YEAR (1..366)

Note that Windows supports only 2 second resolution of file date/time stamps.

Example:

// get modification date string of portfolio.afl file fgetstatus("formulas\\Equity\\portfolio.afl",1,0);
AFL: GetTradingInterface uses WaitForInputIdle now instead of fixed interval wait when launching IB interface
Disabled snapping to pixel resolution after manual editing of drawings #32071

CHANGES FOR VERSION 4.84.0 (as compared to 4.83.1)

Added GradientFillSlow code to support gradients on printers and metafiles which do not support them natively (completed: 2006-07-28)
Added GraphGridZOrder variable to control when grid lines are plotted (completed: 2006-07-31) (ext.ID: 351)
When you specify
GraphGridZOrder = 1;
then grid lines are plotted on top of any charts
AFL: new function RequestTimedRefresh( interval, onlyvisible = True ) (completed: 2006-08-06)

RequestTimedRefresh( interval, onlyvisible = True )

- causes given indicator window to refresh automatically every <interval> seconds regardless of data source used or connection state.

interval parameter defines timeout in seconds between refreshes. AmiBroker attempts to align refreshes to second boundaryso if you call it RequestTimedRefresh( 5 ) you should get refreshes at 0, 5, 10, 15, 20, 25, 30, 35, 40, 45, 50 and 55 second of the minute.Due to the way how regular (low overhead) timers are implemented in Windows they have accurracy of +/-55ms providedthat CPU is not very busy. Don't expect to get first line of your code to execute exactly at .000 milliseconds. This varies depending on machine load, number of quotes, system time slice and tens of other factors.Usually (on my testing machines) the first line of the code executes anywhere in the first 100 ms of the second, provided that other processes do not interfere. Windows is not real-time operating system and it does not guarantee any fixed execution/reaction times.

onlyvisible parameter set to True (default value) means that refreshes are triggered only for visible and not minimised windows. This applies also to main AmiBroker window - when it is minimised charts are NOT refreshed by default. To force refreshes when window is minimised you need to set this parameter to False. Note that this visibility applies to mostly to 'minimised' state or the situation when you move chart outside the boundary of physical screen so it is not visible to an eye but still open. It does not apply to chart windows that are on placed on inactive sheets, as they do not really exist until they are shown (this way AmiBroker conserves memory and CPU) and as non-existing, can not be refreshed.

Example:

RequestTimedRefresh( 5 ); // automatically refresh this particular chart every 5 seconds

Hint: to detect whenever given refresh comes from timer or user action you can use Status("redrawaction") function. It returns 0 for regular refresh (user action) and 1 for timer-refresh
AFL: Status("redrawaction") added (completed: 2006-08-06)
Status function now supports new field: redrawaction

Status("redrawaction")

It returns 0 (zero) for regular refreshes, and 1 for refreshes triggered via RequestTimedRefresh(). Note that in the future more return values can be added.

Example:

if( Status("redrawaction") ==1 ) { _TRACE("\nTIMED REFRESH"+Now()); } RequestTimedRefresh(1);
CreateStaticObject() actually calls internal CreateStaticObject :-) - for some reason it was calling regular CreateObject() instead. (completed: 2006-07-27)
Fixed problem with HoldMinDays sometimes allowing exit too soon (completed: 2006-07-29)
Fixed: Custom metric sort problem in optimization result list (occurred in 4.83 only) (completed: 2006-07-29) (ext.ID: 345)
Pane resizing algorithm changed so if you drag the divider between panes only neighbouring panes are resized (others remain unchanged)
Real time quote parent window has WS_CLIPCHILDREN style in order to fix some minor redraw issue (completed: 2006-07-31)

CHANGES FOR VERSION 4.83.1 (as compared to 4.83.0)

Fix to FC#302 caused problems with calling COM properties with parameters. This is now fixed.

CHANGES FOR VERSION 4.83.0 (as compared to 4.82.0)

Added detection of multiple copies of plugins for the same data source (completed: 2006-07-26)
This (multiple copies of the plugins for same data source) was causing problems and lots of support issues because people were using old plugins even if they installed (newer) copy of the plugin. This was so becasue AB always used first one encountered in given directory and it usually was the oldest one. Now AB displays warning message that there are multiple copies of the same plugin and then they must be renamed or removed.
Added HoldMinDays and EarlyExitDays options to SetOption() (completed: 2006-07-27)
In addition to already exitsing functionality of HoldMinBars / EarlyExitBars, new options to specify min hold/penalty period in CALENDAR DAYS (as opposed to bars).

SetOption("HoldMinDays", 30 ); // set minimum holding period to 30 calendar days SetOption("EarlyExitDays", 90 ); // set penalty period to 90 calendar days

Note that you can use one or another (not both at the same time) for one parameter, so you can specify minimum holding period in either days or bars (but not both at the same time). The same with EarlyExit period. You may however use different specifications (i.e. days/bars) for EarlyExit and HoldMin (they are independent from each other).
Added scoreExitAll constant that causes rotational mode backtester to exit all positions regardless of HoldMinBars (completed: 2006-07-27)
Note that this is global flag and it is enough to set it for just any single symbol to exit all currently open positions, no matter on which symbol you use scoreExitAll (it may be even on symbol that is not currently held). By setting PositionScore to scoreExitAll you exit all positions immediatelly regardless of HoldMinBars setting.

Example:

PositionScore = ..your normal score.. // if market timing signal goes negative close all posiitons PositionScore = IIf( MarketTimingSignal < 0, scoreExitAll, PositionScore );

NOTE: This flag works ONLY in rotational trading mode (in regular mode it is easy to generate such global exit by ORing sell signal with global sell signal).
CBT: Added ExitReason property to Trade object (completed: 2006-07-18) (FC#: 88)
Chart Tree - RMB - Edit - now restores and focuses to already opened formula editor (if it is during editing) (completed: 2006-07-24) (FC#: 300)
Note that you can still open NEW instance of the editor with the very same file (for comparison and to see the original contents) by holding down SHIFT key when choosing "EDIT" menu.
Eliminated extra unnecessary refreshes of commentary window when new symbol was picked from ticker selector (completed: 2006-07-24)
Fixed calling parameter-less JScript functions from AFL level via GetScriptObject() (completed: 2006-07-19) (FC #: 302)
Fixed: wrong estimated time in progress dialog when number of steps is greater than 2^32 (4294967296) (allocated to: 4.80.2) (completed: 2006-07-24)
AFL: Added Gradient background coloring (SetChartBkGradientFill function) (completed: 2006-07-26)
Gradient fill of chart interior is now available via SetChartBkGradientFill function.
Please note that this is independent from chart background color (background color fills entire pane, gradient fill is only for actual chart interior, so axes area is not affected by gradient fill)

SetChartBkGradientFill( topcolor, bottomcolor, titlebkcolor = default )

topcolor - specifies top color of the gradient fill
bottomcolor - specifies bottom color of the gradient fill
titlebkcolor - (optional) the background color of title text. If not specified then top color is automatically used for title background.

Example:

SetChartBkGradientFill( ParamColor("BgTop", colorWhite),ParamColor("BgBottom", colorLightYellow));
Multiple tabs in RTQ window (completed: 2006-07-18) (FC#: 22)
RT quote window tabs behave the same as chart tabs: can be renamed with right mouse button and dragged from one place to another.
20 tabs are currently available.
Non-numeric custom trade metrics are not formatted with thousands separators anymore (completed: 2006-07-21) (FC#: 314)
now Tools->Preferences->Misc "Decimal places in RT quote window" allows to specify upto 6 decimal places. (completed: 2006-07-25)
OLE: Fixed default property (Item) marker for Windows collection (completed: 2006-07-18)
Progress dialog: now estimated time is displayed in years/days if it is large enough (completed: 2006-07-24)

CHANGES FOR VERSION 4.82.0 (as compared to 4.81.1)

OLE: Quotations collection does not have _Item hidden property so it should fix problems with Delphi
OLE: fixed Documents collection Item method returning always first document object regardless of parameter value
OLE: Documents collection prepared to support multiple document types

OLE Added Windows collection, Document property and Activate and Close methods to Window object (FC #272)

Windows collection has one method:

Add - adds new window

and two properties:

Count - returns the number of windows within given document

Item( i ) - returns the i-th window object

Window object has two new methods:

Activate() - makes window active (focused)
Close() - closes given window

and one new property:

Document - gives parent document object

EXAMPLE CODE (JScript):

outBuffer = ""; // global output string buffer

function output( string )
{
   outBuffer = outBuffer + string + "\n";
}

AB = new ActiveXObject( "Broker.Application");

Docs = AB.Documents;
DocsQty = Docs.Count;

for( i = 0; i < DocsQty; i++ )
{
   Doc = Docs( i );

   output( "Document " + i + " name : " + Doc.Name );

   Windows = Doc.Windows;
   WinsQty = Windows.Count;

   for( j = 0; j < WinsQty; j++ )
   {
	    Win = Windows( j ); 

		output( "  Window " + j + " Selected tab " + Win.SelectedTab );
   }

} 

WScript.echo( outBuffer );

WScript.echo( "Now will add one window" );
Doc = Docs( 0 );
Windows = Doc.Windows;

NewWindow = Windows.Add();

WScript.echo( "and close it" );

NewWindow.Close();

New menu Symbol->Favorities and new item "Erase favourities" to empty the list of favourities (FC#: 280)
Horizonal line value label added (use new Study properties -> Show Y Value checkbox available for horizonal lines) (FC# 271)
Fixed crash when clicking on Watch List using RMB (problem occurred in 4.81 beta) (FC# 243)
Fix: Status('lastvisiblebarindex") and Status("lastvisblebar") now return zero based index instead of one-based (FC# 265)
Fix: removed spikes from styleCloud when plotted in non-continouous way (with nulls in the middle of the array) (FC# 283)
Fix rounding problem in AA in futures mode when difference between entry and exit prices was very small and pointvalue large (added extra rounding to profit calculation) (FC# 135)
Delete key now works in real time quote window (FC# 266)
AddTextColumn produces now LEFT-justified output (FC# 291)

CHANGES FOR VERSION 4.81.1 (as compared to 4.81.0)

fixed problem with some of the watch lists not showing up in 4.81.0

CHANGES FOR VERSION 4.81.0 (as compared to 4.80.2)

Database structure changed to hold new fundamental data - quarterly EAT/EBT/Sales figures, Code and Nominal value have been replaced by new fields.

Despite these changes files are still backward and forward compatible - so it can be read by any other AB version, the only minor inconvenience is that if you load new file into old version (pre-4.81) of AmiBroker you will see weird numbers in old "Finances" dialog as well as in "Shares out." and "Book Value" fields.
Implemented new View->Information property page featuring extra fundamental data fields
OLE: added new fundamental data fields to Stock object

Stock object has now the following properties:

string Ticker;
Collection Quotations;
string FullName;
boolean Index;
boolean Favourite;
boolean Continuous;
long MarketID;
long GroupID;
float Beta;
float SharesOut;
float BookValuePerShare;
float SharesFloat;
string Address;
string WebID;
string Alias;
boolean IsDirty;
long IndustryID;
long WatchListBits;
long DataSource;
long DataLocalMode;
float PointValue;
float MarginDeposit;
float RoundLotSize;
float TickSize;
long WatchListBits2;
string Currency;
string LastSplitFactor;
DATE LastSplitDate;
float DividendPerShare;
DATE DividendPayDate;
DATE ExDividendDate;
float PEGRatio;
float ProfitMargin;
float OperatingMargin;
float OneYearTargetPrice;
float ReturnOnAssets;
float ReturnOnEquity;
float QtrlyRevenueGrowth;
float GrossProfitPerShare;
float SalesPerShare;
float EBITDAPerShare;
float QtrlyEarningsGrowth;
float InsiderHoldPercent;
float InstitutionHoldPercent;
float SharesShort;
float SharesShortPrevMonth;
float ForwardDividendPerShare;
float ForwardEPS;
float EPS;
float EPSEstCurrentYear;
float EPSEstNextYear;
float EPSEstNextQuarter;
float OperatingCashFlow;
float LeveredFreeCashFlow;
AFL: new function GetFnData() - allows accessing fundamental data

SYNTAX: GetFnData("field")
RETURNS: number

"field" can be one of the following:

"EPS"
"EPSEstCurrentYear"
"EPSEstNextYear"
"EPSEstNextQuarter"
"PEGRatio"
"SharesFloat"
"SharesOut"
"DividendPayDate"
"ExDividendDate"
"BookValuePerShare"
"DividendPerShare"
"ProfitMargin"
"OperatingMargin"
"OneYearTargetPrice"
"ReturnOnAssets"
"ReturnOnEquity"
"QtrlyRevenueGrowth"
"GrossProfitPerShare"
"SalesPerShare"
"EBITDAPerShare"
"QtrlyEarningsGrowth"
"InsiderHoldPercent"
"InstitutionHoldPercent"
"SharesShort"
"SharesShortPrevMonth"
"ForwardDividendPerShare"
"ForwardEPS"
"OperatingCashFlow"
"LeveredFreeCashFlow"
"Beta"
"LastSplitRatio"
"LastSplitDate"
ASCII importer: added support for new fundamental data fields :

$FORMAT command now supports additional fields:

DIV_PAY_DATE
EX_DIV_DATE
LAST_SPLIT_DATE
LAST_SPLIT_RATIO
EPS
EPS_EST_CUR_YEAR
EPS_EST_NEXT_YEAR
EPS_EST_NEXT_QTR
FORWARD_EPS
PEG_RATIO
BOOK_VALUE (requires SHARES_OUT to be specified as well)
BOOK_VALUE_PER_SHARE
EBITDA
PRICE_TO_SALES (requires CLOSE to be specified as well)
PRICE_TO_EARNINGS (requires CLOSE to be specified as well)
PRICE_TO_BV (requires CLOSE to be specified as well)
FORWARD_PE (requires CLOSE to be specified as well)
REVENUE
SHARES_SHORT
DIVIDEND
ONE_YEAR_TARGET
MARKET_CAP (requires CLOSE to be specified as well - it is used to calculate shares outstanding)
SHARES_FLOAT
SHARES_OUT
PROFIT_MARGIN
OPERATING_MARGIN
RETURN_ON_ASSETS
RETURN_ON_EQUITY
QTRLY_REVENUE_GROWTH
GROSS_PROFIT
QTRLY_EARNINGS_GROWTH
INSIDER_HOLD_PERCENT
INSTIT_HOLD_PERCENT
SHARES_SHORT_PREV
FORWARD_DIV
OPERATING_CASH_FLOW
FREE_CASH_FLOW
BETA

(see Formats\aqfe.format and Formats\aqfn.format files for example usage)
Removed Stock->Information and Stock->Finances dialogs (this functionality is replaced by View->Information - new dockable property window)
AFL: new function StrReplace( string, oldsubstring, newsubstring )
Fixed crash occuring sometimes if "Symbol->Watch List->Type-in" symbol was longer than maximum allowable length (allocated to: 4.80.2)
Foreign() function changed. Now by default missing data bar OHL fields are filled using previous bar Close and volume is set to zero.
It is possible to turn old behaviour (filling missing bar OHL fields using previous bar OHL fields and copying previous bar volume) if you use
Fixup parameter set to 2.
Foreign("MSFT","O", 2 ); // old-style (pre-4.81) fill
Scaling-in profit% calculations modified to use total cost instead of max. pos value
ships with AmiQuote 1.90 featuring automatic download and import of fundamental data from Yahoo Finance. See AmiQuote\ReadMe2.html for the details.

