the barriere 1800-2000 Elo

I don't understand why i have 2452 Elo in tactic training (in chess.com) but i still arround 1800-1900 Elo in 10 min(blitz) and 1700 Elo in 15 or 20 min why ????

I'm asking myself the same question. Can't understand what the "tactics" score relates to.

I want to say that i work hardly in tactic but that not improve my chess !!!!!

It's a conspiracy.

They want to undermine your confidence and keep you down!

All a tactics rating says about you is how well you find a tactic when you know one is there. Finding a tactic in a game is completely different. Plus there are in fact other aspects to chess besides tactics. Positional understanding, endgames, etc.

yes i know that "ErikWQ ".i work on these aspects.

Maybe because chess isn't 99% tactics? That and because TT's rating does not correlate with your chess rating? If you are presistent enough getting a high TT rating is unavoidable.