在指标里怎么MessageBox显示不出来，是不是在指标里这个函数不能用！？！？谢谢！

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在指标里怎么MessageBox显示不出来，是不是在指标里这个函数不能用！？！？谢谢！

[Rashid Umarov]

See https://docs.mql4.com/common/MessageBox

The function cannot be called from custom indicators since they are executed within interface thread and may not decelerate it.