CHANGES FOR VERSION 4.80.2 (as compared to 4.80.1)

Changed %profit calculation when scaling-in is used to use maximum number of shares ever held as a “base” of %profit calculation - this leads to “most conservative” % figures, compared to using just initial entry value.
Prec() function improved so it does not show rounding errors when working on integer

CHANGES FOR VERSION 4.80.1 (as compared to 4.80.0)

fixed problem with Easy Alert window not accepting new alerts in some circumstances
included new IB plugin version 1.6.2 (FC issue #54)

CHANGES FOR VERSION 4.80.1 (as compared to 4.80.0)

fixed problem with Easy Alert window not accepting new alerts in some circumstances
included new IB plugin version 1.6.2 (FC issue #54)

CHANGES FOR VERSION 4.80.0 (as compared to 4.79.0)

Added extra information to "detailed log" to show commissions charged during scaling and both average and current exit price
Partial exit (scale-out) profits are included now in trade stats
Fix EOD missing Friday if "Filter weekedns" is turned ON and Daily compression uses Night / Day session settings (#28659)
AFL Editor: Added F1 handling of for/while/do-while/if-else
"SCAN" now displays prices using 4 decimal places
Fixed problem with progress bar locking active window instead of AA window when in run-every mode
Fixed: Layouts messed up with multiple instances running (ext.ID: 3)
"Margin requirement" in the AA settings renamed to "ACCOUNT margin" to clearly show that it is NOT futures margin
Eliminated resource leak in ExportImage OLE function
Fixed potential thread interlock in Indicator Maintenance wizard (should prevent hangup especially on multi-CPU/core machines)
Indicator tables are written to file (broker.newcharts) after each chart insert, before and after Ind. Maintenance just to prevent data loss if AB is not closed properly
Symbol->Watch List->Import refreshes entire symbol tree, not only watch list leaf
added few new formulas into Formulas\Indicators folder

CHANGES FOR VERSION 4.79.0 (as compared to 4.78.1)

Added HoldMinBars feature that disables exit during user-specified number of bars even if signals/stops are generated during that period
Please note that IF during HoldMinBars period ANY stop is generated it is ignored. Also this period is ignored when it comes to calculation of trailing stops (new highest highs and drops below trailing stops generated during HoldMinBars are ignored).This setting, similar to EarlyExitFee/EarlyExitBars is available on per-symbol basis (i.e. it can be set to different value for each symbol)

Example:
SetOption("HoldMinBars", 127 ); Buy=BarIndex()==0; Sell=1; // even if sell signals are generated each day, //they are ignored until bar 128
additional checks added to ensure proper operation of individual equity chart
AA window generates error if it can not write LastBacktestFormula to the registry AA complains with error message when individual equity formula does not contain #include @LastBacktestFormula statement that is required for proper operation
(it includes the formula used in last backtest so Equity() function can process it)
AFL formula editor toolbar / menu is now customizable

Asc() function for converting first character of the string to the ASCII code

Asc( string, pos = 0 )

Returns the ANSI character code corresponding to the first letter in a string (if position is not specified) or code of character at specified position. If you don't specify position (pos argument) then first character is used. Negative values of pos reference characters counting from the end of string.

Useful for creation of exploration that displays single letters for signals instead of numbers.

Buy = Cross(MACD(),Signal()); Sell = Cross(Signal(),MACD()); Filter = Buy OR Sell; AddColumn( IIf( Buy, Asc("B"), Asc("S")), "Signal", formatChar );
Changed EarlyExitFee functionality so it does NOT affect equity (and stats like drawdowns) if position is not liquidated during early bars
Chart sheet tabs improvements: added drag-drop moving, quick selection menu, home/end buttons
Fix: double click on Y axis does not turn <> range markers anymore (allocated to: 4.79.0)
Fix: Param slider, when step =2 and start is odd (for example 3 ) then subsequent values were even (they should be odd 3, 5, 7,...) now it is fixed
Fixed handling of mixed color encodings in AddColumn (pre-defined color constants did not work together with ColorRGB / ColorHSB, now it is fixed)

Example of code that did not work correctly in 4.78.1 and earlier but now works fine.

Filter = 1; AddColumn(Close, "Close", 1.2, colorDefault, ColorRGB(255, 0, 0) ); // this works AddColumn(Close, "Close", 1.2, ColorRGB(0, 0, 255), ColorRGB(255, 0, 0)); // this works AddColumn(Close, "Close", 1.2, colorBlue, ColorRGB(255, 0, 0)); // this works in 4.79, but didn't in previous versions AddTextColumn(" ", " "); AddColumn(Close, "Close", 1.2, ColorRGB(255, 0, 0), colorDefault); // this works AddColumn(Close, "Close", 1.2, ColorRGB(255, 0, 0), ColorRGB(0, 0, 255) ); // this works AddColumn(Close, "Close", 1.2, ColorRGB(255, 0, 0), colorBlue); // this works in 4.79, but didn't in previous versions
Fractional increments on Y axis: added 1/320 increment (to use for example with ZT contract) and changed display method so integer part is separated from fractional part by ^ character
Implemented easy real-time alerts (allocated to: 4.79.0)
"easy alerts" are available from RTquote window context menu.
(Click on Real Time Quote window with RIGHT mouse button and select "Easy Alerts" option
- then define alerts you want to generate using real time streaming quotes).
If you add any alerts, please note that symbols used in alerts add up to total number of streaming symbols, so if you have 50 symbol limit on your data source and have 40 symbols in your real time quote window you will be able to setup alerts for only 10 extra symbols (if you use the same symbols as in real time quote window then it does not add up to the total count)
OLE: added ability to control sorting in AA window from OLE level
Object:
Analysis

New method:
SortByColumn( iColumn, bAscending, bMultiMode )

where iColumn - is zero-based column index to sort bybAscending - true/false decides the order we wantbMulti - if set to false - it means that we want to sort by single column or we define starting column for multi-column sortif set to true - it means that we are defining additional columns for multiple-column sort.So to sort by many columns you need to call SortByColumn once with bMulti set to false and then call SortByColumn for all remaining sort columns with bMulti set to true.

Example (multiple column sort by column 1 and 2):
AB = new ActiveXObject("Broker.Application");AA = AB.Analysis; // sort by date/time column AA.SortByColumn( 1, False, False ); // add secondary sort column (see last argument = True) AA.SortByColumn( 2, False, True );
OLE: added Application.Visible property

AB = new ActiveXObject("Broker.Application"); AB.Visible = True; WScript.Sleep(1000); AB.Visible = False; WScript.Sleep(1000); AB.Visible = True; WScript.Sleep(1000); AB.Quit();
OLE: when AmiBroker is created from OLE, it loads default layout now (previous versions did not
Scaling in/out fixes: added extra checks not to exceed available cash (scaling-in) and not to drop below zero shares (scaling out)
Time&sales now allows the user to disable display of bid/ask and/or trades
By default both trades and bidl/ask quotes are shown, but now you can decide to turn off either one or both by clicking with RIGHT mouse button over Time&Sales window and checking/unchecking "Show Trades" and "Show Bid / Ask Quotes"
menu items.
Tools: Preferences: Misc, renamed "Save on exit" to "Auto-save" and changed auto-save logic, so layouts are saved on each change

When Auto-save: Layouts is turned ON, currently loaded layout is saved on change (i.e. when another layout is loaded, previously selected layout changes are saved first), the same with database load - if you load different database then recently used layout is stored automatically. IMPORTANT: changes are saved now to most recently loaded layout (not to 'default' one as it was before). So default layout is NOT affected by auto-save if you manually loaded different layout.

CHANGES FOR VERSION 4.78.1 (as compared to 4.78.0)

atcFlagEnableInPortfolio now works fine with atcFlagCompositeGroup flag.
Previously using atcFlagCompositeGroup (or atcFlagDefaults) prevented creation of composite in custom backtest procedure (even if atcFlagEnableInPortfolio was specified). atcFlagEnableInPorfolio worked only without it. Now it is fixed (works fine with or without atcFlagCompositeGroup)
AFLEditor: Edit->Replace fixed
HTMLExport: fixed crash occuring sometimes when lots of columns were used
HTMLExport: fix: colorDefault is not BLACK for background (bgcolor in <TD> tag is skipped) [(this also reduces file size)
HTMLExport: header row is in separate line (CR at the end)
backward compatiblity fix for ExportImage() function (when width and height are not provided then default - current window size - is used)
(NOTE: this also fixes Edit->Image->Export )

CHANGES FOR VERSION 4.78.0 (as compared to 4.77.0)

AA: HTML export added that supports FULL COLOR output
To export to HTML just click "EXPORT" button in AA window and select "HTML files" from "Files of type" combo box in file dialog.

You can also use OLE interface Export method - if EXTENSION provided in the file name is .html then AmiBroker will output HTML file,
otherwise it will output CSV (text) file. If you want colorful output in Excel, just EXPORT the file to HTML and load it into Excel (or drag-drop to excel).

Please note that Excel color palette is limited (not all 16 million colors available in AmiBroker can be represented in Excel) Example colorful test exploration:

Filter=1; for( i = 0; i < 256; i = i + 16 ) AddColumn( C, "C"+i, 1.2, colorDefault, ColorHSB( ( BarIndex() + i ) % 256, 255-i, 255 ) );
List control code reviewed for better 64bit compatibility
List selection is maintained after sorting
Multiple column sort implemented in AA result list (and other list controls as well)

To sort by more than one column:
a) click the FIRST column then
b) SHIFT-click second, third, fourth column ... and so on (upto 40 columns can be sorted at once)
(to SHIFT-click means to click with left mouse button while having SHIFT key pressed down)
c) to change the Asc/Desc order click on the same column again

To restart sorting, release SHIFT key and click on column (it will become first).

Subsequent columns (in the order you have clicked on them) are marked with 1, 2, 3, 4, 5, 6, 7, 8, 9 numbers
(if you select more than 10 columns, then all columns above 10th will be marked with '...')
Backtester: added EarlyExitBars/EarlyExitFee functionality (not supported by old (v.4.4) backtester)

Early exit (redemption) fee is charged when trade is exited during first N bars since entry.
The fee is added to exit commission and you will see it in the commissions reported for example in detailed log. It is also reflected in the portfolio equity (so for first N bars since entry portfolio equity is lower by early exit fee).

// these two new options can be set on per-symbol basis // how many bars (trading days) // an early exit (redemption) fee is applied SetOption("EarlyExitBars", 128 ); // early redemption fee (in percent) SetOption("EarlyExitFee", 2 );

(note 180 calendar days is 128 or 129 trading days)

// how to set it up on per-symbol basis? // it is simple - use 'if' statement if( Name() == "SYMBOL1" ) { SetOption("EarlyExitBars", 128 ); SetOption("EarlyExitFee", 2 ); } if( Name() == "SYMBOL2" ) { SetOption("EarlyExitBars", 25 ); SetOption("EarlyExitFee", 1 ); }
AA: "Scan every" feature has been renamed to "Run every" and allows automatic repeat of scan or exploration (new feaeture) it allows also shorter intervals

Run every intervals can now be defined in MINUTES (default) or SECONDS.
To enter run-every interval in seconds simply add "s" or "sec" at the end of interval value, for example:

10 sec - for run every 10 seconds
5 s - for run every 5 seconds
13 min - for run every 13 minutes
35 m - for run every 35 minutes
7 - for run every 7 minutes (if time unit is not specified then by default minutes are used)
OLE: ExportImage() now supports Width and Height parameters

ExportImage function that now allows to specify width and height.
So to export say 640x480 gif image you need to write:

AB = new ActiveXObject("Broker.Application");
Win = AB.ActiveWindow;
Win.ExportImage( "test.gif", 640, 480 );

and you will get perfect image with no jagginess or any scaling artifacts.
And it works independently of your current window size and it does NOT affect
your current window size.
fix: customColor1 can be selected again using color picker

CHANGES FOR VERSION 4.77.0 (as compared to 4.76.0)

styleDashed now uses correct background color when it is modified using SetChartBkColor
AFL Editor: when there is nothing more to undo/redo beep sound is produced
AFL: OBV() and AccDist() now work correctly with TimeFrameSet (#26768)
AFL Editor: Edit->Replace implemented (Ctrl+H shortcut)
CBT: AddCustomMetric now has new parameter that controls number of decimal places used to display custom metric

Trade.AddCustomMetric( "Name", value, [optional] decplaces = 2 );

Backtester.AddCustomMetric( "Name", Value, [optional] LongOnlyValue = Null, [optional] ShortOnlyValue = Null, [optional] decplaces = 2 );

where
decplaces defines how many decimal places are used to display given metric in the report.If not specified it defaults to 2 decimal places.

Example code:

bo.AddCustomMetric( "Somestat", 100*kr, Null, Null, 4 ); // 5th parameter controls number of decimal places
Tooltip "value" field now uses Prefs setting (Tools->Preferences->Misc: "Decimal places in chart titles/tools") + 1 digit decimal points
All Fibonbacci tools now use user-defined number of decimal places (Tools->Preferences->Misc: "Decimal places in chart titles/tools").

Note that this setting applies to NEWLY drawn or MODIFIED fibonacci retracements. Already existing ones won't be affected until you modify/move them.
Added new submenu under "Symbol": "Real Time Quote" with 3 new options: Add selected symbol / Add watch list / Remove all symbols
IMPORTANT NOTE: to see new menu you need to go to Tools->Customize, select "MENU" bar and press "RESET" button
AFL: PlotText("Text", x, y, color, bkcolor = colorDefault )

New AFL function:

PlotText( "text", x, y, color, bkcolor = colorDefault )

Writes text in specified co-ordinates

where
x - is x-coordinate in bars (like in LineArray)
y - is y-coordinate in dollars

color is text color
bkcolor is background color

If bkcolor is NOT specified (or equal to colorDefault) text is written with TRANSPARENT background
any other value causes solid background with specified background color

Example:

Plot(C,"Price", colorBlack, styleLine ); Plot(MA(C,20),"MA20", colorRed ); Buy=Cross( C, MA(C,20 ) ); Sell= Cross( MA( C, 20 ), C ); dist = 1.5*ATR(10); for( i = 0; i < BarCount; i++ ) { if( Buy[i] ) PlotText( "Buy\n@" + C[ i ], i, L[ i ]-dist[i], colorGreen ); if( Sell[i] ) PlotText( "Sell\n@" + C[ i ], i, H[ i ]+dist[i], colorRed, colorYellow ); } PlotShapes( Buy * shapeUpArrow + Sell * shapeDownArrow, IIf( Buy, colorGreen, colorRed ) );
AFL: VarGetText
New function

VarGetText( "varname" )

the same as VarGet but always returns always string values
(if underlying variable has different type it is converted to string)

Allows for example appending to text variable no matter if it is defined earlier or not:

Title = VarGetText("Title") + "something"; // this will work correctly regardless of whenever title was defined earlier or not]
VarSetText
New function

VarSetText( "varname", "value" )

the same as VarSet but operates on string values.
Auto-analysis backtest result summary modified (added row count and removed wordwrap)
Enlarged "Additional commands" field in ASCII Import Wizard
CBT: Fixed "Out of range" message generated by OLE wrappers when GetValue method of CBT Metrics object returned infinite value (for example as result of division by zero)
Fixed handling of CLICK - DRAW - CLICK drawing mode (#26994) during RT refresh
Fixed incorrect candle color occuring sometimes when candle body was only 1-pixel high
Fixed potential crash occuring sometimes when RTQ window was never shown but RT update arrived
Fixed problem with double arrows appearing on chart with ID == 1
Fixed problem with selected date in Print/PrintPreview/Image copy
RTQ context menu "Delete symbol" renamed to "Remove symbol"
UI: simplification, Removed (default) from File->Database Settings Base Time interval Combo and "(default)" from local data storage and removed "IMPORTANT ..." static

CHANGES FOR VERSION 4.76.0 (as compared to 4.75.2)

Renamed "Number of bars to load" to just "Number of bars"
Fixed problem with weird Time&sales background colors (bug introduced in 4.75.x)
Fixed 1.#INF in P/E colum (RT quote window)
Editor: fixed actionBacktest / actionExplore mix in auto-complete dropdown
Chart Y-axis can now be displayed as fractions (1/4, 1/8, 1/16, 1/32, 1/64, 1/128) - to switch this use Parameters -> GRID -> FORMAT
CBT: Trade object has now "Handle" property that can be passed to ExitTrade and ScaleTrade methods instead of symbol to allow control over exiting/scaling multiple positions of the same symbol

// This is sample formula that allows // to open multiple, separate positions on the same symbol // without averaging effect (i.e. each position on the same // symbol is completely independent). // // Sample code is provided for trading one symbol // Enter symbol you want to trade below Symbol = "MSFT"; Buy=Sell=Short=Cover=0; // real rules are defined inside custom backtest proc SetCustomBacktestProc(""); // enable custom backtest if( Status("action") == actionPortfolio ) { // actual backtest routine // (low-level) bo = GetBacktesterObject(); SetForeign( Symbol ); // make sure to calculate actual buy and buyprice arrays for symbol we need to backtest Buy = 1; // For testing purposes just enter new position every bar BuyPrice = Open; RestorePriceArrays(); // actual backtest loop bo.PreProcess(); for( i = 1; i < BarCount; i++ ) { // first update backtest stats and handle stops bo.UpdateStats( i, 0 ); bo.HandleStops( i ); bo.RawTextOutput("Bar " + i ); if( Buy[ i - 1 ] ) // if buy signal in previous bar { bo.EnterTrade( i, Symbol, True, BuyPrice[ i ], 500 /* $5000 into one trade */); } for( OpenPos = bo.GetFirstOpenPos(); OpenPos; OpenPos = bo.GetNextOpenPos() ) { // exit positions if their age is > 5 bars and they are profitable if( OpenPos.BarsInTrade > 5 AND OpenPos.GetProfit() > 0 ) { // HERE IS A NEW PART !!! // WE ARE PASSING HANDLE instead of ticker symbol // THIS ENSURES PROPER OPERATION even if we have multiple positions of the same // stock bo.ExitTrade( i, OpenPos.Handle, OpenPos.GetPrice( i, "O" ) ); } } bo.RawTextOutput("Number of open positions: " + bo.GetOpenPosQty() ); bo.UpdateStats( i, 2 ); } bo.PostProcess(); }
CBT: Small fix for low-level CBT backtest - internal current bar counter is set now via UpdateStats
ASCII import wizard: Additional commands field accepts "ENTER" key alone (previously one needed CTRL+ENTER to create new line)
ASCII importer limits the volume to 2147483647 so after convertion to 32bit integer it never becomes negative
Added parameter list to backtest report (Settings page)

CHANGES FOR VERSION 4.75.2 (as compared to 4.75.1)

when no data we available chart background is correct now (it was black instead of one choosen in prefs in 4.75.x)
Added ability to disable fixed ruin stop
When you add

SetOption("DisableRuinStop", True);

to your formula the backtester will not use built in 99.96% loss stop (ruin) Note: it is recommended NOT to use it unless you really have to.
added new option to SetOption:

SetOption("EveryBarNullCheck", True)

SetOption("EveryBarNullCheck", True)- allows to turn on checking for Nulls in arithmetic operations on every bar in the array(by default it is OFF - i.e. AmiBroker checks for nulls that appear in the beginning of the arrayand in the end of the array and once non-null value is detected it assumes no further holes (nulls) in the middle). Turning "EveryBarNullCheck" to True allows to extend these checks to each and every barwhich is the way 4.74.x and earlier versions worked.

