how to backtest data in MT4?

 
I download the data in MT4 but i am unable to to back test it. please someone teach me how to back test data...
 

There are no mind readers here. "Unable to to back test" does not say anything.

Compile it, select the EA in the Expert Advisor field. Select time frame. Select Visual Mode. Start.

 
perpetuity:
I download the data in MT4 but i am unable to to back test it. please someone teach me how to back test data...
Read the help that comes with MT4 first.