EW theory. Is that Elliot wave? Does that really work? I have tried using it a few times but it is so subjective
Elliot Wave, Wolfe Wave, Gann Theory, Fractals, etc...
These are just tools.
It's up to the trader to determine if they actually work appropriately for their specific trading strategy.
If it looks too good to be true, it's probably a scam! Let the buyer beware.