I don't recommend to use any trading signals free or not . If you wanna become a good trader you need to learn your personal signals and strategy , if you will be listen some signals you will need buy on signals , sell on signals and always hearing different people , by this way you will never learn how to trade and will not understand market at all.
What's the point in being a good trader if you will only rely on crypto signals that also does not have certain or 100% chance success on trading. They are only using you guys especially newbies who don't know a thing about it they will use your money to cover their mistakes on a coin or token and invite you to invest on that coin.