There is no 100% correct signal mostly they are not accurate according to my experience as I tried to join before a paid signal in telegram yeah you can easily get an idea from this signal but you need to validate it yourself if this is really possible, for I now I only trust one where I can get really good signal as he is using Elliot wave analysis so far looks like 80% accurate, You can pm me if you are interested to join as of now Im only using limited and free signal from him.
I could assume that 80% accurate is really good enough to make a good trade. But wondering why many traders had failed even though they are joining these signals. This means that all of these signals are not giving any assurance, not even if it was said it is 80% accurate because that 20% left is huge enough to affect the results.
That is why I don't trust signals, not only because they are meant to fail but also because these signals can lead you to lose.