Note however that turning it on gives huge performance penalty (arithmetic operations are performed even 4x slower when this option is ON, so don't use it unless you really have to).
Added small result summary after backtest in the status line
Fixed problem with plotting xshifted charts occuring when formula referenced future bars
logical (boolean) operators check for nulls on every bar and treat null as "false" to maintain backward compatibility with formulas written for previous versions
Modified file dialog buffer size from 262144 (0x40000) bytes to 262143 (0x3FFFF) to workaround 16 bit (64KB) buffer limit of Windows 95/98/NT4 (yes surprisingly NT4 is limited to 64K buffer in file dialogs)

16-bit windows (95/98) and NT4 were treating 0x40000 as 0 (zero) because only lower 16 bits were interpreted. Thanks to move to 0x3FFFF it is now interpreted as 0xFFFF on 16 bit windows.
Potential crash fixed when formula using AddToComposite atcEnableInBacktest is verified in the AFL editor
Added XShift parameter to PlotOHLC and PlotForeign functions
fixed re-mapping of built-in and custom colors in grid color picker

CHANGES FOR VERSION 4.75.1 (as compared to 4.75.0)

ParamColor now accepts 24 bit colors without crashing
Null values appearing at the end of data series (array) are handled appropriately (propagate through arithmetic operators)
This fixes problem that 4.75.0 had with "trendline" formulas that used Null values put into the array at the end of the data series.
Most recently picked drawing tool color is preserved between runs
EncodeColor was not handling all 24 bit color combinations correctly. Fixed now.
Chart tree fix: Moving or renaming formula in charts tree now updates all paths in indicators that use this formula

CHANGES FOR VERSION 4.75.0 (as compared to 4.74.6)

New chart style (styleCloud) to be used to create "cloud" chart as in Ichimoku charts. Also useful for indicator charts like MACD.

This style fills non-rectangular (free shaped) area between HIGH and LOW arrays provided
by PlotOHLC function. Open and Close arrays are not relevant for plotting however Close
is used as usual to display value label and title. So recommended use is to use "upper" bounding value
in Open and High arrays and "lower" bounding value in "Low" and "Close" arrays
Sample Ichimoku cloud:

SL = ( HHV( H, 26 ) + LLV( L, 26) )/2; TL = ( HHV( H, 9 ) + LLV( L, 9 ) )/2; DL = Ref( C, 25 ); Span1 = Ref( ( SL + TL )/2, -25 ); Span2 = Ref( (HHV( H, 52) + LLV(L, 52))/2, -25); Plot( C, "Price", colorBlack, styleCandle ); Plot( SL, "SL", colorRed, styleThick ); Plot( TL, "TL", colorGreen, styleThick ); PlotOHLC( 0, span1, span2, span2, "Cloud", colorLightOrange, styleCloud );

Simple MACD cloud:

m = MACD(); Plot( Signal(), "Signal", colorBlue, styleThick ); PlotOHLC( m,m,0,m, "MACD", IIf( m > 0, colorGreen, colorRed ), styleCloud );

Another MACD cloud (difference):

m = MACD(); s = Signal(); Plot( s, "Signal", colorBlue); Plot( m, "MACD", colorRed ); PlotOHLC( m,m,s,m, "MACD", IIf( m > s, colorLime, colorLightOrange), styleCloud );
when File->Open database or MRU list is choosen then old database is saved first
When default database is deleted, AB now asks for new default database folder, instead of re-creating it
when database is deleted from the outside and user picks it via MRU list -then gets removed from MRU list and is not recreated anymore
When AmiBroker is launched with incorrect "Start in" (working directory) then it automatically switches to "last good" path

" Last good" path is saved in the registry HKEY_CURRENT_USER\TJP\Broker\Defaults\LastGoodPath, during successful launch in correct directory (whenever working directory is correct or not it is determined by checking for presence of Broker.chm file (help file))

Using correct working directory is important because AmiBroker uses relative paths to most components.
AFL: new function: StaticVarRemove()

StaticVarRemove("varname")
removes static variable and releases associated memory
Start-up time decreased significantly by implementation of on-demand loading of formulas

(on slow, low-end machines loading time decreases from 10 seconds to just 0.5 second)
printf/StrFormat/SelectedValue functions no longer affect number of extra future bars calculated by QuickAFL
Minor plugin status change (as in IB backfill) does not cause sound (only tooltip is displayed)
Increased the limit of files that can be selected using Windows file dialog
Now import wizard and ascii importer file dialogs use 256KB buffer for file names that on average should allow 20000 files to be selected at once.
Further speed improvements by rewriting chart ID lookup routine (GetChartInfoByID)
Chart title string is clipped so Y axis is never obscured
Chart title can be automatically wrapped now
Use 'Parameters' window,
" Axes & Grid" tab,
Miscellaneous->Wrap title: YES

If you want to set it programmatically from the formula use
SetChartOptions( 2, chartWrapTitle );
Auto-hide panes slide slightly faster
All basic array arithmetic and logical operators inlined and hand optimized on assembly level for speed, gives upto 450% speed increase in basic array calculations

Example speed increases:

a) purely "theoretical" example
million iterations of array addition
for( i = 0; i < 1000; i++ ) for( k = 0; k < 1000; k++ ) Sumh = H + L;

runs 4.8 times (+480%) faster (5 seconds in 4.75 compared to 24 seconds in 4.74 and older, Athlon64@2GHz)
2000 data bars.

This gives ( 2000 * 1000000 additions ) / 5 sec = 400 MEGAFLOPS (millions of floating point operations per second) AFL array-based AFL execution speed.

b) "real-world" examples:
" Projection Oscillator"
http://www.amibroker.com/library/detail.php?id=344
single security optimization runs 85% faster
(13 seconds (4.75) compared to 24 seconds (4.74 or older) )

" RSIS"
http://www.amibroker.com/library/detail.php?id=153
single-security optimization 5000 iterations runs 21% faster
(28 seconds (4.75) compared to 34 seconds (4.74 or older))

NOTE: Performance increase depends on complexity of the formula. Biggest gains can be observed for formula doing LOTS of mathematical calculations on arrays (using lots of +, -, *, /, ^, %, comparisions <, >, ==, !=, <=, >=, etc).
AFL: new function: SetChartBkColor( color )
sets chart background to user-specified color
Added View->Time & Sales menu back
Added chart timing display (you can turn it on via Tools->Preferences->Display chart timing)

when turned on, in the bottom of each chart the following information is displayed:
Total time X sec, AFL exec time Y sec (Z %), # extra bars back Q, fwd R

where
X - is total time in second spent during chart refresh ( this includes AFL execution and actual screen painting/drawing, grid / scale calculations, etc)
Y - is time spent in chart AFL execution only (without any actual screen painting, grid / scale calcs)
Z - is percentage of time that AFL execution takes compared to total time required for refresh
Q - is a number of previous bars (before first visible bar) that are needed to calculate the indicator (QuickAFL estimation)
R - is the number of future bars (after last visible bar) that are needed to calculate the indicator (QuickAFL estimation)
Added asin/acos to the AFL function reference
AFL: 24-bit (16 million) truecolor support for indicators and exploration output.
new ColorRGB() and ColorHSB functions to access full 24 bit palette

ColorRGB( red, green, blue )

returns color value to be used in Plot/PlotOHLC/AddColumn/AddTextColumn
red, green, blue - represent color component values in range 0..255 each

For more information about RGB color model please read:
http://en.wikipedia.org/wiki/RGB_color_model

ColorHSB( hue, saturation, brightness )

returns color value to be used in Plot/PlotOHLC/AddColumn/AddTextColumn

hue - represents gradation of color within the optical spectrum (as in rainbow)
saturation represents "vibrancy" of the color
brightness represents brightness.

Each parameter ranges from 0 to 255, where 0 represents 0% saturation/brightness
or 0 degree hue in HSV color wheel,
and 255 represents 100% saturation/brightness or 360degrees hue in HSV color wheel

When you modify hue from 0 to 255 you will see consecutive
rainbow colors starting from red, through yellow and green to blue and violet.

For more information about HSB color space please read:
http://en.wikipedia.org/wiki/HSB_color_space

Example MA rainbow chart (bring up parameters dialog and play with it):

side = 1; increment = Param("Increment",2, 1, 10, 1 ); for( i = 10; i < 80; i = i + increment ) { up = MA( C, i ); down = MA( C, i + increment ); if( ParamToggle("3D effect?", "No|Yes" ) ) side = IIf(up<=down AND Ref( up<=down, 1 ), 1, 0.6 ); PlotOHLC( up,up,down,down, "MA"+i, ColorHSB( 3*(i - 10), Param("Saturation", 128, 0, 255 ), side * Param("Brightness", 255, 0, 255 ) ), styleCloud | styleNoLabel ); }

///////
Color-parade exploration

Filter=1; for( i = 0; i < 256; i = i + 16 ) AddColumn( C, "C", 1.2, colorDefault, ColorHSB( ( BarIndex() + i ) % 256, 255-i, 255 ) );

CHANGES FOR VERSION 4.74.6 (as compared to 4.74.5)

Fixed problem with RTQuote failing to load symbol list during first show
Fixed problem in AA-Apply To-Date that was introduced because of tab order change

CHANGES FOR VERSION 4.74.5 (as compared to 4.74.4)

Toolbar theme was reset when entering Formula Editor, now it is fixed
Quote Editor list now remembers columns size and order between runs
Keyboard shortcut editor now allows using punctation characters like Ctrl+[, Ctrl+], - =, etc
Automatic Analysis: Pick button now has shortcut on Alt+I to avoid conflict with Alt+P (Parameters), also fixed tab order
Fixed ParamDate to return DateNum instead of YYYYMMDD (4 digit year)

CHANGES FOR VERSION 4.74.4 (as compared to 4.74.3)

New "Appearance" tab in Tools->Customize, allowing to select menu/toolbar/docking pane themes and tab location
Layout and Symbol trees are marked for refresh when database is changed and refreshed when user brings them up
Fixed exception that occurred after customization when ticker bar was removed from all toolbars
Fixed ticker bar losing focus when Shift/Insert/CapsLock/NumLock pressed
Real-time Quote column order/size is remembered correctly again

CHANGES FOR VERSION 4.74.3 (as compared to 4.74.2)

Fixed losing focus by ticker combobox when Shift, CapsLock, NumLock, Insert keys were pressed

CHANGES FOR VERSION 4.74.2 (as compared to 4.74.1)

Ticker combo is now correctly refreshed on database change even if moved to other toolbar than default
Previously when Reset was used on Ticker toolbar it became blank - now it is fixed, ticker combo is refilled after closing customization mode
Edit field in Ticker combobox does not scroll horizontally now when edited text is too long
Numeric keypad keys now work with File MRU menu (most recently used files)
Global shortcuts continue to work when focus is inside ticker combo
"Profile" button in View toolbar works correctly now

CHANGES FOR VERSION 4.74.1 (as compared to 4.74.0)

Fixed incorrect message displayed in the progress window during some longer explorations

CHANGES FOR VERSION 4.74.0 (as compared to 4.73.0)

New user interface: fully user-customizable advanced docking panes/toolbars/menus.

New UI features:
- Tear-Off Tabs
- Nested docking pane grouping
- WYSIWYG docking
- sliding auto-hide pinnable windows
- modern "Whidbey" look
- Tear-Off menus and toolbars
- Add/copy/Delete/Modify/drag-drop commands
- User-defined toolbars
For a little video presentation see: http://www.amibroker.com/video/uicustomize.htmlNote: toolbar and keyboard customizations made in old versions need to be re-done because they can not be imported by new system due to fundamental differences (I am sorry about that)]
GroupID(), IndustryID(), SectorID, MarketID(), InWatchList(), IsIndex() and IsContinuous() functions are now affected by SetForeign
Removed debug messages cluttering DebugView output (that appeared in 4.73)
Changed the way drawing color picker is working: now it works like in Word (or other text editor) - keeps selected color even if drawing with different color is clicke
Fixed false message "The note has been modified outside the notepad editor." occuring when file did not exist
OLE: Changed Window.LoadTemplate to return FALSE when file can not be found
OLE: Window.LoadTemplate now refreshes display so it is not necessary to use SelectedTab = 0
Removed constant RT refreshes in interpretation window when text does not change
ZoomToRange: last selected bar in range is visible after zooming now

CHANGES FOR VERSION 4.73.0 (as compared to 4.72.1)

OLE: Window object, new method ZoomToRange( From, To )
ZoomToRange( From, To )
From and To parameters are of any type that can be converted to date(you can use string or OLE date for example).

Example code (JScript):

AB=new ActiveXObject("Broker.Application");
AW = AB.ActiveWindow;
if( AW.ZoomToRange( "2005-04-01", "2005-08-01" ) )
{
WScript.Echo("Zoom successfull" );
}
Fixed: Chart got shrinked a bit with each overlaid plot, now the Y scale does not change (unless really needed)
Fixed: XShift now works correctly with styleOwnScale and styleLeftScale
Fixed: Volume chart overlaid on price chart in log scale (overlay) was compressed to flat line, now it is fixed (volume chart overlay uses linear scale always)
[#22262]
AFL: Added AlmostEqual function (completed: 2005-09-16)

AlmostEqual( x, y, ulps = 5 )

this is a helper function for comparing floating point numbers.It returns True if x and y are equal or almost equal upto defined accurracy (ulps).It is recommended to use this function instead of equality check (==) as itleads to more reliable comparisons and less headache caused by IEEE floating pointacurracy issues.

Parameters:x, y - the numbers or arrays to be compared,Ulps stands for "units in last place" and represents maximum relative error of the comparison. Since 32 bit IEEE floating point numbers have accurracy of 7 significant digits, 1 unit in last place(ulp) represents relative error of 0.00001 %. The default value of ulps parameter is 5 which gives roughtly 0.00005% "comparison sensitivity".

