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2% account risk per trade code

  • #1
  • First Post: Oct 15, 2012 1:09am Oct 15, 2012 1:09am
Hi,

I'm looking for some code to add to my expert. I need the expert to calculate the stoploss in pip from the orderopenprice() to the 30ema and then calculate how many lots to use that is 2% of the available account equity.

in other words:

$1000 Account Equity
2% = $20
pips from MA to current price = 55pips
Lots = 0.3

If anyone can give some idea here it would be nice.

Jannie
  • #2
  • Oct 15, 2012 1:29am Oct 15, 2012 1:29am
You can use this :
Inserted Code
//+----------------------------------------------------------------------+
//|  Function: Calculate Lot Size by RiskPercent 1=1% , 0.1 = 0.1 %      |
//+-----------------------------------------------------------------------------+
double CalculateLotSize(double RiskPercent,double FreeMargin, double price1, double price2) {
    //Calculate the lot size by risk.
    if (price1 == 0 || price2 == 0) return(LotSize);//Just in case
    if (FreeMargin == 0) FreeMargin = AccountFreeMargin();
    double TickValue = MarketInfo(Symbol(),MODE_TICKVALUE) ;
    double LotStep = MarketInfo(Symbol(),MODE_LOTSTEP);

    double SLPts = MathAbs(price1 - price2);
    SLPts/= Point;

    double Exposure = SLPts * TickValue; // Exposure based on 1 full lot

    double AllowedExposure = (FreeMargin * RiskPercent) / 100;

    int TotalSteps = ((AllowedExposure / Exposure) / LotStep);
    double LotSize = TotalSteps * LotStep;

    double MinLots = MarketInfo(Symbol(), MODE_MINLOT);
    double MaxLots = MarketInfo(Symbol(), MODE_MAXLOT);

    if (LotSize < MinLots) {LotSize = MinLots; /*Alert("Min/Max-Lotsize overruled");*/}
    if (LotSize > MaxLots) {LotSize = MaxLots; /*Alert("Min/Max-Lotsize overruled");*/}
    return(LotSize);

}  //------------END FUNCTION-------------//
  • #3
  • Oct 15, 2012 1:44am Oct 15, 2012 1:44am
Hi, Thanx for the code, could you explain in short how i would use this?
  • #4
  • Last Post: Oct 15, 2012 2:32am Oct 15, 2012 2:32am
Quoting janniekotze
Hi, Thanx for the code, could you explain in short how i would use this?
The code is self-explaining.
I think you should read the documentation of mql first before you start coding and learn what a function is and how to use functions.
Look here: http://book.mql4.com/
and here: http://docs.mql4.com/
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