I know nobody can be sure at nithing 100%, but good traders must have more than 51% ROI to trade positive, and I want to know where and how I can discover this signals for good trading
Maybe you can check 3Commas.io then:
https://3commas.io/It offers both signals and the ability to copy either bots or other traders. The service is not free though, not if you want to take advantage of all their features anyway.