AFL Function Reference - Categorized list of functions

Basic price pattern detection

• FFT - performs Fast Fourier Transform (AFL 2.90)
• GAPDOWN - gap down
• GAPUP - gap up
• INSIDE - inside day
• OUTSIDE - outside bar
• PEAK - peak (AFL 1.1)
• PEAKBARS - bars since peak (AFL 1.1)
• TROUGH - trough (AFL 1.1)
• TROUGHBARS - bars since trough (AFL 1.1)
• ZIG - zig-zag indicator (AFL 1.1)

Composites

• AddToComposite - add value to composite ticker (AFL 2.0)
• ADLine - advance/decline line (AFL 1.2)
• AdvIssues - advancing issues (AFL 1.2)
• AdvVolume - advancing issues volume (AFL 1.2)
• DecIssues - declining issues (AFL 1.2)
• DecVolume - declining issues volume (AFL 1.2)
• TRIN - traders (Arms) index (AFL 1.2)
• UNCISSUES - unchanged issues (AFL 1.2)
• UNCVOLUME - unchaged issues volume (AFL 1.2)

Date/Time

• BarIndex - get zero-based bar number (AFL 2.3)
• BeginValue - Value of the array at the begin of the range (AFL 2.3)
• Date - date (AFL 1.1)
• DateNum - date number (AFL 1.4)
• DateTime - retrieves encoded date time (AFL 2.3)
• DateTimeConvert - date/time format conversion (AFL 2.90)
• Day - day of month (AFL 1.4)
• DayOfWeek - day of week (AFL 1.4)
• DayOfYear - get ordinal number of day in a year (AFL 2.4)
• DaysSince1900 - get number of days since January 1st, 1900 (AFL 3.20)
• EndValue - value of the array at the end of the selected range (AFL 2.3)
• GetPlaybackDateTime - get bar replay position date/time (AFL 3.0)
• HOUR - get current bar's hour (AFL 2.0)
• INTERVAL - get bar interval (in seconds) (AFL 2.1)
• MINUTE - get current bar's minute (AFL 2.0)
• MONTH - month (AFL 1.4)
• NOW - gets current system date/time (AFL 2.3)
• SECOND - get current bar's second (AFL 2.0)
• TIMENUM - get current bar time (AFL 2.0)
• YEAR - year (AFL 1.4)

Indicators

• AccDist - accumulation/distribution
• ADX - average directional movement index (AFL 1.3)
• ATR - average true range (AFL 1.3)
• BBandBot - bottom bollinger band
• BBandTop - top bollinger band
• CCI - commodity channel index
• Chaikin - chaikin oscillator
• GetCursorMouseButtons - get current state of mouse buttons (AFL 2.80)
• GetCursorXPosition - get current X position of mouse pointer (AFL 2.80)
• GetCursorYPosition - get current Y position of mouse pointer (AFL 2.80)
• MACD - moving average convergence/divergence
• MDI - minus directional movement indicator (-DI) (AFL 1.3)
• MFI - money flow index
• NVI - negative volume index
• OBV - on balance volume
• OSCP - price oscillator
• OSCV - volume oscillator
• PDI - plus directional movement indicator (AFL 1.3)
• PlotText - write text on the chart (AFL 2.80)
• PVI - positive volume index
• RequestTimedRefresh - forces periodical refresh of indicator pane (AFL 2.90)
• RMI - Relative Momentum Index (AFL 2.1)
• ROC - percentage rate of change
• RSI - relative strength index
• RWI - random walk index
• RWIHI - random walk index of highs
• RWILO - random walk index of lows
• SAR - parabolic stop-and-reverse (AFL 1.3)
• SetBarFillColor - set bar/candlestick/cloud chart fill color (AFL 3.1)
• SetChartBkColor - set background color of a chart (AFL 2.80)
• SetChartBkGradientFill - enables background gradient color fill in indicators (AFL 2.90)
• SIGNAL - macd signal line
• STOCHD - stochastic slow %D
• STOCHK - stochastic slow %K
• TRIX - triple exponential smoothed price
• ULTIMATE - ultimate oscillator

Information / Categories

• CategoryAddSymbol - adds a symbol to a category (AFL 2.5)
• CategoryFind - search for category by name (AFL 3.0)
• CategoryGetName - get the name of a category (AFL 2.5)
• CategoryGetSymbols - retrieves comma-separated list of symbols belonging to given category (AFL 2.5)
• CategoryRemoveSymbol - remove a symbol from a category (AFL 2.5)
• FullName - full name of the symbol (AFL 1.1)
• GetCategorySymbols - retrieves comma-separated list of symbols belonging to given category (AFL 2.4)
• GetDatabaseName - retrieves folder name of current database (AFL 2.3)
• GetFnData - get fundamental data (AFL 2.90)
• GROUPID - get group ID/name (AFL 1.8)
• INDUSTRYID - get industry ID / name (AFL 1.8)
• InWatchList - watch list membership test (by ordinal number)
• InWatchListName - watch list membership test (by name) (AFL 3.0)
• IsContinuous - checks 'continuous quotations' flag state (AFL 2.60)
• IsFavorite - check if current symbol belongs to favorites (AFL 2.5)
• IsIndex - check if current symbol is an index (AFL 2.5)
• MARKETID - market ID / name (AFL 1.8)
• NAME - ticker symbol (AFL 1.1)
• SECTORID - get sector ID / name (AFL 1.8)

