COG is often misunderstood because it portrays ( like Zig Zag ) a perfect past. Having linear
regression logic, the present is often a different story. I personally do not trade with it, but
have noticed that it can serve as a very good overall trend channel style indicator.
With the COG, you can know where is the equilibrium point or the market consensus. When
the price is far from the COG, the probability to come back to the equilibrium point is strong.