switch (string) ???

double stop(string mode)
   {
   double stop;
   switch(mode)
      {
      case "buy":
         stop=price("buy")-stopLoss*Point;
         break;
      case "sell":
         stop=price("sell")+stopLoss*Point;
         break;
      case "modifyBuy":
         stop=Bid-stopLoss*Point;
         break;
      case "modifySell":
         stop=Ask+stopLoss*Point;
         break;
      default:
         Print("Stop: invalid argument.");
	 return(-1);
         break;
      }
   return(stop);
   }