How to make my strategy trade a percentage of account equity instead of fixed co

• 10/16/2025 at 5:05 AM #252652
  SQUARED2

  Hi everyone,

  I’m trying to adjust my strategy so that it trades a percentage of my account equity instead of using a fixed number of contracts.

  Ideally, I’d like the strategy to automatically calculate position size based on my current equity — for example, allocate 2% of the account equity per trade. That way, the position size scales up as the account grows, and decreases after losses.

  Has anyone implemented this before in ProBuilder code?
  I’d really appreciate an example or some guidance on how to calculate and set the position size dynamically.

  Thanks a lot in advance!
  /Osca

  

  SQUARED2

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  10/16/2025 at 7:19 AM #252653
  PeterSt

  Hi Osca,

  It is not possible to obtain your portfolio amount by means of ProBuilder.
  It *is* of course possible to enter that amount yourself as a parameter to the program code. But you would need change the parameter in/to the code and  restart that strategy code  in ProOrder to let the latest value come through.

  In other words : what you functionally want is not possible.

  

  PeterSt

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  10/16/2025 at 3:56 PM #252676
  robertogozzi

  What PeterSt said is correct.

  But, since when you start a strategy you for sure KNOW how much of your balance is assigned to that strategy, simply code that value in your code and add to it the STRATEGYPROFIT, then you have to calculate thge risk for the trade and divide the result by the price to determine the number of contracts:

  ONCE myCapital = 20000 ONCE myRisk = 2 //2% myEquity = myCapital + StrategyProfit tempRisk = myEquity * myRisk / 100 LotSize = tempRisk * 100 / close myLongConditions = Not OnMarket AND close CROSSES OVER average[20,0](close) myShortConditions = Not OnMarket AND close CROSSES UNDER average[20,0](close) IF myLongConditions THEN BUY LotSize Contracts at Market ELSIF myLongConditions THEN BUY LotSize Contracts at Market ENDIF SET STOP %LOSS 0.5 //0.5% SET TARGET %PROFIT 1 //1% graph myEquity graph tempRisk

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  ONCE myCapital    = 20000 ONCE myRisk       = 2            //2% myEquity          = myCapital + StrategyProfit tempRisk          = myEquity * myRisk / 100 LotSize           = tempRisk * 100 / close myLongConditions  = Not OnMarket AND close CROSSES OVER  average[20,0](close) myShortConditions = Not OnMarket AND close CROSSES UNDER average[20,0](close) IF myLongConditions THEN    BUY LotSize Contracts at Market ELSIF myLongConditions THEN    BUY LotSize Contracts at Market ENDIF SET STOP   %LOSS   0.5    //0.5% SET TARGET %PROFIT 1      //1% graph myEquity graph tempRisk

  

  robertogozzi

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