Beginners are the biggest victims of forex signals emanating from all these Telegram channels because many of the beginners do not want to go through the pain of learning so they look for shortcuts.
I will not say that Telegram forex signals do not work, but they have to be followed with common sense and with context.
Nothing is guaranteed in the market so if a signal says place Take Profit at xyz price, it is not cast in Iron, if you see that market dynamics have changed or there is a sudden news release, you should close the trade immediately.
In the end, learning forex and trading for yourself is still the best way, forex signals can be misleading especially for beginners.
If anyone is asking you to buy signals, then chances are he is not a good trader and wants to make money from selling signals instead of trading them. Most good traders give out signals for free without demanding anything in return.