string  SymbolName(
   int   pos,          // number in the list
   bool  selected      // true - only symbols in MarketWatch
   );

#define SYMBOL_NAME "GBPHKD"

//+------------------------------------------------------------------+
//| Script program start function                                    |
//+------------------------------------------------------------------+
void OnStart()
  {
//--- set the flag of the server symbol search result
   bool found = false;

//--- find the 'SYMBOL_NAME' symbol in the list of all server symbols
   int total = SymbolsTotal(false);
   for(int i=0; i<total; i++)
     {
      //--- get a symbol name in the list by loop index
      string name = SymbolName(i, false);

      //--- if this is the desired symbol, send its name and position in the list to the journal and exit the loop
      if(name == SYMBOL_NAME)
        {
         PrintFormat("The '%s' symbol was found in the list of server symbols at index %d", name, i);
         found = true;
         break;
        }
     }

//--- if a symbol is not found on the server, report this before shutting down
   if(!found)
      PrintFormat("The '%s' symbol was not found on the server.", SYMBOL_NAME);
  }