MT4 Back testing results difference

 

Deal all, 


I need your help!


I am testing one of my experts on two MT4 terminals using tick data 99.9% accuracy at the same time , by the same setting, on the same broker.


But the results I am getting are different! If you saw the results you would think that they are different experts!


I tried back testing using two different brokers terminals, while using tick data, but the results are different as well.


Any explanation about this issue? Ways to solve it?

Reason: