Every company's history data are coming from MetaQuotes, but why are they all different?

 
Each Broker has different Customers, the Customers Buy and Sell and collectively influence the price for that Broker . . .
 
zbleach:
a same EA performs entirely different on history test at different mt4 platforms.

MetaQuotes, as I discovered has several data servers from different countries, and different brokers connect to different ones.

So thats why the history is different. You need to check with them, which one are connecting to.


Reason: