请问， SubscribeBar("ag999.SHFE","1h",20200101);订阅失败什么原因
请问， SubscribeBar("ag999.SHFE","1h",20200101);订阅失败什么原因， SubscribeBar("ag000.SHFE","1h",20200101);订阅就能成功
请问， SubscribeBar("ag999.SHFE","1h",20200101);订阅失败什么原因， SubscribeBar("ag000.SHFE","1h",20200101);订阅就能成功
后缀不对 以后不知道合约名可以用symbol输出看一下 像这样