I just read thread " How Sensitivity Works " and it helped a lot but i have a question . How i really know which is the perfect pixel / degree for me ? How i find it , is there anywhere a program or meter? Please answer me because i have a lot of issues with my gaming mouse recently and it pisses me off . Thanks in advance . Sorry for my bad english by the way ! 

Edited June 6, 201511 yr by therealsensitivity

That thread simply says you should use higher dpi and lower sensitivity (as opposed to lower dpi and higher ingame sensitivity). Going too low sensitivity in game can cause problems, though.

I just read thread " How Sensitivity Works " and it helped a lot but i have a question . How i really know which is the perfect pixel / degree for me ? How i find it , is there anywhere a program or meter? Please answer me because i have a lot of issues with my gaming mouse recently and it pisses me off . Thanks in advance . Sorry for my bad english by the way ! 

There is no magic formula for this unfortunately, but I plan to add an update that guides you a little bit.