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LotsRisk - library for MetaTrader 4

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votes: 8
2008.11.18 09:22
2016.04.05 14:49
LotsRisk.mqh (1.63 KB)view


  • riskPercent - percent of the current balance you want to risk
  • sl - the value of the StopLoss for the given order
  • price - the open price of the order
  • error - refereced parameter. an error code, that is returned by the function

Note: I can't say that it works correctly. I've checked it approximately. So your comments are appreciated.

Here is an example:

   int riskPercentage = 3,
   double sl = Ask - 40 * Point,
      openPrice = Ask;   

   double lots = GetNeccessaryLotsWithRisk(riskPercentage, sl, openPrice, error);
   if (CompareDoubles(lots, 0))
      switch (error)
         case LOTS_TOO_BIG:   // lots are bigger than max lots
            Alert("Risk percentage is too big");

         case LOTS_TOO_SMALL: // lots are smaller than min lots
            Alert("Risk percentage is too small");

         default:             // formula's result =)
            Alert("It seems like you've got $0 or stoploss is too far");

Translated from Russian by MetaQuotes Software Corp.
Original code:

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