Knowledge Base

AmiBroker 4.91.0 BETA introduced the following new keywords:

switch, case, break, continue, default

You have to make sure that your formulas do not use them as variable names. The above words are now reserved AFL keywords and if you use them for your own variables you need to replace this identifiers with names that do not conflict with the reserved keywords.

This article shows how to perform multiple-file text replace very quickly. (more…)

Filed by Tomasz Janeczko at 5:27 am under AFL
8 Comments

To create a spread chart (and other multi-security indicators / statistics etc.) one can use FOREIGN function which allows to refer to other symbols than currently selected:

It’s necessary to do the following:
- Analysis -> Formula Editor
- enter the formula:

spread = Foreign( "ticker1", "C") - Foreign( "ticker2", "C");
Plot( spread, "spread", colorRed); 


- Tools -> Apply Indicator
(replace ticker1, ticker2 with actual symbol names)

Filed by support at 7:58 am under AFL, Indicators
1 Comment

In this short article we will show how to calculate and plot trailing stop using two different methods. (more…)

Filed by support at 11:06 am under Indicators, Systems
8 Comments

This example shows how to fill the area between Bollinger Bands with a solid color. (more…)

Filed by support at 9:01 pm under AFL, Indicators
4 Comments

Someone asked me recently how to count calendar days (not bars) that passed since first available quote. Here is a sample formula that shows how to do that. (more…)

Filed by Tomasz Janeczko at 3:15 pm under AFL, Indicators
5 Comments

If we are backtesting the intraday strategy and we do not want to keep open positions overnight – then it’s necessary to force closing all the open positions before the session end. In order to code it in AFL – the easiest is to use TimeNum() function for that purpose. (more…)

Filed by support at 5:19 am under AFL, Systems
No Comments

The following code shows how to use separate trading rules for several symbols included in the same backtest. (more…)

Filed by support at 6:55 am under AFL, Systems
No Comments

The order stops are triggered in the backtest is the following:
 - Fixed Ruin stop (loosing 99.96% of the starting capital)
 - Max. loss stop
 - Profit target stop
 - Trailing stop
 - N-bar stop* (see below)

In versions 4.61 and higher: you can decide if N-BAR stop has the lowest or the highest priority. (more…)

Filed by support at 6:48 am under AFL, Systems
No Comments

In order to automatically change a property for many symbols – instead of manual action in Symbol -> Information dialog one can use OLE automation.
For example – to unmark “Use only local database” option for all the symbols, it’s enough to run such SCAN: (more…)

Filed by support at 10:03 am under AFL
3 Comments

If one wants to display a Candlesticks in one chart pane and Bars in another one, then it’s necessary to use a formula which does not read the settings from: View -> Price Chart Style.

The following custom Price formula allows to achieve this: (more…)

Filed by support at 9:54 am under AFL, Indicators
No Comments