Example code:

if( 1/3 == 0.3333333 )
{
printf("32-bit Floating point IEEE exact equality\n");
}

if( AlmostEqual( 1/3, 0.3333333 ) )
{
printf("Numbers are almost equal\n");
}

Thanks to Bruce Dawson for his fast routine.
Optimize() function now checks if min < max, step > 0 and checks if parameter name is not empty
Made Time&Sales case insensitive (when "case sensitive tickers" option is turned off")
OBV/AccDist/Chaikin functions adjusted to be SetForeign-aware
OLE: Application object new methods
BOOL LoadLayout( filename )
BOOL SaveLayout( filename )

AB = new ActiveXObject("Broker.Application");
AB.LoadLayout("C:\\Program Files\\AmiBroker\\Data\\Layouts\\Default.awl");
OLE: Window object new property: SelectedTab

AB = new ActiveXObject("Broker.Application");
AW = AB.ActiveWindow;
tabindex = AW.SelectedTab; // read selected tab
AW.SelectedTab = 3; //switch to tab 3
AW.SelectedTab = tabindex; // restore originally selected tab
Fixed: Exception was generated when GetRTDataForeign was called with non-existing ticker
OLE: Window object new methods: LoadTemplate, SaveTemplate

AB = new ActiveXObject("Broker.Application");
AW = AB.ActiveWindow;
AW.SaveTemplate("Test.abt");
AW.LoadTemplate("Test.abt");

CHANGES FOR VERSION 4.72.1 (as compared to 4.72.0)

fixed out-of-memory problem sometimes occuring during scan of large (>512MB) databases

CHANGES FOR VERSION 4.72.0 (as compared to 4.71.1)

" Currency" field support in ASCII importer
added command:
$CURRENCY USD

and field:

$FORMAT Name,Currency$OVERWRITE 1$AUTOADD 1]
Added "Additional commands" field in the Import wizard for typing any extra $- commands that are not available via checkboxes
Added parameter to AddColumn/AddTextColumn to control column width

AddColumn( ARRAY, "Caption", format = 1.2, color = colorDefault, bgcolor = colorDefault, width = -1);
AddTextColumn( "Text", "Caption", format = 1.2, color = colorDefault, bgcolor = colorDefault, width = -1 );
AddToComposte new flag to work when Status("action")== actionPortfolio (completed: 2005-09-09)
new flag is called atcEnableInPortfolio

Example:

if( Status("action" ) == actionPortfolio )

{
... Custom backtest mode here ....
AddToComposite( some_array, "~COMPOSITE", "X", atcFlagEnableInPortfolio | atcFlagDefaults );

}
AFL added: tanh(), sinh(), cosh() functions
Hyperbolic tangent, sine and cosine function
AFL functions: StrToUpper and StrToLower
Fixed: Tick ASCII import: last tick of previous import was deleted on subsequent import, now it is corrected
Function to detect mouse button state

GetCursorMouseButtons() returns mouse button state at the time when chart formula is executed

0 - if no mouse button is pressed
1 - if left mouse button is pressed
2 - if right mouse button is pressed
4 - if middle mouse button is pressed

plus combinations:3 - left + right5 - left + middle6 - right + middle 7 - left + right + middle]
GetRTDataForeign (retrieving values for other symbols)
GetRTDataForeign( "field", "symbol")
Pane is not deleted if shrinked down to zero (prevents from accidential deletion of panes)
Plot function now has xshift parameter that allows to visually shift the chart past the last bar
Example 20-bar Moving average shifted 10 bars into the future past the last bar:

Plot(Close,"Close",colorBlack,styleCandle);Plot(MA(Close,20), "Shifted MA", colorRed, styleLine, Null, Null, 10 );

Note that shift occurs during plotting and does not affect source array
Removed data source selection from preferences because it caused user confusion way too often
Stock.Currency available via OLE
Title variable now supports new special token {{OHLCX}} which is replaced at runtime by string "Open ..., Hi .... Lo ... Close (...%)" showing current price

This way it is possible to implement formula that will show OHLC prices with number of decimal places set in the preferences.

Example:

SetChartOptions(0,chartShowArrows|chartShowDates);
_N(Title = "{{NAME}} - {{INTERVAL}} {{DATE}} {{OHLCX}} {{VALUES}}" );
Plot( C, "Close", ParamColor("Color", colorBlack ), styleNoTitle | ParamStyle("Style") | GetPriceStyle() );
user-definable number of decimal places in chart titles (completed: 2005-09-09)
Number of decimal places displayed in default chart title is now user-definable inTools->Preferences->Miscellaneous"Decimal places in chart titles".

Allowable values:
-1 - dynamic mode (number of decimal places automatically adjusted)
0..6 - fixed number of decimal places
QuoteArray resizing now uses heuristic algorithm to minimize memory fragmentation and increase performance
atcFlagDeleteValues now highlighted properly in the AFL editor

CHANGES FOR VERSION 4.71.1 (as compared to 4.71.0)

fixed compatibility problem with AmiQuote (due to changed order of OLE properties/method while AmiQuote was using old ones)
now ASCII importer in $TICKMODE does not delete quotes older than oldest (first) record in the imported file, so you can safely import tick data from subsequent files (older first, newest later)

CHANGES FOR VERSION 4.71.0 (as compared to 4.70.5)

AFL: added GetCursorXPosition() and GetCursorYPosition() functions

Functions return current mouse cursor position.
Values returned are equal to those visible in the status bar, and these functions require status bar to be visible. Returned values represent cursor position at the formula execution time (or few milliseconds before it) and accurracy is subject to pixel resolution of the screen (first cursor position is read in screen pixels (integer) and then converted to actual value therefore for example when screen resolution is 1024x768 maximum obtainable resolution in X direction is 0.1% and in Y direction 0.13%), also X values are snap to datetime of nearest data bar.

It only makes sense to use these functions in indicator/interpretation code.

Using them in AA window may yield random values.GetCursorXPosition() function returns X position in DateTime format (the same as used by DateTime() function).You can convert it to string using DateTimeToStr() function.GetCursorYPosition() returns Y position (as displayed in Y axis of the chart).

Example:

ToolTip="X="+DateTimeToStr(GetCursorXPosition()) +"\nY="+GetCursorYPosition();
AFL: added DateTimeToStr() and StrToDateTime() functions

These functions allow to convert string to datetime format and vice versa.

Example:

ToolTip="X="+DateTimeToStr(GetCursorXPosition()) +"\nY="+GetCursorYPosition();]
Added ability to store charts as .GIF (in addition to PNG)
ASCII importer maximum supported line length is increased to 2048 characters
Fixed: .aflsafe files didn't get deleted automatically
Added N-volume bars charts and timeframe support.

Custom N-volume bar intervals are definable (as usual) in Tools->Preferences->Intraday.

TimeFrame functions were also extended to support N-volume bars using new TimeFrameMode() function calling

TimeFrameMode( 0 );

- switches time frame functions to time-based operation (the default)

TimeFrameMode( 1 );

- switches time frame functions to N-tick operation (positive values passed to TimeFrameSet are treated now as N-tick)

TimeFrameMode( 2 );

- switches time frame functions to N-volume bar operation (positive values passed to TimeFrameSet are treated nowas N-volme bars)

Example:

TimeFrameMode( 2 );
TimeFrameSet( 50000 ); // 50'000 share bars..
...do something ...
TimeFrameRestore();

Note: N-volume bars are somewhat weird (compression of data to N-volume bar may actually deliver MORE output bars - for example if one tick is 1000 shares and you have specified 100V bars then single tick will be expanded to TEN 100V bars - ten times original size)
TimeFrame functions are protected against array overrun and will not decompress beyond original array size (you will get an "Error 47. N-volume bar compressed data longer than base time frame").
Also switching main time frame to some weird N-volume bar value will result in limiting the output to maximum twice original data size(without error message).
You should keep that in mind and avoid using too small N-volume bar intervals that could lead to such condition.
Also due to the nature of N-volume bars the only TimeFrameSet() function will yield correct N-volume bar values, TimeFrameGetPrice() may give slightly distorted results.
It is also possible to use n-volume bars in TimeFrame functions without calling TimeFrameMode() - it is then necessary to specify n-volume bars as negative number offset by -1000000 (minus one million):

TimeFrameSet( -1000000 - 2000 );

// gives 2000V barsSimilarly formatted negative numbers will be reported by Interval() function when n-volume bars are selected.
OLE: Save As PNG / GIF callable from automation

Example script:

AB = new ActiveXObject("Broker.Application");
AB.ActiveWindow.ExportImage("Test.png");
Plugin is not called when GetExtraData is used for symbol that has "use only local database" flag turned on, and NULL is returned instead of an error
Protected against changing application's current working directory by printing to file
Toolbar does not get wrapped when main frame window is resized
OLE: Analysis object has new method MoveWindow( x, y, width, height) that allows to control position and size of automatic analysis window

AB = new ActiveXObject("Broker.Application");
AB.Analysis.MoveWindow( 10, 10, 200, 200 );

It has some restrictions on size: specified size can not besmaller than 10x10 pixels and can not be bigger than entire screen dimensions.
Also when "No minimum size for resizing dialogs" box in UNCHECKED in Tools->Prefs->Misc it won't shink AA window below default size necessary to fully display all controls.
ASCII importer: added ability to import tick data from text files

ASCII importer now allows tick data files to be imported.

Tick data files consist of several records having the same timestamp.This makes it impossible to use normal import mode which assumes different (unique) timestampsfor each data row (when same timestamp is found then new data overwrites old).

To turn on TICK mode you need to add manually

$TICKMODE 1

line to ASCII importer definition file.

$TICKMODE is a special mode of importer that allows to import quotes that haveduplicate time stamps.

It makes two assumptions:
a) input data should come in the ascending time order (i.e. OLDER records first, LATEST records last)
b) input data should consist of entire tick history because importer will DELETE any existing quotes (to avoid creating multiple copies of the same ticks).

Once again: Turning on
$TICKMODE 1
will DELETE ANY QUOTES that already exist in the database and then will import all ticks from input data file.
You have been warned.

For example data files like this:

MOL,0,20050606,162959,16400.0000,16400.0000,16400.0000,16400.0000,2MOL,0,20050606,162959,16400.0000,16400.0000,16400.0000,16400.0000,11MOL,0,20050606,162959,16400.0000,16400.0000,16400.0000,16400.0000,40

Can be imported using the following definition file:

$FORMAT Ticker, Skip, Date_YMD, Time, Open, High, Low, Close, Volume
$SKIPLINES 1
$SEPARATOR ,
$CONT 1
$GROUP 255
$AUTOADD 1
$DEBUG 1
$TICKMODE 1

Sometimes it happens that input files have invalid timestamps (seconds > 59).

For example:

MOL,0,20050606,162970,16400.0000,16400.0000,16400.0000,16400.0000,2

Please take a closer look at first line shown in this example it has time:16:29:70 (you see 70 seconds !)

So I had to add a special flag to the importer that works around such data errors.

It is called $ALLOW99SECONDS 1 and will convert all records with invalid seconds (i.e greater than 59)to 59s.
So record stamped 16:29:70 will be treated as 16:29:59

Now for tick mode to work with such incorrect records you would need to add two lines to ASCII importer definition:

$TICKMODE 1
$ALLOW99SECONDS 1

CHANGES FOR VERSION 4.70.5 (as compared to 4.70.4)

Fixed problem with Indicator Maintenance wizard not reading certain layouts correctly, thus deleting indicators that were in fact in use (allocated to: 4.70.5) (completed: 2005-05-08)
Custom backtester: EnterTrade method uses RoundLotSize parameter from the AA settings if none is specified in function call and RoundLotSize field in Symbol->Information is set to zero (allocated to: 4.70.5) (completed: 2005-05-04)
StaticVarSet - increased resolution to maximum supported by 32-bit IEEE (allocated to: 4.70.5) (completed: 2005-05-08)
When trade size limit expressed as % of bar volume shrinks down the trade below "MinPosValue" then such trade is not entered (allocated to: 4.70.5) (completed: 2005-05-04)

CHANGES FOR VERSION 4.70.4 (as compared to 4.70.3)

Closing editor window while AA operation is running does not result in crash if formula generates error (allocated to: 4.70.4) (completed: 2005-05-01)
When margin requirement was set to 100 (no margin) then very small artifacts (0.0000000000001) were displayed as margin loan, this is now corrected (allocated to: 4.70.4) (completed: 2005-05-01)
Added message "Formula execution halted because of an error - no chart to display" instead of "black pane" (allocated to: 4.70.4) (completed: 2005-04-30)
AFL Editor: Fixed problem with errorneous horizontal scrolling when editing lines longer than 256 characters (allocated to: 4.70.4) (completed: 2005-04-19)
Default layout is saved automatically when Tools->Indicator Wizard menu is selected (allocated to: 4.70.4) (completed: 2005-04-30)
Fixed styleThick and styleLine small 'dash' artifact (allocated to: 4.70.4) (completed: 2005-04-30)
Setup: Mixed mode EOD/Intraday is selected in demo eSignal database (allocated to: 4.70.4) (completed: 2005-04-30)
Time-compressed N-minute bars are no longer reset on USA EST 00:00:00 when align to session times is turned on (allocated to: 4.70.4) (completed: 2005-04-21)
Time-compression of bars: open interest is now correctly using "last" value (allocated to: 4.70.4) (completed: 2005-04-15)
Tools->Indicator Wizard keeps old built-in indicator slots untouched

CHANGES FOR VERSION 4.70.3 (as compared to 4.70.1)

Added "TIME" control to Text study properties (allocated to: 4.70.3) (completed: 2005-03-24)
Assigning hyper-long strings to Title variable does not cause program termination anymore (allocated to: 4.70.3) (completed: 2005-03-18)
Modified daily time compression and weekend filtering when daily bars are set to use day/night session start/end times (allocated to: 4.70.3) (completed: 2005-03-24)
[Now it works so that if day/night session is enabled then weekend begins with the start of Friday night session and ends with the beginning of Sunday night session]
"Filter weekends" option added to View->Intraday menu, so now it is not necessary to go to File->Database Settings->Intraday settings to change it (allocated to: 4.70.3) (completed: 2005-03-24)
"Override weekly/monthly bars use date of last trade" Preferences setting was affecting daily charts too. Now it is fixed (only weekly and monhtly charts are affected) (allocated to: 4.70.3) (completed: 2005-03-24)
Exception when using a left open Param window after the indicator has been closed (allocated to: 4.70.3) (status: fixed) (completed: 2005-03-21)
[now if Param window is closed if corresponding indicator pane is closed]
Fixed crash occuring sometimes when #included file was missing (allocated to: 4.70.3) (completed: 2005-03-21)
Fixed crash occuring when run-time or syntax error occurred in the #included file that was longer than 16000 characters (allocated to: 4.70.3) (completed: 2005-03-24)
Fixed GetCommission() method in Trade object not to ignore bInclExit parameter (allocated to: 4.70.3) (completed: 2005-03-24)
Control over tooltip text from AFL formula level (allocated to: 4.70.3) (completed: 2005-03-24)
[available now via new reserved variable called TooltipTooltip = "My Tooltip text shows Close " + Close;note that X/Y coords are displayed in the tooltip anyway and that custom tooltip text length is limited to 1000 characters.]
GetPositionValue() method of Trade object returned entry value instead of current value. Now it is fixed (i.e. CURRENT value is returned) (allocated to: 4.70.3) (completed: 2005-03-24)
Implemented "Min. pos value" in addition to "Min. shares" (allocated to: 4.70.3) (completed: 2005-03-24)
[This sets global minimum on position (trade) size. Backtester will not open trades below this limit. Default value is zero (no minimum trade size).The setting is available via: AA, Settings: Min. Pos. Value field, and via SetOption("MinPosValue", ... )]
Updated "READ ME" and some minor corrections in the User's Guide (allocated to: 4.70.3) (completed: 2005-03-24)
"Max. trade drawdown" for short trades was incorrect, now fixed (allocated to: 4.70.3) (completed: 2005-03-24)

CHANGES FOR VERSION 4.70.1 (as compared to 4.70.0)

