Its pretty easy to tell when a JL is fishing for an H+K, you'll either have a life lead or be in a really open space, you'll mostly see it after jab stuns or lift stuns, also, remember these 2 tips, 9K IS guaranteed after H+K, if you see a JL using that instead of a bs CB, he's legit, and the second one, H+K is a sitdown stun, so its free advantage, an H+K > DG is completely viable.