How To Calculate Position Prices of Multiple Orders ?

double PriceAverage() 
{ 
   double PriceSum=0;
   int count=0;
   for (int i=0; i<OrdersTotal(); i++) 
      { 
         if (OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) 
         if((OrderSymbol()==Symbol()) ) 
            {
              if(OrderType()==OP_BUY || OrderType()==OP_SELL) PriceSum+=OrderOpenPrice();
              count++;
                        
            }
      } 
   if(PriceSum<1) return(0); 
   
   return(NormalizeDouble(PriceSum/count,Digits)); 
}

int start()
  {
Print(Symbol()+"= "+PriceAverage()); 
}