You can search for it in the telegram search menu to find telegram signal groups, but you might find it difficult to find them because each group you find will claim that their group is the best. Also, as far as I know, signal groups like that require a subscription fee to get lots of signals from them. But it doesn't guarantee you can get trading signals. So I advise you to learn about trading so that you don't depend on other people's signals and can trade freely.