groups like that you will even find many telegram channels. they just make signals whose accuracy cannot be confirmed. We also can't know whether those who give signals are really experienced people in trading or not.
anyway, why do they share signals? want to try to bankrupt exchanges with their successful trades that many group members are participating in?
Even those who create paid channels for trading signals cannot be trusted for their accuracy. especially those who distribute signals for free. one day you will understand that you may be being led into their trap.