Lowest/Highest

• HHV - highest high value
• HHVBARS - bars since highest high
• HIGHEST - highest value
• HIGHESTBARS - bars since highest value
• HIGHESTSINCE - highest value since condition met (AFL 1.4)
• HIGHESTSINCEBARS - bars since highest value since condition met (AFL 1.4)
• LLV - lowest low value
• LLVBARS - bars since lowest low
• LOWEST - lowest value
• LOWESTBARS - bars since lowest
• LOWESTSINCE - lowest value since condition met (AFL 1.4)
• LOWESTSINCEBARS - barssince lowest value since condition met (AFL 1.4)

Math functions

• abs - absolute value
• acos - arccosine function
• AlmostEqual - rounding error insensitive comparison (AFL 2.80)
• asin - arcsine function
• atan - arc tan
• atan2 - calculates arctangent of y/x (AFL 2.90)
• ceil - ceil value
• cos - cosine
• cosh - hyperbolic cosine function (AFL 2.80)
• EXP - exponential function
• FLOOR - floor value
• FRAC - fractional part
• INT - integer part
• LOG - natural logarithm
• LOG10 - decimal logarithm
• MAX - maximum value of two numbers / arrays
• MIN - minimum value of two numbers / arrays
• PREC - adjust number of decimal points of floating point number
• ROUND - round number to nearest integer
• sign - returns the sign of the number/array (AFL 2.50)
• SIN - sine function
• sinh - hyperbolic sine function (AFL 2.80)
• SQRT - square root
• tan - tangent function (AFL 1.0)
• tanh - hyperbolic tangent function (AFL 2.80)

Miscellaneous functions

• #include - preprocessor include command (AFL 2.2)
• #include_once - preprocessor include (once) command (AFL 2.70)
• #pragma - sets AFL pre-processor option (AFL 2.4)
• ClipboardGet - retrieves current contents of Windows clipboard (AFL 2.60)
• ClipboardSet - copies the text to the Windows clipboard (AFL 2.6)
• ColorHSB - specify color using Hue-Saturation-Brightness (AFL 2.80)
• ColorRGB - specify color using Red-Green-Blue components (AFL 2.80)
• CreateObject - create COM object (AFL 1.8)
• CreateStaticObject - create static COM object (AFL 1.8)
• EnableScript - enable scripting engine
• EnableTextOutput - enables/disables text output in the Chart Commentary window (AFL 2.2)
• GETEXTRADATA - get extra data from external data source (AFL 1.9)
• GetPerformanceCounter - retrieves the current value of the high-resolution performance counter (AFL 2.90)
• GetRTData - retrieves the real-time data fields (AFL 2.60)
• GetRTDataForeign - retrieves the real-time data fields (for specified symbol) (AFL 2.80)
• GETSCRIPTOBJECT - get access to script COM object (AFL 1.8)
• ISEMPTY - empty value check (AFL 1.5)
• ISFINITE - check if value is not infinite (AFL 2.3)
• ISNAN - checks for NaN (not a number) (AFL 2.3)
• ISNULL - check for Null (empty) value (AFL 2.3)
• ISTRUE - true value (non-empty and non-zero) check (AFL 1.5)
• NoteGet - retrieves the text of the note (AFL 2.6)
• NoteSet - sets text of the note (AFL 2.6)
• NZ - Null (Null/Nan/Infinity) to zero (AFL 2.3)
• PopupWindow - display pop-up window (AFL 3.0)
• PREFS - retrieve preferences settings (AFL 1.4)
• Say - speaks provided text (AFL 2.90)
• SETBARSREQUIRED - set number of previous and future bars needed for script/DLL to properly execute (AFL 2.1)
• StaticVarGet - gets the value of static variable (AFL 2.60)
• StaticVarGetText - gets the value of static variable as string (AFL 2.60)
• StaticVarRemove - remove static variable (AFL 2.80)
• StaticVarSet - sets the value of static variable (AFL 2.60)
• StaticVarSetText - Sets the value of static string variable. (AFL 2.60)
• STATUS - get run-time AFL status information (AFL 1.65)
• STUDY - reference hand-drawn study (AFL 1.5)
• VarGet - gets the value of dynamic variable (AFL 2.60)
• VarGetText - gets the text value of dynamic variable (AFL 2.80)
• VarSet - sets the value of dynamic variable (AFL 2.60)
• VarSetText - sets dynamic variable of string type (AFL 2.80)
• VERSION - get version info (AFL 1.9)
• _TRACE - print text to system debug viewer (AFL 2.4)

