Dynamic Crtical Strike indicator Add-On?

is there an add-on that displays the current Critical Strike percentage ...
preferable in a readable-size (re-positionable) box with just a percentage number?
i have searched the web for such a thing and could not find it...

Any help appreciated.

I didn't find the right solution from the Internet.

reference:
us.battle.net/forums/en/wow/topic/20762057906
Web Video Cost

Thanks!