A few days ago I joined a group and they told me they would signal me to trade. And what a regular signal they gave but I did not get good results from their signal. I had a good amount of profit when I traded with my darna before I joined their group.
As a rule, such signals seem accurate, but only until you try to put them into practice. But I can assume that after you stop following the signals, you see that some signal is really triggered by 100%, thereby compensating for previous unprofitable trades.
The signals that are provided on these groups are for the benefit of group admins and some other insider people who decide which coin to pump, it's just a pump and dump scheme on most of the groups. They buy the coin first in small amounts and accumulate the coins over many days, once they have reached the threshold then they push the signal of that coin to buy and once the price goes up when people buy the coin then they dump their bags on the late comers and earn profits.