I used to trade Elliot Waves, but find Harmonics to be better. Figuring out Carney's rule's is a bit tricky -- getting there. The EW background helps in locating the points.
Agree, that Carney does not explain well. Lots of contradictions and poor editing. I understand why some people reject Harmonics, yet they do seem to work pretty well. Not enough data yet, but looks like better than 50/50.
A Bloomberg article said most professional money managers have a 50/50 win/loss ratio and make money through trade and risk management. The best consistent win ratio was 64%.