how to exchange variables between MT4's Indicators and EAs?

 
Hi guys,

Can I exchange variables between my MT4 programs? Between different Indicators and even between EA and Indicators?

If I can (which would be very much useful, of curse), how can I do it?

Thanks a lot,
 
 
Thanks Rosh,
GlobalVariableSet( string name, double value)
and as far I can see, I can just set Global variables as double variables, right? I would not be able to set a globalvariable as a Arrays, right?

Thanks a lot,