False positive in Template Matching

Oh, I am considering a good match everything that is over 0.92.

What I am doing is:

1- Compute template matching between source and template
2- Get MaxVal and MaxLoc from the resulting image (I am getting values between -1 and 1)
3- If MaxVal > 0.95, then I have a match.

How should I determine what’s a good score and what isn’t?