How to find highest and lowest open price orders?

Provided that your order magic number is stored in a variable myMagic, the code is as follows (havent tried compiling):

void printMyOrders() {
   int highestBuyPos=-1, lowestSellPos=-1;
   double highestBuyPrice=0.0, lowestSellPrice=1000000.0;

   for(int i=0; i < OrdersTotal(); i++){
      if(!OrderSelect(i, SELECT_BY_POS, MODE_TRADES)) {
         return ;
      }
      
      if(OrderSymbol()==Symbol()) {
         if(OrderMagicNumber()==myMagic) {
            if(OrderType() == OP_BUY) {
               if(highestBuyPrice < OrderOpenPrice()) {
                  highestBuyPrice = OrderOpenPrice();
                  highestBuyPos = i;
               }
            }
            else if(OrderType() == OP_SELL) {
               if(lowestSellPrice > OrderOpenPrice()) {
                  lowestSellPrice = OrderOpenPrice();
                  lowestSellPos = i;
               }              
            }
         }
      }
   }

   if(!OrderSelect(highestBuyPos, SELECT_BY_POS, MODE_TRADES)) {
      Alert("Failed selecting highest buy order!");
   }
   else {
      OrderPrint();
   }

   if(!OrderSelect(lowestSellPos, SELECT_BY_POS, MODE_TRADES)) {
      Alert("Failed selecting lowest sell order!");
   }
   else {
      OrderPrint();
   }
}