Any trading system will give you a certain "advantage", which is a favorable bias for you. It is something that is more likely to happen than not to happen. And this system is what you must find.
At present, there are indeed some trading systems that are better than others, but please do not become obsessed with finding the perfect system - the so-called trader's nirvana, the elusive Holy Grail, and the system that never makes mistakes. We tend to find a trading system that we enjoy, feel comfortable with, and understand, and persist in using it to maintain consistency.
We must keep an eye on the big picture and realize that the current transaction is just one of many. In this way, the current transaction is insignificant, just like a piece of plankton in the vast ocean. The whole of trading is managing risk and surrendering to the oldest rule in the universe, which is the ancient probability rule.