There wouldn't be a way to do it easily automatically with any software I'm aware of. You'd have to do it somewhat by hand. A big reason is that sometimes hands with more equity can be folds over hands with lower equity simply because the hands with lower equity are drawing to the nuts.

I'd suggest the following:

1. Construct a range for villain preflop
2. If looking @ flop ranges, then use blocker effect of flop cards to narrow villain's range
3. If villain acted then narrow his range further accordingly
4. When facing a bet/raise determine the MDF and multiple this % by the total number of combinations
5. Determine through logic and equity vs. range calculations which hands would be best to defend and add them up until reaching the MDF.

Please note that MDF fails in some areas, though this is a reasonable exercise to determine how much you are defending vs. raises/bets.

Thanks a lot for your answer.
Yeah I agree I could do like this but the point being to do it fast, that's not a option that provide my needs.

Thing is, it should not be hard to develop such a feature in a software, and I still can't believe there's no way to do it easily. For example when you plot the equity of a range vs range on a board (I know we can do that with few softwares), you have what I need. You can see the top 50% of a range. And I would like to extract this range.
That has to be possible with crev imo. Like having a condition "Call with top 50%". Or maybe it's possible with the equity ? Like "call with 33%+ equity" ?