from what i've seen so far, nobody here has studied harmonic patterns in depth, and the best argument for why it's snake oil is because it seems like bullshit.
but I can understand. In Carney's book, he only really go over successful trades and examples. there's no discussion on psychology, sizing, r/r, failed patterns, or losing trades. All it has is perfect chart patterns, when in reality, market rarely gives you perfect patterns.
on the other hand. I've heard Carney's name come up in podcasts and I've heard him talk. I've not picked up any red flags that he's some kind of predatory course salesman, and people seem to talk about him in a positive light.
and any good trader knows trading stats are a function of the trader's execution, not native to the patterns themselves. there are a wide variety of ways to trade harmonics, just like there are a wide variety of ways to trade classical patterns. you can't say something has no edge just because there is no stats to back it up, unless you're talking about completely automated, systematic trading strategy, which is not the topic of this discussion.
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so let's change the angle of the topic a little bit. Has anyone actually studied harmonic patterns and made trades using the harmonic framework ?