some take on closing the trade I recommend these people which have take fee after trade close with profit because in this deal we are safe from scammers because they didn't take money in advance they give you a good signal after completions of trade they will take some percentage in your profit.
Signal groups don't offer that option to their members, they don't allow anyone to first join the group, use the signals, and then give money if they get profit because they know that their signals are not always going to work and they will barely get anything in that case. So they take money upfront for joining the group and they barely care about you profiting from their signals or not and there is nothing one can do about that since the money is already gone and you can't write messages in the group and they can easily block you from private messages.
That's why, it's much better for someone to learn the things and make their trades themselves after doing some research and analyzing the market instead of relying on such groups and their signals because they are not always right with their signals and you won't earn as much as they make it look like you will.