Updated old parts of the User's Guide to present current status-quo.
First trade exit price was sometime reported as -1#QNAN, this should be fixed now (allocated to: 4.70.1) (completed: 2005-03-16)
"Delete indicator" in CONTEXT (chart) menu (allocated to: 4.70.1) (completed: 2005-03-10)
Add ownStyle scaling factor so it is not necessary to use Highest(V) in volume chart (allocated to: 4.70.1) (completed: 2005-03-15)
Added Help->AFL functions by name, Help->AFL functions by category, Help->AFL reference menu items to AFL editor (allocated to: 4.70.1) (completed: 2005-03-15)
added maskAll, maskDefault, maskPrice maskHistogram, chartShowDates, chartLogarithmic, chartShowArrows constants to syntax-colorizer def (allocated to: 4.70.1) (completed: 2005-03-12)
Adjusted formatting of param window min/max values so it does not use engineering notation (xEy) for numbers smaller than 1e8 (100 million) (allocated to: 4.70.1) (completed: 2005-03-12)
BUG: Applying preferences resets price style to candlesticks even if something different is selected in View->Price chart style (allocated to: 4.70.1) (status: fixed) (completed: 2005-03-15)
BUG: Choosing File->Print and then pressing "CANCEL" button blocked further RT refreshes, now fixed. Also now page count is set to 1 (avoid "Next page") (allocated to: 4.70.1) (status: fixed) (completed: 2005-03-15)
BUG: GetPriceStyle() included styleDots even if currently selected style was candlestick or bar (allocated to: 4.70.1) (status: fixed) (completed: 2005-03-15)
BUG: RT Quote, Context menu -> HIDE - does not shrink the panel (allocated to: 4.70.1) (status: fixed) (completed: 2005-03-15)
Change default include directory to "Formulas\Include" (allocated to: 4.70.1) (completed: 2005-03-15)
Display chart ID in Axes/Grid: Misc: part of parameters dialog and adjust description of Study() (allocated to: 4.70.1) (completed: 2005-03-12)
Make IDR_BROKERTYPE and IDR_MAINFRAME menus the same (allocated to: 4.70.1) (completed: 2005-03-15)
Modify registration checking to allow only licenses 4.20 and above (allocated to: 4.70.1) (completed: 2005-03-15)
New version of IB plugin: 1.3.6 - max. number of streaming symbols increased to 100 (allocated to: 4.70.1) (completed: 2005-03-02)
Pressing 'X' button in the main frame during Print preview closes print preview only instead of exiting application (allocated to: 4.70.1) (completed: 2005-03-15)
Quotes for symbols beginning with non-US characters are not saved (should "land" in '_' folder but they don't) (allocated to: 4.70.1) (completed: 2005-03-12)
Replaced IQFeed plugin with smaller (release) version (allocated to: 4.70.1) (completed: 2005-03-12)
Symbol->Categories, "This group uses own intraday settings" checkbox and button are now repositioned correctly when dialog is resized (allocated to: 4.70.1) (completed: 2005-03-12)

CHANGES FOR VERSION 4.70.0 (as compared to 4.69.8)

Rewriten all price formulas to use GetPriceStyle()
_DEFAULT_NAME() uses indicator title if there is no _SECTION defined
Changed default background color for the charts
Removed obsolete color pickers from preferences
when styleOwnScale is selected and min scale value is <= 0 then logarithmic scaling is turned off for this particular plot
data plugin interface adjusted back to allow NULL RecentInfo pointer even if ticker is not null
Removed all obsolete specialized drawing routines for old built-in charts
Syntax highlighting: default text and number color changed from pink to violet (easier for the eyes)
Hiding chart pane causes auto-arrange (if selected in preferences)
Chart panes with date axis displayed take more space than panes without axis if auto-arrange selected
fixed problem with handling scripting parts written in language that is new-line sensitive (VBScript)
Changed "cyclic" colors in ParamColor
fixed display of negative parameter values in Param dialog
Fixed "scale shrinking" effect when no plot is drawn
ParserCleanup is called when exception occurs inside interpretation
if no GraphXSpace variable is defined then default 2% extra space is added
support for TWS API 8.30 - add primaryExchange=Exchange = "SMART" (or "BEST")

CHANGES FOR VERSION 4.69.8 (as compared to 4.69.0)

Added copying error message in AFL editor (Edit->Copy Error Message)
New column in AA Trade List report: Scale In/Out - showing the number of scale-in and scale-out operations within given trade
Added protection against re-opening the same formula in multiple editor windows via "Edit Formula"
Price chart style switchable from the menu
- new AFL function:
  GetPriceStyle() returns price chart style value to be used in Plot statement
  Returned value depends on selection in View->Price chart style menu
- added View->Price chart style->Line with dots
IB plugin auto-refresh configurable via File->Database Settings->Configure, "Force instant quote retrieval for all symbols"
Fold/unfold directory in Chart tree causes inserting chart (fix double click handler)
Fixed 1-tick interval handling when mixed eod/intraday data was enabled
Fix toolbar display problem when manually sizing down the editor window to zero, closing and re-opening the editor
Bar requirements were not recalculated after modifying formula since introduction of drag-drop. Fixed now.
Added: You are about to save the file that is located in hidden drag-drop folder, do you want to move it to Custom folder so it is visible in the chart tree?" message
Plot() function protected against specifying negative color
Indicator exception handler calls now CleanupParser when exception occurred outside parser but still somewhere inside drawing routine so other indicators continue to work even if fatal exception occurred during drawing
added #include_once preprocessor command
When a formula was drag-and-dropped from the Chart tree on to the AA window, the formula loaded, but all the parameters were not reset from the previous formula. Fixed now.
ApplyStop changes: Fixed problem with trailing stop and exitatstop=2 in regular mode. Also better consistency of trailing stops between "Allow same day stop" mode set to true and false
action* constants now highlighted by AFL editor
additional PositionSize methods
New SetPositionSize function:

SetPositionSize( size, method )
'size' and 'method' parameters are ARRAYS:
'method' can be one of:
spsValue (=1) - dollar value of size (as in previous versions)
spsPercentOfEquity (=2) - size expressed as percent of portfolio-level equity (size must be from ..100 (for regular accounts) or .1000 for margin accounts)
spsShares (=4) - size expressed in shares/contracts (size must be > 0 )
spsPercentOfPosition (=3) - size expressed as percent of currently open position (for SCALING IN and SCALING OUT ONLY)

For example to liquidate 50% of position simply use

SetPositionSize( 50, spsPercentOfPosition * ( Buy == sigScaleOut ) );

spsNoChange (=0) - don't change previously set size for given bar (allows to write constructs like that):

SetPositionSize( 100, spsShares ); // 100 shares by default
SetPositionSize( 50, IIF( buy == sigScaleOut, spsPercentOfPosition, spsNoChange ) ); // for scale-out use 50% of current position size

New SetPositionSize function automatically encodes new methods of expressing position size into old "positionsize" variable as follows:
values below -2000 encode share count,
values between -2000 and -1000 encode % of current position
values between -1000 and 0 encode % of portfolio equity
values above 0 encode dollar value

Although it is possible to assign these values directly to old-style PositionSize variable, new code should use SetPositionSize function for clarity.

Example of code that exits 50% on first profit target, 50% on next profit target and everything at trailing stop:

Buy = Cross( MA( C, 10 ), MA( C, 50 ) ); Sell = 0; // the system will exit // 50% of position if FIRST PROFIT TARGET stop is hit // 50% of position is SECOND PROFIT TARGET stop is hit // 100% of position if TRAILING STOP is hit FirstProfitTarget = 10; // profit SecondProfitTarget = 20; // in percent TrailingStop = 10; // also in percent priceatbuy=0; highsincebuy = 0; exit = 0; for( i = 0; i < BarCount; i++ ) { if( priceatbuy == 0 AND Buy[ i ] ) { priceatbuy = BuyPrice[ i ]; } if( priceatbuy > 0 ) { highsincebuy = Max( High[ i ], highsincebuy ); if( exit == 0 AND High[ i ] >= ( 1 + FirstProfitTarget * 0.01 ) * priceatbuy ) { // first profit target hit - scale-out exit = 1; Buy[ i ] = sigScaleOut; } if( exit == 1 AND High[ i ] >= ( 1 + SecondProfitTarget * 0.01 ) * priceatbuy ) { // second profit target hit - exit exit = 2; SellPrice[ i ] = Max( Open[ i ], ( 1 + SecondProfitTarget * 0.01 ) * priceatbuy ); } if( Low[ i ] <= ( 1 - TrailingStop * 0.01 ) * highsincebuy ) { // trailing stop hit - exit exit = 3; SellPrice[ i ] = Min( Open[ i ], ( 1 - TrailingStop * 0.01 ) * highsincebuy ); } if( exit >= 2 ) { Buy[ i ] = 0; Sell[ i ] = exit + 1; // mark appropriate exit code exit = 0; priceatbuy = 0; // reset price highsincebuy = 0; } } } SetPositionSize( 50, spsPercentOfEquity ); SetPositionSize( 50, spsPercentOfPosition * ( Buy == sigScaleOut ) ); // scale out 50% of position
Change default value of "stop parsing at first error" pref switch to FALSE
Context-sensitive help system (press F1, and help page relevant to current dialog / menu is brought up)

Note that help itself is from version 4.60, so some topics may be missing yet, but it will be all updated with official release 4.70 as it will come with a new Users Guide.
Fixed bug: Drag-drop from one editor instance to another sometimes generated random characters in source editor
Added "Error 46. Missing comma" error message to the error list

CHANGES FOR VERSION 4.69.0 (as compared to 4.68.2)

Extended error information available now by pressing F1 key after highlighting error line
"Syntax error" message improved
[Now the parser attempts to tell you what is the exact reason of the error, so it may tell you for example that:a) there is probably missing semicolon in the previous lineb) that it is expecting '{' at the beginning of function bodyc) that it expects ( after "if" , "for" and "while"etc, etc.]
"Missing comma" error message added if there is no comma in variable declaration list or formal parameter list of the function
Error line position calculated correctly even if using #include in the formula
Word wrap feature removed (as it caused problems with reporting line number on syntax errors)
Fixed handling of "Parameter" dialog inside Auto-Analysis
Empty block statement allowed {}
Edit button in AA window has now Alt-D shortut instead of Alt-E (no conflict with &Exploration)

CHANGES FOR VERSION 4.68.2 (as compared to 4.68.1)

Improved syntax checking so it points to correct row/col even if case of block statements (completed: 2005-01-25)
[also with "bad arguments" error message arguments are now counted from 1 (instead of 0).]
AFL editor now highlights with yellow color the line in which error occurred (Win XP, Win 2000 only) (completed: 2005-01-25)
[(there is a setting that allows to turn of this feature in Tools->Preferences->Editor "Highlight error line")]
Error list in AFL editor (completed: 2005-01-25)
[All error messages are now displayed in the listbox beneath AFL editor. When you click on each error message, appropriate code line in the editor is localized.]
Improved handing of "stop on first error" flag (completed: 2005-01-25)
[Previously only syntax errors were terminating parsing, now also run time errors terminate parsing on first error (when "stop on first error" flag is set)]
Added protection against parser re-entry during formula execution (completed: 2005-01-25)
ListTrades method of Backtester object now produces output only when "Trade List" mode is selected in the settings (completed: 2005-01-25)
[In previous versions (4.68.x) this method listed trades regardless of output mode selected causing misaligned output when "summary" mode was selected or optimization was run]
Summary mode shows backtester metrics again (somehow it got broken in 4.68.1) (completed: 2005-01-25)

CHANGES FOR VERSION 4.68.1 (as compared to 4.68.0)

When re-displaying resizable window its stored size and position is now adjusted to fit on screen, also maximized state is stored separately (category: UI - General) (status: fixed) (completed: 2005-01-23)
[(sometimes users moved windows outside desktop and had trouble getting them back)]
The reminder message about "Show trade arrows" working in trade list mode is shown only once per session (category: UI - General) (status: changed) (completed: 2005-01-23)
Allow custom metrics to work with 3D optimization charts (category: AFL - Backtester) (status: fixed) (completed: 2005-01-23)

CHANGES FOR VERSION 4.68.0 (as compared to 4.67.0)

added: Default Custom backtest proc file path setting in the AA Settings -allows to define external formula that will be default user-defined backtester applied to all formulas that do not use its own procedure
added: SetCustomBacktestProc function to allow changing custom backtest procedure file from formula level

SetCustomBacktestProc( "filename", enable = True )
filename parameter instructs backtester to use external formula file as custom backtest procedure
if empty - it means use current formula

enable = True (default) - enables custom backtesting procedure (the same as SetOption("UseCustomBacktestProc", True );
enable = False - disables custom proc
added: new ListTrades method of Backtest object and NoTradeList optional parameter in Backtest method

This allows easier implementation of custom per-trade metrics. One can use Backtest( 1 ) to disable default listing of trades then iterate via position and trade list and then call ListTrades method. This is somewhat simpler then implementing entire backtest loop just to add few per-trade metrics.
added: Per-trade metrics
Trade object now features AddCustomMetric method.

Note that in contrast to Backtest.AddCustomMetric method that is usually called after PostProcess, the Trade.AddCustomMetric should be called before PostProcess call because PostProcess lists trades. Using Trade.AddCustomMetric after PostProcess gives no result, because trades are already listed.
added: new field suppoted by SetOption(): PortfolioReportMode
0 - trade list
1 - detailed log
2 - summary
3 - no output (custom only)
Fixed crash occuring when trying to display error message about COM exception and COM
Fixed "Reverse signal forces exit" handled incorrectly in 4.67.0
changed: BarsInTrade in Trade object should start from 1, not from 2
BarsInTrade property of Trade object is now zero-based. Note however that the value of zero is available only when trade is just opened in "low-level" approach, so normally you would see numbers >= 1 (all other reporting in AB remains as it was, so enter today and exit tommorrow counts as 2-bar trade)
fixed: click on "NEW" button in Formula editor should generate new file name in the toolbar
fixed: Re-enable SAVE button when formula name changes
added: Raw text output (allocated to: 4.68)
Backtester object features now RawTextOutput method that just outputs any string to the backtest result list at the time of the call. The user can output text formatted in multiple columns using \t (tab) character.
quick access to price arrays of open positions in Trade object (GetPrice method)

GetPrice( Bar, Field ) method of Trade object retrieves the values of the following fields:
O (Open)
H (High)
L (Low)
C (Close)
F (Fx currency rate)

NOTES:
1. GetPrice function is available only for OPEN POSITIONS, when called on closed trade returns Null value
2. Open interest field is not available GetPrice
3. Bar must be between 0..BarCount-1, otherwise exception will occur

CHANGES FOR VERSION 4.67.0 (as compared to 4.66.2)

when copy-paste results from Exploration, color codes appeared in Excel as "square" characters. Now it is fixed.
Automation interface change:
_Item (default property) with id of zero added to Stock.Quotations collection Old Item() property remains with id of 5. This should ensure backward-compatibility.
removed FreeExtra function to avoid possible memory fragmentation caused by constant growing/shrinking memory when accessing data from RT sources when requested bar count was twice as much as retrieved.
added error message when the plugin returns incorrect size of quote array
removed requesting of quotes from RT data plugins during database save (this should address exceeding symbol count when saving large databases running with eSignal plugin)
new method of Analysis OLE automation object:
Edit( [optional] ForceReload = False )

- displays AFL Editor window for currently loaded formula in AA window, optional ForceReload parameter (default=false) allows to force AFL edito to reload the formula from the file.

AB = new ActiveXObject("Broker.Application"); AA = AB.Analysis. AA.LoadFormula("myFormula.afl"); AA.Edit( 1 ); // force reload
new method of Analysis OLE automation object:
ShowWindow( nShowCmd ) - allows to show/minimize/maximize/restore AA window nShowCmd uses standard WinAPI values, few most popular:

SW_HIDE 0
SW_SHOWNORMAL 1
SW_SHOWMINIMIZED 2
SW_SHOWMAXIMIZED 3
SW_RESTORE 9
Scaling-in and scaling-out (pyramiding) is now supported by the backtester.
Two special constants: sigScaleIn / sigScaleOut added to provide means to tell the backtester when you want to scale-in/out

All you have to do to implement pyraminding is to:
- Assign sigScaleIn to BUY/SHORT variable if you want to scale-in (increase size of) LONG/SHORT position
- Assign sigScaleOut to BUY/SHORT variable if you want to scale-out (decrease size of) LONG/SHORT position

Scaling size is defined by PositionSize variable which in case of scaling defines not absolute positionsize but dollar increase or decrease.

