algorithmmql4metatrader4mt4

How to group a lot exponent in MQL4 / MT4?

I manage to get normal lot exponent but I need to change it a bit by grouping example in the picture. Can someone guide me how to get the lot exponent but with a grouping technique Group=5 Exponent=1.8?

double GroupExponent(int type)
{
   double lot=0,exponent=1.8,group=5,initialLot=0.01;
   if(type==OP_SELL)                         
   .............                            //<---- Do i need to loop this area ?
      lot= initialLot * MathPow(exponent,TotalSell());   
   return lot;
}

int TotalSell()
{
   int Sell=0;
   for(int trade=OrdersTotal()-1; trade>=0; trade--)
   {
      if(!OrderSelect(trade,SELECT_BY_POS,MODE_TRADES))continue;
      if(OrderSymbol()==Symbol() && OrderType()==OP_SELL))
         Sell++;
   }
   return Sell;
}

enter image description here

Solution

  • No, you don't need a cycle. You can attain your layer system like this:

    double GroupExponent(int type)
{
   double lot=0,exponent=1.8,initialLot=0.01;
   int group = 5;
   if(type==OP_SELL)                         
   {
      lot = NormalizeDouble(initialLot * MathPow(exponent, (TotalSell() - 1) / group), 2);
   }
   return lot;
}

int TotalSell()
{
   int Sell=0;
   for(int trade=OrdersTotal()-1; trade>=0; trade--)
   {
      if(!OrderSelect(trade,SELECT_BY_POS,MODE_TRADES))continue;
      if(OrderSymbol()==Symbol() && OrderType()==OP_SELL))
         Sell++;
   }
   return Sell;
}

    Note: This will work as intended only if Layer == 1 equals TotalSell() == 1. If Layer == 1 equals TotalSell() == 0, then there is no need to subtract 1 from TotalSell() inside MathPow().