The Gann ratios are similar to the Fibonacci ratios but not the same.
1/2, 1/3 (33%), 2/3 (66%), 1/4, 1/8...etc, are GAnn ratios.
http://en.wikipedia.org/wiki/Fibonacci_number
0,1,1,2,3,5,8,13,21,34,55,89,144,...
The above is the Fibonacci sequence. The ratio is found by...