Levels color correction node for material editor

Hello.
For last couple of hours I have been looking for a tool I do really miss so much in 3Ds max - Levels color correction node for material editor - it just doesnt exist! Or does it? And it would be so so great to have as doing Levels stuff trough 3ds max Output node (curve) is just really pain because of navigation and lack of information preview.
Levels aka photoshop levels like.
Would be great if you can suggest something.

Thank you so much guys :)

Jakub