Hey all,
Before asking my question, I'm French so please excuse me if I make some grammatical errors but I will do my best.
I would like to know if there is a way to simulate the recurrent addition of a certain amount to the current capital.
What I would like to do concretely is to add $1000 every months because that what I plan to do when I will invest using my formula.
So is modifying the current capital is possible in AFL ? 
PS: I would like to thanks the AmiBroker creator and the development team, I think it's the best investment I've ever made 
It is already there in AmiBroker manual see Examples 1 and 2:
/// Example 2: dollar-cost averaging (simplified formula because AB treats first sigScaleIn as buy anyway)
/// modified from:
/// @link https://www.amibroker.com/guide/h_pyramid.html
FixedDollarAmount = 1000;
SetPositionSize(FixedDollarAmount, spsValue);
MonthBegin = Month() != Ref( Month(), -1 );
Buy = IIf( MonthBegin, sigScaleIn, 0 ); // each month increase position
Sell = 0; // we do not sell
Thanks for your reply but I don't want to increase the position size, just the capital amount.
I'm opening a maximum of 20 positions with a size of 5% so I want to add $1 000 every months so the future positions that will be opened be bigger.
You can do that by adding $1000 to bo.cash each month from inside a mid-level CBT. Just be aware that approach will change some metrics, like CAR.
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@cryptolowkey, So you want to add value to available cash every month?
That will require use of CBT
https://www.amibroker.com/guide/a_custombacktest.html
SetCustomBacktestProc("");
if (Status("action") == actionPortfolio) {
bo = GetBacktesterObject();
bo.PreProcess();
new_month = Month() != Ref(Month(), -1);
for (i = 0; i < BarCount; i++) {
bo.ProcessTradeSignals( i );
if ( new_month[ i ] )
bo.Cash += 1000;// add some amount to cash every start of month
}
bo.PostProcess();
}
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