Depending on the signal provider, some trading signals seem reliable, while most are actually not. The risk of using trading signals solely depends on the individual. I think analyzing the market yourself is the best, so, as to differentiate between good and bad signals.
Yes, it can be a sort of but we can't just rely on it. If we are aiming to succeed and become an expert trader, we have to build our own backyard, put extra effort to find strategies that we could use in our daily trade and not just keeping those signals that even it is coming from reliable source. Cause anything we do will also reflect us. Having those signals won't give us an assurance that could give us a long-term effectivity.