Moving averages, summation

• AMA - adaptive moving average (AFL 1.5)
• AMA2 - adaptive moving average (AFL 1.5)
• Cum - cumulative sum
• DEMA - double exponential moving average (AFL 2.0)
• EMA - exponential moving average
• MA - simple moving average
• SUM - sum data over specified number of bars
• TEMA - triple exponential moving average (AFL 2.0)
• WILDERS - Wilder's smoothing (AFL 1.4)
• WMA - weighted moving average (AFL 2.0)

Statistical functions

• Correlation - correlation (AFL 1.4)
• LINEARREG - linear regression end-point (AFL 2.2)
• LINREGINTERCEPT - (AFL 2.2)
• LINREGSLOPE - linear regression slope (AFL 1.4)
• Median - calculate median (middle element) (AFL 2.5)
• mtRandom - Mersene Twister random number generator (AFL 3.0)
• mtRandomA - Mersene Twister random number generator (array version) (AFL 3.0)
• Percentile - calculate percentile (AFL 2.5)
• RANDOM - random number (AFL 1.9)
• STDERR - standard error (AFL 1.4)
• STDEV - standard deviation (AFL 1.4)
• TSF - time series forecast (AFL 2.2)

String manipulation

• Asc - get ASCII code of character (AFL 2.80)
• DateTimeToStr - convert datetime to string (AFL 2.8)
• NumToStr - convert number to string (AFL 2.5)
• printf - Print formatted output to the output window. (AFL 2.5)
• StrExtract - extracts given item (substring) from comma-separated string (AFL 2.4)
• StrFind - find substring in a string (AFL 2.5)
• StrFormat - Write formatted output to the string (AFL 2.5)
• StrLeft - extracts the leftmost part (AFL 2.0)
• StrLen - string length (AFL 1.5)
• StrMid - extracts part of the string (AFL 2.0)
• StrReplace - string replace (AFL 2.90)
• StrRight - extracts the rightmost part of the string (AFL 2.0)
• StrToDateTime - convert string to datetime (AFL 2.80)
• StrToLower - convert to lowercase (AFL 2.80)
• StrToNum - convert string to number (AFL 2.5)
• StrToUpper - convert to uppercase (AFL 2.80)

Trading system toolbox

• AlertIf - trigger alerts (AFL 2.1)
• ApplyStop - apply built-in stop (AFL 1.7)
• BarsSince - bars since
• Cross - crossover check
• EnableRotationalTrading - Turns on rotational-trading mode of the backtester (AFL 2.5)
• Equity - calculate single-symbol equity line (AFL 2.0)
• EXREM - remove excessive signals (AFL 1.5)
• EXREMSPAN - remove excessive signals spanning given number of bars (AFL 2.0)
• FLIP - (AFL 1.5)
• GetBacktesterObject - get the access to backtester object (AFL 2.60)
• GetOption - gets the value of option in automatic analysis settings (AFL 2.60)
• GetTradingInterface - retrieves OLE automation object to automatic trading interfac (AFL 2.70)
• HOLD - hold the alert signal
• IIF - immediate IF function
• LASTVALUE - last value of the array
• OPTIMIZE - define optimization variable (AFL 1.7)
• REF - reference past/future values of the array
• SetBacktestMode - Sets working mode of the backtester (AFL 3.0)
• SetCustomBacktestProc - define custom backtest procedure formula file (AFL 2.70)
• SetFormulaName - set the name of the formula (AFL 2.5)
• SetOption - sets options in automatic analysis settings (AFL 2.3)
• SetPositionSize - set trade size (AFL 2.70)
• SETTRADEDELAYS - allows to control trade delays applied by the backtester (AFL 2.1)
• VALUEWHEN - get value of the array when condition met (AFL 1.1)

