If we cannot backtest it and find out if it is reliable or not, a lot of us are just objectively believing it works. Any prove for Elliott Wave work? Personally I have learn how it works and tries to apply it everyday. It "looks" like it works sometimes, but after years of experience, it seem like it is more about my objectively thinks it is a raise/drop trend instead of a real subjective analysis. We have to "choose" if the current trend possible pattern, then the upper time frame bigger wave pattern, and even think about the smaller time frame wave pattern, and all of these are subjective choices in our mind every time when we try to do a Elliott Wave analysis. Then we just see what we want to see, and then we invest by what we feel like and believe.