Different Tester Results on different Computers Same EA why?

 

I Developed an EA that i use to trade on a live account installed on my desktop where tests and Code were done, but i decided to let my EA run on my Laptop while i trade on a different account on my desktop.  When i ran the EA on the tester on my Laptop the test results were completely different and do not even match the live results i have.  Any idea why?

 

--The desktop Tester and live results are positive while the laptop tester results are horribly negative.

 
This question has been discussed thousands times. Please do some researches.
Reason: