bool  SymbolIsSynchronized(
   string  name,       // 交易品种名称
   );

#define SYMBOL_NAME "EURUSD"

//+------------------------------------------------------------------+
//| EA交易初始化函数                                                   |
//+------------------------------------------------------------------+
void OnStart()
  {
//--- 使用“SYMBOL_NAME”交易品种获取用于同步程序端数据和服务器数据的标识
   bool   sync = SymbolIsSynchronized(SYMBOL_NAME);

//--- 根据同步标识创建消息
   string text = StringFormat("The data on the '%s' symbol in the terminal is synchronized with the data on the trading server.", SYMBOL_NAME);
   if(!sync)
      text = StringFormat("The data for the '%s' symbol in the terminal is not synchronized with the data on the trading server.", SYMBOL_NAME);

//--- 将获得的结果发送到日志
   Print(text);

   /*
   result for synchronized data:
   The data on the 'EURUSD' symbol in the terminal is synchronized with the data on the trading server.

   result for data not yet synchronized:
   The data for the 'GBPHKD' symbol in the terminal is not synchronized with the data on the trading server.
   */
  }