have heard of it, used it and it seems remarkably good interms of its acurracy. I use it because i like to have a degree of confidence in a market move and i dont like to spend all day looking at a screen and so use limits and stops to open and close. The Original Camirilla equation is remarkably good for trading the open, especially on the dow, for quick and often enough substantially profitable trades. If your smart enough, you can work out the formula behind the original equation as its not as complicated as `they` try and make out 😉 I`m still trying to work out the {b} formula as id like to save the money if i can! In my experience, though both formulas spell everything out for you on an intraday basis, you still need discipline and ned to know your market inorder to avoid getting stopped out unnecessarily. In a nut shell its a simple and pretty neat system in my opinion. Its made me more than its cost me and seems to reduce the level of my exposure time wise pretty consistantly as long as i follow the rules.
There is also a website that gives you the original equation levels for the dow for free.