[MQL4 CODE] How to calculate the last long and short order lot size?

/**
 * How to calculate the last long and short order lot size?
 */
double LastBuyLots; 
double LastSellLots; 
int MagicNumber=1111;
void Calculate_Last_Order_Lot_Size()
{
   for(int cnt=OrdersTotal()-1;cnt>=0;cnt--){ 
      OrderSelect(cnt,SELECT_BY_POS,MODE_TRADES); 
      if(OrderSymbol()!=Symbol()||OrderMagicNumber()!=MagicNumber)continue; 
      if(OrderSymbol()==Symbol()&&OrderMagicNumber()==MagicNumber) 
      if(OrderType()==OP_BUY) 
      { 
         LastBuyLots=OrderLots(); 
         break; 
      } 
      if(OrderSymbol()==Symbol()&&OrderMagicNumber()==MagicNumber) 
      if(OrderType()==OP_SELL) 
      { 
      LastSellLots=OrderLots(); 
      break; 
      } 
   }
}
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