Trading based on this signals is a bad idea.
Most of this groups are no experts at all but copy/paste of other, I assume connected groups.
What they do is pump and dump the coin. By the time you get the signal the coin is already pumped. And if you still buy it, in a belief you don't want to miss out on the opportunity, you end up selling in red or you're stuck with some shitcoin you won't be able to sell in profit for ages.