Please help me "OrderSend: Error code 131"

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I get this error on validation my product but it is running well on backtests.

Please help me!



    
double GetLotSize()

    
{

    
   double minlot    = MarketInfo(Symbol(), MODE_MINLOT);

    
   double maxlot    = MarketInfo(Symbol(), MODE_MAXLOT);

    
   double leverage  = AccountLeverage();

    
   double lotsize   = MarketInfo(Symbol(), MODE_LOTSIZE);

    
   double stoplevel = MarketInfo(Symbol(), MODE_STOPLEVEL);

    
   double MinLots = 0.01; 

    
   double MaximalLots = 50.0;

    
   double lots = Lots;

    



    
   if(MM)

    
   {

    
      lots = NormalizeDouble(AccountFreeMargin() * Risk/100 / 1000.0, LotDigits);

    
      if(lots < minlot) lots = minlot;

    
      if (lots > MaximalLots) lots = MaximalLots;

    
      if (AccountFreeMargin() < Ask * lots * lotsize / leverage) 

    
      {

    
         Print("We have no money. Lots = ", lots, " , Free Margin = ", AccountFreeMargin());

    
         Comment("We have no money. Lots = ", lots, " , Free Margin = ", AccountFreeMargin());

    
      }

    
   }

    
   else lots=NormalizeDouble(Lots, Digits);

    
   return(lots);

    
}



    

        
  

Testing trading strategies on real ticks
Testing trading strategies on real ticks
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The article provides the results of testing a simple trading strategy in three modes: "1 minute OHLC", "Every tick" and "Every tick based on real ticks" using actual historical data.
 
Tran Thanh Tuyen:

I get this error on validation my product but it is running well on backtests.

Please help me!


double GetLotSize()
{
   double minlot    = MarketInfo(Symbol(), MODE_MINLOT);
   double maxlot    = MarketInfo(Symbol(), MODE_MAXLOT);
   double leverage  = AccountLeverage();
   double lotsize   = MarketInfo(Symbol(), MODE_LOTSIZE);
   double stoplevel = MarketInfo(Symbol(), MODE_STOPLEVEL);
   double MinLots = 0.01; 
   double MaximalLots = 50.0;
   double lots = Lots;

   if(MM)
   {
      lots = NormalizeDouble(AccountFreeMargin() * Risk/100 / 1000.0, LotDigits);
      if(lots < minlot) lots = minlot;
      if (lots > MaximalLots) lots = MaximalLots;
      if (AccountFreeMargin() < Ask * lots * lotsize / leverage) 
      {
         Print("We have no money. Lots = ", lots, " , Free Margin = ", AccountFreeMargin());
         Comment("We have no money. Lots = ", lots, " , Free Margin = ", AccountFreeMargin());
      }
   }
   else lots=NormalizeDouble(Lots, Digits);
   return(lots);
}
 
Tran Thanh Tuyen:
 else lots=NormalizeDouble(Lots, Digits);

Why do you nornalize Lots to Digits?

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