Exploration / Indicators

• AddColumn - add numeric exploration column (AFL 1.8)
• AddTextColumn - add text exploration column (AFL 1.8)
• EncodeColor - encodes color for indicator title (AFL 2.2)
• GETCHARTID - get current chart ID (AFL 2.3)
• GetPriceStyle - get current price chart style (AFL 2.70)
• LineArray - generate trend-line array (AFL 2.5)
• PARAM - add user user-definable numeric parameter (AFL 2.3)
• ParamColor - add user user-definable color parameter (AFL 2.3)
• ParamDate - add user user-definable date parameter (AFL 2.60)
• ParamField - creates price field parameter (AFL 2.70)
• ParamList - creates the parameter that consist of the list of choices (AFL 2.70)
• PARAMSTR - add user user-definable string parameter (AFL 2.3)
• ParamStyle - select styles applied to the plot (AFL 2.70)
• ParamTime - add user user-definable time parameter (AFL 2.60)
• ParamToggle - create Yes/No parameter (AFL 2.70)
• ParamTrigger - creates a trigger (button) in the parameter dialog (AFL 2.70)
• PLOT - plot indicator graph (AFL 1.8)
• PLOTGRID - Plot horizontal grid line (AFL 2.3)
• PLOTOHLC - plot custom OHLC chart (AFL 2.2)
• PLOTSHAPES - plots arrows and other shapes (AFL 2.3)
• PLOTVAPOVERLAY - plot Volume-At-Price overlay chart (AFL 2.4)
• SELECTEDVALUE - retrieves value of the array at currently selected date/time point (AFL 2.1)
• SetChartOptions - set/clear/overwrite defaults for chart pane options (AFL 2.70)
• SetSortColumns - sets the columns which will be used for sorting in AA window (AFL 2.90)
• WRITEIF - commentary conditional text output
• WriteVal - write number or value of the array
• _DEFAULT_NAME - retrive default name of the plot (AFL 2.70)
• _N - no text output (AFL 2.1)
• _PARAM_VALUES - retrieve param values string (AFL 2.70)
• _SECTION_BEGIN - section begin marker (AFL 2.70)
• _SECTION_END - section end marker (AFL 2.70)
• _SECTION_NAME - retrieve current section name (AFL 2.70)

File Input/Output functions

• fclose - close a file (AFL 2.5)
• fdelete - deletes a file (AFL 2.70)
• feof - test for end-of-file (AFL 2.5)
• fgets - get a string from a file (AFL 2.5)
• fgetstatus - retrieves file status/properties (AFL 2.90)
• fmkdir - creates (makes) a directory (AFL 2.70)
• fopen - open a file (AFL 2.5)
• fputs - write a string to a file (AFL 2.5)
• frmdir - removes a directory (AFL 2.70)

Low-level graphics

• GfxArc - draw an arc (AFL 3.0)
• GfxChord - draw a chord (AFL 3.0)
• GfxCircle - draw a circle (AFL 3.0)
• GfxDrawText - draw a text (clipped to rectangle) (AFL 3.0)
• GfxEllipse - draw an ellipse (AFL 3.0)
• GfxGradientRect - draw a rectangle with gradient fill (AFL 3.0)
• GfxLineTo - draw a line to specified point (AFL 3.0)
• GfxMoveTo - move graphic cursor to new position (AFL 3.0)
• GfxPie - draw a pie (AFL 3.0)
• GfxPolygon - draw a polygon (AFL 3.0)
• GfxPolyline - draw a polyline (AFL 3.0)
• GfxRectangle - draw a rectangle (AFL 3.0)
• GfxRoundRect - draw a rectangle with rounded corners (AFL 3.0)
• GfxSelectFont - create / select graphic font (AFL 3.0)
• GfxSelectPen - create / select graphic pen (AFL 3.0)
• GfxSelectSolidBrush - create / select graphic brush (AFL 3.0)
• GfxSetBkColor - set graphic background color (AFL 3.0)
• GfxSetBkMode - set graphic background mode (AFL 3.0)
• GfxSetOverlayMode - set low-level graphic overlay mode (AFL 3.0)
• GfxSetPixel - set pixel at specified position to specified color (AFL 3.0)
• GfxSetTextAlign - set text alignment (AFL 3.0)
• GfxSetTextColor - set graphic text color (AFL 3.0)
• GfxTextOut - writes text at the specified location (AFL 3.0)

Referencing other symbol data

• FOREIGN - access foreign security data (AFL 1.5)
• GETBASEINDEX - retrieves symbol of relative strength base index (AFL 2.1)
• PLOTFOREIGN - plot foreign security data (AFL 2.2)
• RELSTRENGTH - comparative relative strength (AFL 1.3)
• RestorePriceArrays - restore price arrays to original symbol (AFL 2.5)
• SetForeign - replace current price arrays with those of foreign security (AFL 2.5)

Time Frame functions

• TimeFrameCompress - compress single array to given time frame (AFL 2.5)
• TimeFrameExpand - expand time frame compressed array (AFL 2.5)
• TimeFrameGetPrice - retrieve O, H, L, C, V values from other time frame (AFL 2.5)
• TimeFrameMode - switch time frame compression mode (AFL 2.80)
• TimeFrameRestore - restores price arrays to original time frame (AFL 2.5)
• TimeFrameSet - switch price arrays to a different time frame (AFL 2.5)