IMPORTANT: Please note that backtester treats trade that you scale-in/out as SINGLE trade (i.e. will show single row in trade list). The only difference versus plain trade is that it will calculate average entry price (and avg. entry fx rate) based on all partial entries and average exit price (and avg. exit fx rate) based on all parial exits and will show average prices in entry/exit price field. The commission is of course applied correctly to each (partial) entry/exit depending on partial buy/sell size.

If you want to see details about scaling you have to run backtest in "DETAIL LOG" mode as only then you will see how scaling-in /out works and how average prices are calculated.

Note also that scaling-in/-out and multiple-currency support is available only in portfolio backtester. Old backtester as well as Equity() function do NOT handle scaling-in/out nor multiple currencies (they simply ignore scaling commands).

Easy examples:

a) dollar-cost averaging (each month you buy stocks for fixed dollar amount)

FixedDollarAmount = 500; MonthBegin = Month() != Ref( Month(), -1 ); FirstPurchase = Cum( MonthBegin ) == 1; Buy = IIf( FirstPurchase, 1, // True (or 1) represents regular buy signal IIf( MonthBegin, sigScaleIn, // each month increase position 0 ) ); // otherwise no signal Sell = 0; // we do not sell PositionSize = FixedDollarAmount;

b) dollar-cost averaging
(simplified formula because AB treats first sigScaleIn as buy anyway)

FixedDollarAmount = 500; MonthBegin = Month() != Ref( Month(), -1 ); FirstPurchase = Cum( MonthBegin ) == 1; Buy = IIf( MonthBegin, sigScaleIn, 0 ); // each month increase position Sell = 0; // we do not sell PositionSize = FixedDollarAmount;

c) increasing position when profit generated by trade without pyramiding
becomes greater than 5% and decreasing position when loss is greater than -5%

// percent equity change threshold when pyramiding is performed PyramidThreshold = 5; // regular trading rules (no pyramiding) Buy = Cross( MACD(), Signal() ); Sell = Cross( Signal(), MACD() ); e = Equity(1); // generate equity without pyramiding effect PcntProfit = 100 * ( e - ValueWhen( Buy, e ) )/ValueWhen( Buy, e ); InTrade = Flip( Buy, Sell ); // ExRem is used here to ensure that scaling-in/out occurs // only once since trade entry DoScaleIn = ExRem( InTrade AND PcntProfit > PyramidThreshold, Sell ); DoScaleOut = ExRem( InTrade AND PcntProfit < -PyramidThreshold, Sell ); // modify rules to handle pyramiding Buy = Buy + sigScaleIn * DoScaleIn + sigScaleOut * DoScaleOut; PositionSize = IIf( DoScaleOut, 500, 1000 ); // enter and scale-in size $1000, scale-out size: $500
fixed appearent hang occuring on rare occassions when backtesting very large symbol set with trade size limit and round lot sizes enabled. Under such conditions the price cache that backtester uses could fill up due to the delayed release when limit of trade volume was hit and round lot size or min. shares setting did not allow to enter smaller trade.
AFL editor changes:
- added separate menu
- auto-saving of formula when user triggers analysis from AA window instead of AFL editor
- when analysis is triggered from AA window and editor window is open then any parsing error brings editor to the top
AFL OLE support extended to allow SETTING OLE properties (previously only calling methods and getting properties was possible)

Now AFL supports setting/getting properties in usual (brace-less) way:

For example:

AB = CreateObject("Broker.Application"); Stock = AB.Stocks("MSFT"); Stock.FullName = "Microsoft"; // setting OLE property
(for advanced users only, work in progress)
implemented new interface allowing to control 2nd phase of portfolio backtest

This allows multitude of applications including, but not limited to:

a) position sizing based on portfolio-level equity
b) implementing advanced rotational systems (you have now access to ranking arrays and can decide what trades to take after knowing which symbols scores best on bar-by-bar basis)
c) adding your custom metrics to backtest and optimization statistics
d) implementing custom formulas for slippage control
e) advanced scaling-in/-out based on portfolio equity and other run-time stats
f) advanded trading systems that use portfolio-level statistics evaluated on bar-by-bar basis to decide which trades to take

Full documentation on this new interface will be posted in a separate document.

Note: this interface is work-in-progress and any documentation is preliminary and subject to change
logical operators between number and dispatch (OLE) objects are performed OK now. Also dispatch objects may be used in conditional expressions.

CHANGES FOR VERSION 4.66.2 (as compared to 4.66.1)

Custom Tools menu re-enabled again (it was disabled in 4.66.0 and 4.66.1)

CHANGES FOR VERSION 4.66.1 (as compared to 4.66.0)

fixed problem with duplicate chart sheets (which appeared in 4.66.0)

CHANGES FOR VERSION 4.66.0 (as compared to 4.65.2)

Multiple-currency support in backtester.
Now backtester allows to backtest systems on securites denominated in different currencies. It includes ability to use historical (variable) currency rates. Currency rates are definable in "Currencies" page in the preferences. The currency in which given symbol is denominated in can be entered in Symbol->Information page
"Currencies" page in Preferences - allows to define base currency and exchange rates (fixed or dynamic)
for different currencies. This allows to get correct backtest results when testing securities denominated in different currency than your base portfolio currency.
(for advanced users only, beginners should leave it untouched)
ability to change AFL formula root folder. Tools->Preferences->AFL

This not only changes preferences setting but also moves all formula files from old location to new one and
re-links all charts to files in new location. If you specify new folder please make sure to create an empty one. Do NOT use root directories like 'C:\'
(Please use this feature with caution, as it may cause problems if you have more than one copy of AmiBroker installed in different directories, and upgrade scripts may not find your new formula folder automatically, thus formulas shipped with AB may not be updated on next installation *)
* - actually I will make installers aware of new folder location but this will only work if you have one installation or if multiple installations use the same formula folder.
Custom indicator storage increased to 3000 slots
Tools->Preferences->Data, new settings
"In-memory cache size max MegaBytes" -
now allows to limit the in-memory cache size to certain amount of megabytes (in addition to limiting number of symbols). The default value is 20% of physical RAM size (calculated by AB at first run)
Indicator Maintenance Wizard (in Tools menu)
"Indicator Maintenance Wizard" scans all your hard drives for layout files, then reads them all and checks which indicators are in use, then presents you with a list of files that are not in-use and can be
deleted. Folders in drag-drop folder are automatically marked for deletion, the other can be marked manually. And with one click you can delete unused ones. The wizard can be run on whenever you need.
new Interactive Brokers plugin (1.3.0) that collects data for all symbols in RT quote window and forces AB to retrieve collected data even if no chart is displayed for given symbol nor any scan is run
(note this feature requires not only new plugin but also AmiBroker 4.66.0 or higher)

CHANGES FOR VERSION 4.65.2 (as compared to 4.65.1)

AFL Formula Editor: toolbar truncation problem solved
AFL Formula Editor: new "Analysis" button with submenu allows launching AA Scan/Exploration/Backtest/Optimize directly from the editor. Subsequent clicks on "Analysis" button repeat last selected action.
Automatic Analysis window redesigned:
- removed formula edit field - replaced by common editor that is accessible via "Edit" button,
- changing active formula via "Pick" button
- layout modifed - now more space for result list
- additional button ^ allows to extend result list to cover entire area of Auto-Analysis window.
- Now it is easy to have the same formula for indicator and AA. Just edit the formula and insert chart and use the very same formula in AA. Now when you modify the formula and save it - the changes will be immediatelly applied to both AA and IB.
Analysis menu accessible from Formula tree allows to load any formula from tree directly to AA window.
AA window is also drag-drop target window so you can load the formula to it via drag-drop too.

CHANGES FOR VERSION 4.65.1 (as compared to 4.65.0)

fixed unexpected exit of AmiBroker that happened when your formula had SetChartOptions() call and AFL Editor-> Verify or Insert chart was used
added automatic saving of fail-safe copy before "Verify" in AFL editor. Fail-safe copy is saved with .aflsafe extension. The copy is automatically deleted if check was OK and no crash occurred. In case of crash you can load the backup file to AFL editor (change "Files of type" combo to "Fail-safe AFL backup" in the Open File dialog)

CHANGES FOR VERSION 4.65.0 (as compared to 4.64.3)

AFL formula tree fold/unfold state restoring works with unlimited nesting levels
files and entire folders can be now moved using drag & drop mechanism in AFL formula tree. To MOVE files/folders drag them with RIGHT MOUSE BUTTON, to overlay on indicators - drag them using LEFT mouse button
unnecessary formula tree refreshes removed
multiple-level UNDO in AFL editor
multiple-level REDO in AFL editor
other minor 'undo' feature improvements (entering new line character triggers undo)
fixed crash when clicked AA->Parameters->Reset All
Formula Editor has now "Formula name" field that allows to specify file name quickly and save it without need to open "Save As" dialog
Files are stored by default in Formulas\Custom folder
Save As... toolbar icon replaced by Save drop down menu
Save function now uses "formula name" field (no need to open file dialog)
Scaling Min/Max properties now use plain edit fields (no sliders)
Negative custom scale works again
Numeric parameter editing enhanced:
- if you click on left-side part of the parameter value field then regular edit field is displayed
- if you click on right-side part of the parameter value field then slider control is displayed
- when "Step" argument in Param() function call is equal to zero, then slider is disabled and parameter is editable only via regular edit control
Formula Editor now features "Apply indicator" button that works like old "Apply"
(i.e. checks syntax, saves and inserts ONCE) as well as "Insert indicator" (available from submenu) that allows to insert multiple chart panes linked to the same formula
Formula Editor now has "Verify AFL" button that allows to verify syntax of your AFL
formula without saving
Automatic Analysis -> Individual Equity and Portfolio Equity now link directly to
"Formulas\Equity\Individual.afl" and "Formulas\Equity\Portfolio.afl" files. If you want to have your own customized equity chart you can modify those files (remember that they will be overwritten by setup program). You can also have unlimited number of your own equity charts defined as custom indicators.
Portfolio equity chart allows to turn on/off cash/drawdown/bars since last high/lin reg parts using Parameter dialog (by default they are all off)

CHANGES FOR VERSION 4.64.3 (as compared to 4.64.2)

fixed broker.newcharts file saving routine (should solve 'black panes' problem that appeared in 4.64.0)

CHANGES FOR VERSION 4.64.2 (as compared to 4.64.1)

during Layout/Template save, all currently used formulas are marked as 'used' so they do not get deleted if the user closes the pane using the same formula in some other layout. (Should solve 'black panes' problem that appeared in 4.64.0)
when choosing "Delete" option from the formula tree AmiBroker displays the warning message that the formula may be in used in some indicators if the formula was 'linked' to some pane at least once.

CHANGES FOR VERSION 4.64.1 (as compared to 4.64.0)

formula tree is refreshed after using "Save As..." function in Formula editor (to show any newly created files)
"Parameters" menu option is turned on always

CHANGES FOR VERSION 4.64.0 (as compared to 4.63.1)

QuickAFL is turned ON always
(it does not affect regular AFL code, only may affect some loops and/or plugins but a graceful period of almost 2 years was given to every user to get used to it and adjust the code if necessary, note: if particular formula needs all bars use SetBarsRequired function)
Quick built-in charts is turned ON always
Y-axis drag area is now thinner (to make de-selecting date easier)
resizing dialogs remember not only size but also position
time&sales windows remember size and positions separately for each symbol
time&sales window now uses TimeShift setting from "Intraday Settings" screen
max. trade drawdown stat figure is now also updated at exit price of the max. loss stop
on startup all formulas (built-in and custom) that were stored in broker.charts / broker.bcharts files are now automatically converted to individual AFL files and stored under: Formulas\Old\Built-in
and Formulas\Old\Custom
found and fixed few byte memory leak when using #include
#include can now read from registry using @ character
#include @LastBacktestFormula
will include the formula that was used in last backtest run (useful for custom equity formulas)
Workspace tab control now sizes down without displaying tab scroll bar
all TimeFrame* AFL functions extended to work with N-tick bars too. N-tick intervals are specified by NEGATIVE numbers passed in 'interval' parameter.
So for example:
TimeFrameSet( -10 ); // switch to 10-tick interval
Workspace -> Charts tree now supports file deletion, renaming, creation of new files and folders plus more via Right-mouse button (RMMB) menu. Options available from RMB menu:
- Insert - creates a copy of the selected file, insert _SECTIONS if necessary and inserts charts into new pane
- Insert Linked - just inserts chart into new pane - the pane links directly to selected formula (so if you have more than one pane using the same formula, modifying it will modify the chart in all panes linked to it)
- Overlay - overlays selected formula onto "active" pane. Active pane is the pane you have clicked on recently
- Edit - opens Formula Editor and loads selected file for editing
- Rename - allows to rename formula file
- Delete - deletes the formula (permanently !) - charts panes linked to it will become black
- New->Formula - creates new formula file
- New->Folder - creates new folder
- Refresh - refreshes directory/file tree
Indicator builder removed and replaced by "Formula Editor"
you can now control axis and grid settings from "Parameters" dialog
"Main" chart, "Indicators" and "Other indicators" preference pages removed. Now all charts use new drag & drop system

CHANGES FOR VERSION 4.63.1 (as compared to 4.63.0)

fixed one more multiple-monitor problem with color popup control
Parameters dialog works again in Automatic-Analysis window
new AFL function: ParamTrigger

ParamTrigger( "Name", "Button text")
- to be used in indicator builder - to create triggers (buttons).

If you place ParamTrigger in the indicator code it will create a "button" in Parameter dialog that can be pressed.
Normally ParamTrigger will return zero (0) but when button in the param window is pressed then it will refresh the chart and ParamTrigger will return 1 (one) for this single execution (further refreshes will return zero, until the button is pressed again)

Example:

trigger = ParamTrigger("Place Order", "Click here to place order"); if( trigger ) { // your one-shot code here }
new AFL function: ParamList

ParamList( "Name", "Values", default = 0 )
- generates the parameter that consist of the list of choices (specified in "values" parameter - | or comma separated). default parameter defines ordinal position of the default string value specified in "values" parameter.
Returned value is a STRING representing choosen item.

