好消息:MQL5支持超过8根曲线的指标了

 
帮助文件里是这么说的:
Custom indicators properties
The number of indicator buffers that can be used in the user's display is not limited. But each array, which is designated as the indicator buffer using the function SetIndexBuffer(), Must specify the type of data that it will store. This may be one of the values of the transfer ENUM_INDEXBUFFER_TYPE.
试过了,确实支持。