Synchronous chart MQL4 // 联动图表

Specific implementation content   //  具体实施内容

My MT4 software loaded EURUSD chart of four different templates A, B, C, D. When A chart is switched to GBPUSD, B,C,D chart is switched to GBPUSD at the same time  

//我的MT4软件加载了A，B，C，D四种不同模板的EURUSD图表，当A图表切换到GBPUSD，BCD图表同时切换到GBPUSD

Claim //要求

1,  MQL4 source code    //   1，MQL4源代码

2, as simple as possible, take up the least memory  // 2，尽可能简单，占用最少的内存

3,Not just four charts, maybe more charts showing simultaneously //  不只是四个图表，可能同时显示更多图表