Example:

OrderType = ParamList("Order Type", "MKT|LMT|STP" );

CHANGES FOR VERSION 4.63.0 (as compared to 4.62.1)

6th parameter for the Param() - sincr - now has correct default value of zero.
trading arrows are correctly aligned again - there was a problem introduced in 4.62.1 with arrows alignment
fixed redraw problem of layers list
new AFL function added:
GetTradingInterface("Name")
- retrieves OLE automation object to automatic trading interface. "Name" is the interface name. You have to have trading interface installed separately to make it work otherwise you will get the error message attempting to use this function. Trading interface for Interactive Brokers will be released separately.
layer list item width is adjusted automatically now when sizing the workspace pane
colour-popup is aware of multiple-monitor configurations now and opens up on correct monitor.
'Arrange' works properly now after 'pane maximize'
added warning message when dropping files to AFL formula window.
added realtime Time&Sales window (View->Time & Sales, or right click over real time quote window)
Standard Edition: only one time & sales window open
Professional Edition: no limits on simultaneously open Time & Sales windows
Note that Time & Sales window requires true tick-by-tick streaming data source (like eSignal) to operate properly. Certain feeds may not provide enough information to allow time&sales window operation. eSignal has been tested and it works fine, as for the others - there will be 'compatibility guide' published soon.
added automatic marking on "show arrows" flag for old-style Price chart
new AFL function (advanced users only)
SetChartOptions( Mode = 0, Flags = 0, gridFlags = chartGridMiddle )
allows to set/clear/overwrite/set defaults for chart pane options
- Mode - specifies how options are set:
  - 0 - set only the DEFAULT values for new chart. Defaults are applied only once when chart is inserted in a new pane, so later you can modify any option using Indicator Builder
  - 1 - overwrite - the values specified in 2nd and 3rd argument overwrite any previously set values
  - 2 - set flag - flags specified in 2nd and 3rd parameter are binary-ORed with the current values, so effectively these options are set while remaining are unchanged
  - 3 - reset flag - flags specified in 3nd and 3rd parameter are cleared while the others remain unchanged.
- Flags - allowable flags are:
  chartShowDates, chartLogarithmic, chartShowArrow
- gridFlags - (for internal AmiBroker use - do not use it in your own coding as this parameter will be eventually removed) allowable values are: chartGridDiv100, chartGridPercent, chartGridDiv1000, chartGridMargins
  chartGridMiddle, chartGrid0, chartGrid30, chartGrid70, chartGrid10, chartGrid90,
  chartGrid50,chartGrid100,chartGrid20,chartGrid80,chartGrid1
  
  Example:
  to mark "Show arrows" by default in a new chart use
  SetChartOptions( 0, chartShowArrows );

CHANGES FOR VERSION 4.62.1 (as compared to 4.62.0)

new AFL function
ParamStyle("name", default = styleLine, mask = maskDefault ) - allows to select the styles applied to plot
new constants:
styleHidden - a combination of styleNoDraw | styleNoRescale
styleDashed - dashed line
to be used with ParamStyle
maskDefault - show thick, dashed, hidden, own scale styles (this is default mask for ParamStyle)
maskAll - show all style flags
maskPrice - show thick, hidden, own scale, candle, bar
maskHistogram - show histogram, thick, hidden, own scale, area
colorCycle - accepted only by ParamColor function as default value, causes that default color cycles through red, blue, green, turquoise, gold, violet, bright green, dark yellow
added new setting in Preferences->Charting "Ask for parameters of newly inserted indicators"
(default = TRUE) ensures that AmiBroker displays parameter dialog when inserting or dropping new indicators
removed obsolete "max number of custom indicators" setting
Param() function accepts 6 parameters now
Param("name", defvalue, min = 0, max = 100, step = 1, sincr = 0 );
(Only for advanced users)
a new parameter sincr is defines the increase of default value when more than one section of the same kind is inserted (dropped) onto the chart
For example:
Periods = Param("Periods", 15, 2, 200, 1, 10 );
Plot( MA( P, Periods ), _DEFAULT_NAME(), ParamColor( "Color", colorCycle ), ParamStyle("Style") );

now when more than one moving average is dropped onto the chart then subsequent moving averages default to 15, 25, 35, 45, ... and so on (starting value is 15, increase per new section is 10)

CHANGES FOR VERSION 4.62.0 (as compared to 4.61.0)

implemented indicator drag and drop mechanism. See video tutorial: http://www.amibroker.net/video/dragdrop1.html
new "Chart" tab in the workspace window (lists all AFL files and directories from "Formulas" subfolder)
Automatic Analysis formula window is now drag&drop target too (you can drag formulas and AFL files onto it)
new AFL special functions used to automatically create formulas from code snipplets dragged onto the the indicator pane.
_SECTION_BEGIN, _SECTION_END, _SECTION_NAME, _DEFAULT_NAME, _PARAM_VALUES
new styleNoTitle causing that given Plot name and values are not included in the title bar of the indicator
new ParamField function allowing to pick price field
new ParamToggle function allowing for boolean (Yes/No) parameters
In Tools->Preferences , Keyboard you can how define single key shortcut for maximizing and restoring chart pane via View : PaneToggle
"Allow mixed EOD/intraday data" switch does not affect N-day bars anymore
Parameters are not reset to default values when changing the formula- user-edited values are kept
new parameters dialog allowing using sections (for example from drag&drop generated code)
parameters dialog displays the items in the order as they appear in the formula
fixed Y-axis scale shrinking problem occuring when styleOwnScale was used for all plots
Insert->Standard Charts, Insert->Custom Indicators menu options removed (now everything is handled by drag & drop) (You can still insert old indicators from Indicator Builder dialog though)

CHANGES FOR VERSION 4.61.0 (as compared to 4.60.4)

custom time interval support extended to N-day bars.

Now you can define N-day bars in Preferences (Intraday tab) as well as you can use N-day bars via TimeFrame functions. For example
TimeFrameSet( 3 * inDaily ); // switch to 3-day time frame

VERY IMPORTANT:
inWeekly constant is now 432001 ( 5*inDaily + 1 ) - in previous version it was 432000
inMonthly constant is now 2160001 ( 25*inDaily + 1 ) - in previous version it was 2160000

It is changed because now N-day custom intervals are supported and they will interfere with weekly/monthly.
Note that 5*inDaily is now DIFFERENT than inWeekly. 5*inDaily creates 5-day bars that DO NOT necesarily cover Monday-Friday
while inWeekly ALWAYS creates bars that begin on Monday and end on Friday. Also 25*inDaily creates 25-day bars that DO NOT necesarily represent full month, while inMonthly always begins with first day of the month and ends at the last day of the month

CAVEAT:
if your code uses hard-coded numbers like 432000 for weekly and 2160000 for monthly then you MUST change your code to use inWeekly constant and inMonthly constant instead.
Study properties dialog has now new checkbox
"Lock position" - when checked study can not be moved or re-sized
ExitAtStop has a new meaning for N-BAR stop type.
If ExitAtStop = 0 then N-bar stop has the lowest priority (so if for example profit target stop is hit on the same bar then profit target is evaluated first)
If ExitAtStop = 1 then N-bar stop has highest priority and it is evaluated before all other stops.
The same effect is obtained by checking "Has priority" box in AA Settings window.
new maximizing/restoring chart pane functionality available via:
View->Pane->Maximize
View->Pane->Restore
as well as via right click menu.

Remember that you can assign your own keyboard shortcuts for that using Tools->Preferences->Keyboard
New drawing tool: Arrow
- draws a line that ends with an arrow
New drawing tool: zig-zag line
draws a series of connected trend lines (Hint: press ESC key to finish the series)
new File functions in AFL:
- fdelete( "filename" ) - deletes file
  "filename" is path to the file name (relative or full path).
  If just file name without path is specified then AmiBroker directory is used, returns TRUE if file successfully deleted, FALSE otherwise
- fmkdir( "dirname" ) - creates (makes) a directory
  "dirname" specifies path of the directory to be created. Please note that this function creates only ONE directory at a time.
  So if you want to create nested directory tree you have to call it multiple times, for example to create C:\MyDirectory\MySubDirectory folder you have to call it twice:
  
  fmkdir( "C:\\MyDirectory" ); fmkdir( "C:\\MyDirectory\\MySubDirectory" );
  
  Note also that it is safe to call it even if directory already exists (then no change to file system is applied)
  Returns TRUE if directory successfully created, FALSE otherwise
- frmdir( "dirname" ) - removes a directory
  "dirname" specifies path of the directory to be removed. Please note that this function removes only ONE directory at a time.
  So if you want to remove nested directory tree you have to call it multiple times, for example:
  
  fmkdir( "C:\\MyDirectory\\MySubDirectory" ); // delete nested subdir first fmkdir( "C:\\MyDirectory" );
  
  Note that directory must be empty before removing it otherwise it will not be possible to remove it.
  Returns TRUE if directory successfully removed, FALSE otherwise

CHANGES FOR VERSION 4.60.3 (as compared to 4.60.2)

third point in 3-point drawing tools like triangle, pitchfork and fib extensions is now snapped precisely when snap-to-price is enabled
user can override the maximum number of bars per symbol that AB allows

CHANGES FOR VERSION 4.60.2 (as compared to 4.60.1)

october appears on date axis on weekly charts
fixed small issue with returning global variables from functions (problem appeared in 4.60.1 only)
zero level in performance grid is plotted with default grid color
fixed adding separator characted when percent scale is used
fixed problem with N/A results occuring when trade size limit by symbol volume was hit and round lot size was set to zero.
Title variable templates: making Title statements easy.
Now you can embed special tokens in Title variable
that are replaced by appropriate values at run-time.
if you use {{VALUES}} inside Title string
it will be replaced by automatic-values generated by Plot function calls.
if you use {{NAME}} it will be replaced by ticker symbol.
if you use {{DATE}} it will be replaced by selected date
if you use {{INTERVAL}} it will be replaced by name of the interval
Example:
Title = "{{NAME}} - {{INTERVAL}} {{DATE}} - MyChart : {{VALUES}}";
added information about the length of the cycle (in bars) when using
cycle drawing tool

CHANGES FOR VERSION 4.60.1 (as compared to 4.60.0)

AA->Settings->Portfolio "Disable trade size limit if data bar has the volume of zero" (true by default). When it is turned ON and the entry bar volume is zero
the backtesterwill not apply the "limit trade size as % of entry bar volume"- this is to allow backtesting mutual funds that come with zero volume data When it is OFF and entry bar volume is zero then backtester will not allow to enter the trade on such bar.
AA->Settings->Portfolio "Use Previous Bar Equity For Pos Sizing" and new field supported by SetOption/GetOption:
"UsePrevBarEquityForPosSizing"
Affects how percent of current equity position sizing is performed.
False (default value) means: use current (intraday) equity to perform position sizing,
True means: use previous bar closing equity to perform position sizing
cosmetic issues:
- replaced "stock" with "symbol" in some strings
- fixed minor painting problem occuring with cycle study drawn on intraday charts
- using SelectedValue function does not grow future bar requirements anymore
added StaticVarGetText to make using text static variables easier
http://www.amibroker.com/f?staticvargettext
new built-in chart: Relative Performance - use right-click "Parameters" to change the ticker list.
ATR uses more bars now when quickafl is on
scoreNoRotate is now highlighted in AFL editor
fixed problem with access violations occuring sometimes when calling the same function many times in single line and return statement in the form: return varname;
Status function supports now
"firstvisiblebar", "lastvisiblebar", "firstvisiblebarindex", "lastvisiblebarindex"

CHANGES FOR VERSION 4.60.0 (as compared to 4.59.0)

fixed problem with not displaying 3D charts when profit was >1000%
(comma used as a thousand separator was causing problems - now the separator is removed from the data file)
O3G 3D graphing program improvements:
- optional flat orthogonal view
- translucent water level surface. You can move water level using PageUp/PageDown keys and/or toolbar buttons Thanks to Mark Feierstein for suggesting this.
- sizing and centering works much better now
- better font spacing/sizing
- you can now view the 3D chart of ANY statistic from optimization results just CLICK on the list column HEADER you wish to chart and then choose Report->3D graph and you will see the chart of selected metric.
charting improvements
- when text tool is active, selecting other tool automatically accepts the text tool entry (no need for additional click on a chart to accept). (You can of course abandon edits by pressing ESC key)
- trend-line bug (affecting other drawing tools) eliminated. (sometime on multi-chart and multi-symbol setups the trendline randomly become almost horizontal, now it is fixed)
- new drawing tool: CYCLE study
  - pick start and end points and AmiBroker will plot 30 equally-spaced cycles toward the past and 30 cycles towards the future
- new drawing tool: Fibonacci Extensions (Price)
  - pick start and end point of the controlling trend line, then pick THIRD point where extension lines will start
- new drawing tool: Fibonacci Time Extensions
  - pick start and end point and AmiBroker will plot time cycle lines that will represent fibonacci ratios multiplied by the number of bars between start and end point
- drawing three point objects (triangle, pitchfork, and Fib Extensions) simplified(now you can just click in three places - it is easier for the beginners than clicking, holding down and dragging as it worked previously. Old mode of operation works too)
minor other fixes
- % sign appears again on grids using percent style

CHANGES FOR VERSION 4.59.0 (as compared to 4.58.0)

added 3D, animated surface graph showing 2-parameter optimization results
(Automatic Analysis, Optimize button menu -> View 3D optimization graph

O3G - the 3D graphing program is pretty self-explaining.
Please note that you can move/rotate/animate the surface plot by mouse, keyboard and toolbar buttons.

Mouse controls:
- to Rotate - hold down LEFT mouse button and move in X/Y directions
- to Zoom-in, zoom-out - hold down RIGHT mouse button and move in X/Y directions
- to Move (translate) - hold down LEFT mouse button and CTRL key and move in X/Y directions
- to Animate - hold down LEFT mouse button, drag quickly and release button while dragging

Keyboard controls:
SPACE - animate (auto-rotate)
LEFT ARROW KEY - rotate vert. left
RIGHT ARROW KEY - rotate vert. right
UP ARROW KEY - rotate horiz. up
DOWN ARROW KEY - rotate horiz. down
NUMPAD + (PLUS) - Near (zoom in)
NUMPAD - (MINUS) - Far (zoom out)
NUMPAD 4 - move left
NUMPAD 6 - move right
NUMPAD 8 - move up
NUMPAD 2 - move down

You can also copy the image as bitmap using Edit->Copy image
intraday bar's portfolio equity (IBPE) is calculated from current bar open price (IBPE is used only to calculate position size values when % of portfolio is specified and reported only in 'detail log' mode). end-of-bar equity (reported by equity chart) is calculated from close price (as it always was)
status bar is automatically shown when Crosshair tool is turned on

CHANGES FOR VERSION 4.58.0 (as compared to 4.57.0)

9 new AFL functions:

NoteGet( "Symbol" );
- retrieves note linked to "symbol". If symbol is "" (empty string) then current symbol is used

NoteSet( "Symbol", "Text..." );
- sets text of the note linked to "symbol".
If symbol is "" (empty string) then current symbol is used.

If you overwrite note from AFL level that is opened at the same time in Notepad editor the editor will ask you (when you switch the focus to it) if it should reload new text or allow to save your manually entered text.

Example:
NoteSet("AMD", "Jun 15, 2004: AMD will deliver its first multi-core processors next year");

ClipboardSet( "Text" );
- copies the "text" to the Windows clipboard

ClipboardGet()
- retrieves current contents of Windows clipboard

// this can be used to put dynamically-constructed texts into // clipboard // ClipboardSet( "The price of " + FullName() + " is " + Close );

VarSet( "varname", value )
- sets the value of dynamic variable*

VarGet( "varname" )
- gets the value of dynamic variable*

StaticVarSet( "varname", value )
StaticVarSetText( "varname", "value" )
- sets the value of static variable**

StaticVarGet( "varname" )
- gets the value of static variable**

* Dynamic variables are variables that are named dynamically, typically by creating a variable name from a static part and a variable part. For example, the following example dynamically constructs the variable name from a variable prefix and a static suffix.

for( i = 1; i < 10; i++ ) { VarSet( "C"+i, Ref( C, -i ) ); } // creates variables C1, C2, C3, C4, ...., C10 equal to Ref( C, -1 ), Ref( C, -2 ), ..., Ref( C, -10 ) // respectively

** Static variable - the variable has static duration (it is allocated when the program begins and deallocated when the program ends)
and initializes it to Null unless another value is specified. Static variables allow to share values between various formulas.
Only NUMBER and STRING static variables are supported now (not ARRAYS).
new Preferences: Intraday setting
"Override: Weekly/monthly bars use day of last trade"
when checked (default) then weekly/monthly charts always use timestamp of the day of last trade within a week/month (may not be Friday or last day of the month) regardless of what is set in "Time stamp of compressed intraday bars shows" radio buttons
If you uncheck this box and "time stamp of compressed intraday bar" is set to END TIME of the interval, then weekly bars will be time-stamped with last day of the week (sunday) and monthly bars will be time-stamped with last day of the month regardless if trading has occured on that day or not.
AddToComposite now by default deletes all previous data instead of setting existing fields to zero at the start of the scan.
The flag default flag 1 has now the name of atcFlagDeleteValues the old flag (now optional) atcFlagResetValues now has value of 32. Most formulas using ATC should not be affected by that change.
AA: Settings: "Pad and align to reference symbol" is now available for all AA modes (not only portfolio backtest).
This allows for example to turn on aligning when running scans with AddToComposite and thus ensuring that data holes do not generate valleys in composites. This is useful to create intraday composites when data holes/misalignment is often. (when creating intraday composites it is now recommended to check alignining as well as changing "Time compressed bars use START (or END) time of interval" in Tools->Preferences->Intraday)

CHANGES FOR VERSION 4.57.0 (as compared to 4.56.1)

profit distribution chart took a bit long when profits were extremely large - now it is fixed
changed vertical line selection code to prevent line disappearing after RT update
vertical line selection is now working fine in multiple linked windows displaying different time frames
chart panes can be now moved up/down using View->Pane->Move Up/Down without need to re-insert everything to change the order
fixed 'approx. X days' text in the "Database Settings" window that reported wrong values in versions 4.53..4.56
when "show arrows" option is selected in AA window then correct interval is selected in the chart (it was not functioning properly for beta versions 4.53..4.56 and intraday data)
added Notepad window (View->Notepad) that allows to store free-text notes about particular security. Just type any text and it will be automatically saved / read back as you browse through symbols. Notes are global and are saved in "Notes" subfolder as ordinary
text files.
implemented browser-like history Back/Forward in menu View->History and in the toolbar,(keyboard shortcuts Back: Ctrl+Alt+LEFT, Forward: Ctrl+Alt+RIGHT, you can change it in Tools->Prefs->Keyboard) Please note that due to customization features of the toolbar on old installations the Back/Forward buttons will not appear unless added manually (click with RIGHT mouse button over standard toolbar, select "CUSTOMIZE" menu and add Back/Forward buttons.)

