I studied it for a while years ago but really couldn't make heads ner tales from it but that may mean exactly nothing.
I finally settled on price and time...and even at that...mostly just price. Price will tell exactly what the consensus of traders is. Price patterns repeat and mimic themselves on all time frames.
I used to would not have given a plug nickel for any, and I mean any, indicators. Now, I have amended my beliefs because of the way the 50-66% fibo retracement has proved itself to me. It may be, after having had to capitulate to the fibo retracement, that my inability to understand the COT may be entirely a result of some short coming in my brain wiring that also existed in my inability to initially appreciate the fibo retracement.
Did that make any sense?? I think that was a long way around the barn for saying...No, I don't use it but that doesn't mean it can't be successfully used by someone else. :-))