"A perfect compression triangle over 8 months is anything but useless!" Agree.
But that is not what I stated.
I restate that the method used per my sine wave example is useless because it exhibits that compression triangle. It is inherent to the method and subject to give false impression.

Aside; I just read an interesting commentary from Casy Research:
http://www.321gold.com/editorials/casey/casey040908.html