W D Gann was a master at finding patterns in the past to guide the future.
D Gann forecasters are following this chart:
Two patterns from the past with a correlation greater than 90% below. The more data in the pattern with a high correlation is more significant than short time frames, simply as they are rare.
"Mathematical science, which is the only real science that the entire civilized world has agreed upon, furnishes unmistakable proof of history repeating itself and shows that the cycle theory, or harmonic analysis, is the only thing that we can rely upon to ascertain the future." ~ William D Gann
"October: This is one of the peculiarly dangerous months to speculate in stocks. The others are July, January, September, April, November, May, March, June, December, August and February." ~ Mark Twain