Subscribe to a signal with mt4

 
Hello,

I have some big problems subscribing to a mt4 signal with Ubuntu GNU/Linux. I had succcess a month ago but now not. In fact, it would be so great if we could subscribe directly via mql5.
Without a Windows system it's rather difficult to install a working mt4. And via the Android app it is not possible to subscribe to any signal. 

Any help would be great. 
Thanks.

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