CHANGES FOR VERSION 4.56.1 (as compared to 4.56.0)

fixed crash at address: 0x474f54
fixed K-ratio calculation. Now follows exactly corrected Excel sheet from page 89 of "Quantitative Trading Strategies" by Lars Kestner (published 2003).
because of many people not reading the comment regarding new "Limit trade size as % of entry bar volume" setting, implemented checking for volume = 0 in data files. If volume is equal to 0 in your data file then this trade size limit does not apply.

CHANGES FOR VERSION 4.56.0 (as compared to 4.55.1)

fixed crash when RT quote window ticker list contained symbol that did not exist in the database
added Toolbar customization:
right-click over any toolbar and choose "CUSTOMIZE" menu to add/remove/arrange toolbar buttons. You can also press ALT key and move/arrange buttons within one toolbar without needing to open "customize" dialog
eSignal plugin 1.7.1: fixed problem with zero data when the user selected not enough bars to load (mixed mode requires a bit more bars)

CHANGES FOR VERSION 4.55.1 (as compared to 4.55.0)

implemented workaround to Windows XP status bar display problem causing plugin status indicator not 'disappearing' sometimes
fixed problem with crash sometimes occuring when calling Import() OLE automation method
when AB was not running.
Versions 4.54-4.55 are localization-enabled and month names are localized too, localized strings have to be setup at the start of the program, but this was working correctly only if GUI was launched. When creating AB OLE object without GUI month name string were not
set-up correctly and this caused problems. (This fixes problems with CSI/UA export as well as AQ trying to import to non-existing instance of AB)
fputs/fgets/fclose/feof file functions are now protected against using null file handle
(common coding error among AFL users)
Parameter names are not truncated in the parameter list

CHANGES FOR VERSION 4.55.0 (as compared to 4.54.0)

Median and Percentile calculations include current bar
new symbols added via CategoryAddSymbol trigger workspace ticker list refresh
calling COM methods returning nothing (void) does not cause "type mismatch" message
duplicate parameters are no longer produced when user specifies parameter names with trailing/leading spaces in Param()/ParamStr()/ParamColor()
now it is safe to call AB.RefreshAll() from inside of AmiBroker because this method is protected against locking up / looping by not allowing consequent refresh if previous refresh occured in less than one second
Parameters window now is resizable
Parameters window now support date and time parameters.
Corresponding new AFL functions are:

ParamDate( "Name", "Default date", format = 0 );

where:
"Name" is a string holding parameter name
"Default date" is a string holding date in any any format:
YYYY-MM-DD
MM/DD/YY
DD-MM-YY
etc, etc.

format - defines return value format, allowable values are:
0 - return value is a NUMBER and holds DateNum. Ie: 990503 for May 3, 1999,
1 - return value is a STRING formatted holding date according to your windows regional settings

ParamTime( "Name", "Default time", format = 0 );
where:
"Name" is a string holding parameter name
"Default time" is a string holding date in any of the following formats:
HH:MM:SS
HH:MM

format - defines return value format, allowable values are:
0 - return value is a NUMBER and holds TimeNum. Ie: 133515 for 13:35:15
1 - return value is a STRING formatted holding time according to your windows regional settings

Examples:
Title = WriteVal( ParamDate("ParamDateAsDateNum","2004-05-14"), 7.0 ); Title = ParamDate("ParamDateAsString","2004-05-17",1);

portfolio/individual backtester/optimizer, new setting in AA->Settings->Portfolio:
"Limit trade size as % of entry bar volume" (default = 10%)

This prevents from entering the trades greater than given percentage of entry bar's volume.
For example if backtesting daily data and today's volume for thinly traded stock is 177,000 shares, setting this to 10% will limit the maximum trade size to 17,700 shares (10% of total daily volume). This prevents from 'affecting the market'
by huge orders.

IMPORTANT NOTE:
Some instruments like MUTUAL FUNDS come without VOLUME data. To backtest such instruments please set this field to ZERO (0). This effectively turns OFF this feature. Otherwise you won't be able to enter any trade at all. Suggestions are welcome how to handle this problem automatically (maybe just detect if bar's volume is ZERO and then allow entering any size?)
K-ratio calculation changed following the change made by its creator, Mr. Lars Kestner.

Quoting from the book "Quantitative Trading Strategies" from 2003 by Lars Kestner:

[ - - - ]
" The K-ratio is a unitless measure of performance that can be compared across markets and time periods. [ - - - ] Traders should
search for strategies yielding K-ratios greater than +0.50. Together, the Sharpe ratio and K-ratio are the most important
measures when evaluating trading strategy performance. Note: When I created the K-ratio in 1996, I thought I had created a
robust measure to evaluate performance. In mid-2000, trader Bob Fuchs brought a small error to my attention regarding the
scaling of the K-ratio. He was correct in his critique and I have corrected the error in this text. Publications prior to 2002 will
show a different formula for the K-ratio. The updated formula in this book is correct."
Mr Lars Kestner has corrected his formula based on this critique:
K-ratio = slope / ( sterr * per )
slope: Linear regression slope of equity line
sterr: Standard error of slope
per: Number of periods in the performance test

Special thanks to Jeremy Berkovits who brought that to my attention.

CHANGES FOR VERSION 4.54.0 (as compared to 4.53.1)

"Allow mixed EOD/intraday data" mode added (controllable from File->Database Settings->Intraday, checkbox with the same name) it allows to work with database that has a mixture of intraday and EOD data in one data file. If this is turned on then in intraday modes EOD bars are removed on-the-fly and in daily mode EOD bars are displayed instead of time compressed intraday or if there is no EOD bar for corresponding day then intraday bars are compressed as usual.
This mode works in conjunction with new versions of plugins that allow mixed data. Mixed mode is now supported by MarketCast plugin (1.1 or higher)(Australia) and eSignal plugin (1.7.0 or higher) only.

Mixed mode allows intraday plus very long daily histories in one database.

Note that this is EXPERIMENTAL feature.

+ Real-Time quote window enhanced
Now only fields that are changed change the background to 'yellow' and if the value in given field increases then it is displayed in green if decreases then is displayed in red. This allows easy identification of movement.

+ all strings in the program moved to resources for easy localization

+ fixed problem with SetForeign()+FullName() returning symbol instead of full name of foreign security.

+ added new AFL function IsContinuous() to check if "continuous" flag is turned on in Symbol->Information window

+ OLE properties can be retrieved (DISPATCH_PROPERTYGET) directly from AFL now using parameterless function syntax. This allows reading values exposed by OLE automation directly from AFL code. Example:

AB = CreateObject("Broker.Application"); Stocks = AB.Stocks(); // get collection Stock = Stocks.Item( Name() ); // currently selected "FullName : " + Stock.FullName(); "Alias : " + Stock.Alias(); "Address : " + Stock.Address(); "Shares: " + Stock.Issue(); "Book value: " + Stock.BookValue(); "Market : " + Stock.MarketID(); "WebID : " + Stock.WebID();

You can check if OLE object is valid by calling IsNull() function, example:

AB = CreateObject("Broker.Application"); Stocks = AB.Stocks(); // get collection Stock = Stocks.Item( "INTC" ); if( IsNull( Stock ) ) { printf("COM object invalid (Null) - symbol does not exist\n"); } else { printf("COM object valid - you can access its methods\n"); }

+ IsEmpty/IsNull and IsTrue functions operate with scalars and OLE dispatches without upsizing them to array

CHANGES FOR VERSION 4.53.1 (as compared to 4.53.0)

addressed problem with broker.layers file. Now version 4.53.1 correctly reads broker.layers file saved with older versions however note that old versions are not compatible with new format.
layer properties dialog provides more comfortable setting of layer visibility
other minor fixes

CHANGES FOR VERSION 4.53.0 (as compared to 4.52.0)

per-group intraday settings (filtering/daily compression) Use Symbol->Categories: "GROUP" -> Use own intraday settings, click
on "Intraday settings" button to define intraday settings specific to given group.
intraday settings now allow to specify separate day (RTH) and night (ETH) sessions
time filtering now allows to display:
a) 24 hours trading (no filtering)
b) day session only
c) night session only
d) day and night sessions only
new intraday time compression mode: Day/Night - shows two bars (day and night) per day
daily compression can be now based on
a) exchange time (available since 4.00)
b) local time (available since 4.50)
c) day/night session times definable by the user (new)
when "activatestopsimmediately" is turned ON then cash from stopped out positions is NOT available to enter trades the same day
easy access to selected category settings from Symbol->Information window.
Workspace tree supports in-place editing of market, group, sector, industry and watch list names. Single click on category name and just enter the name

CHANGES FOR VERSION 4.52.0 (as compared to 4.51.1)

fixed problem with fixup=0 and handling multiple data holes in a row
added new commands to ASCII format definitions:
$MINTICKERLEN <number> - defines minimum accepted length of the ticker symbol
$MAXTICKERLEN <number> - defines maximum accepted length of the ticker symbol
For example ASX users may wish to use
$MAXTICKERLEN 3
to make sure that ASCII importer accepts only symbols that have no more than 3 characters (this excludes ASX options and warrants)
fixed problem with incorrect very first value of the array returned by variable-period version of HHV/LLV
fixed Procedure/function parameter overwrite issue when using built-in price arrays and variable overwrite issue
memory allocated for return value is marked for earlier freeing so calling user-defined functions inside loops should consume less memory
Interval() function enhanced. Now accepts format parameter:
Interval( format = 0 );
possible values:
format = 0 - returns bar interval in seconds
format = 1 - as above plus TICK bar intervals are returned with negative sign
so Interval() function applied to 10 tick chart will return -10
format = 2 - returns STRING with name of interval such as "weekly/monthly/daily/hourly/15-minute/5-tick"
vertical quote selection line in linked windows is now independent
changing "same day stops" via SetOption("ActivateStopsImmediately") in portfolio backtest mode has an effect now (previously reacted only on manual settings)
SetOption("CommissionMode", mode ) works now in portfolio mode too (previously worked
in old backtest mode only)
SetOption("CommissionAmount", amount ) works now in portfolio mode too (previously worked
in old backtest mode only)
$SEPARATOR command in ASCII importer definitions now allows to import files that have fields separated by more than one separator characters Separator string (array of characters) must be enclosed in quotation marks. If there is only one separator character (as in old versions) then quotation marks are needed.
For example files with joined date and time

$SEPARATOR ", "
$FORMAT DATE_YMD,TIME,OPEN,HIGH,LOW,CLOSE

will be able to import file like this:
2004-02-04 12:30,3.41,3.44,3.40,3.42
(note date and time field are separated by space not by comma)
Import wizard now supports new separators 'comma or space', 'semicolon or space' and 'tab or space'
ASCII importer and Quote Editor properly
distinguish records with time specified as 00:00:00 from EOD records (without time)

CHANGES FOR VERSION 4.51.1 (as compared to 4.51.0)

OLE interface methods numbering adjusted to maintain backward compatibility with previous versions and other programs referring to old OLE interface

CHANGES FOR VERSION 4.51.0 (as compared to 4.50.10)

OLE automation interface changes:
Analysis.Backtest and Analysis.Optimize now support new "Type" parameter.
Type can be one of the following values:
0 : portfolio backtest/optimize
1 : individual backtest/optimize
2 : old backtest/optimize

For backward compatibility Type parameter is optional and defaults to 2
(old backtest/optimize)

Example code:

AB = new ActiveXObject("Broker.Application");
AB.Analysis.Backtest( 0 ); // perform portfolio backtest
AB.Analysis.Optimize( 0 ); // perform portfolio optimize
OLE automation interface new object: "Commentary"

This object has 5 methods:
- BOOL LoadFormula( STRING pszFileName ) - loads the formula
- BOOL SaveFormula( STRING pszFileName ) - saves the formula
- void Apply() - displays the commentary
- BOOL Save( STRING pszFileName ); - saves commentary output (result) to the file (use after call to Apply())
- void Close() - closes the commentary window

Commentary object is accessible from Broker.Application object via Commentary property:

Example code:

AB = new ActiveXObject("Broker.Application");
AB.Commentary.LoadFormula("C:\\Program Files\\AmiBroker\\AFL\\MACD_c.afl");
AB.Commentary.Apply();
AB.Commentary.Save("Test.txt");
AB.Commentary.SaveFormula("MACDTest.afl");
//AB.Commentary.Close();
AFL function Now( format = 0 ) accepts new parameter values

Returns current date / time in numerous of formats:
// formats supported by old versions
format = 0 - returns string containing current date/time formatted according to system settings
format = 1 - returns string containing current date only formatted according to system settings
format = 2 - returns string containing current time only formatted according to system settings
format = 3 - returns DATENUM number with current date
format = 4 - returns TIMENUM number with current time
format = 5 - returns DATETIME number with current date/time
// new formats available from version 4.51
format = 6 - returns current DAY (1..31)
format = 7 - returns current MONTH (1..12)
format = 8 - returns current YEAR (four digit)
format = 9 - returns current DAY OF WEEK (1..7, where 1=Sunday, 2=Monday, and so on)
format = 10 - returns current DAY OF YEAR (1..366)
Custom indicators:
If plot name is empty the value of such plot does not appear in the title
and does not appear in the data tool tip

Plot( C, "Price", colorWhite, styleCandle );
Plot( MA( C, 10 ), "", colorRed ); // NOTE that this plot name/value will NOT appear in the title
Plot( MA( C, 20 ), "MA20", colorGreen );
SetOption( "field", value )
accepts new fields:
"CommissionMode" -
0 - use portfolio manager commission table
1 - percent of trade
2 - $ per trade
3 - $ per share/contract

"CommissionAmount" - amount of commission in modes 1..3

"MarginRequirement" - account margin requirement (as in settings), 100 = no margin

"ReverseSignalForcesExit" - reverse entry signal forces exit of existing trade (default = True )
new AFL function: GetOption( "field" ) - retrieves the settings, accepted fields the same as in SetOption.

Example:

PositionSize = -100 / GetOption("MaxOpenPositions");
new AFL function: GetRTData( "field" )
- retrieves the LAST (the most recent) value of the following fields
reported by streaming real time data source )
(Note 1: this function is available ONLY in PROFESSIONAL edition,
calling it using Standard edition will give you NULL values for all fields)
(Note 2: works only if data source uses real time data source (plugin) )
(Note 3: availablity of data depends on underlying data source
- check the real-time quote window to see if given field is available )
(Note 4: function result represents the current value at the time of the call
/formula execution/, and they will be refreshed depending on chart or commentary refresh interval
/settable in preferences/. Built-in real time quote window is refreshed
way more often (at least 10 times per second) )

Supported fields:
"Ask" - current best ask price
"AskSize " - current ask size
"Bid" - current best bid price
"BidSize " - current bid size
"52WeekHigh" - 52 week high value
"52WeekHighDate" - 52 week high date (in datenum format)
"52WeekLow" - 52 week low value
"52WeekLowDate" - 52 week low date (in datenum format)
"Change" - change since yesterdays close
"Dividend" - last dividend value
"DivYield" - dividend yield
"EPS" - earnings per share
"High" - current day's high price
"Low" - current day's low price
"Open" - current day's open price
"Last" - last trade price
"OpenInt" - current open interest
"Prev" - previous day close
"TotalVolume" - total today's volume
"TradeVolume" - last trade volume
"ChangeDate" - datenum (YYYMMDD) of last data change
"ChangeTime" - timenum (HHMMSS) of last data change
"UpdateDate" - datenum (YYYMMDD) of last data update
"UpdateTime" - timenum (HHMMSS) of last data update
"Shares" - total number of shares

Example:
"Bid = "+GetRTData("Bid");
"Ask = "+GetRTData("Ask");
"Last = "+GetRTData("Last");
"Vol = "+GetRTData("TradeVolume");

"EPS = "+GetRTData("EPS");
"52week high = "+GetRTData("52weekhigh");
Custom indicators:
Default names and graph values appear in the title
when using old-style graph0, graph1, graph2 statements in the custom indicators

CHANGES FOR VERSION 4.50.5 (as compared to 4.50.4)

very minor fixes and cosmetics

CHANGES FOR VERSION