You are in a forum that is a source for good quality discussions, so why do you want to search for a channel on Telegram? A lot of channels want to make profits, and thus you will find many people who talk to make their channels look great.
To be fair, while we get decent threads on the Trading Discussion section from time to time, it's mostly those "what coin to buy" and basic beginner trading question threads, not technical analysis posts(which I think is that OP is looking for).