The primary Fibonacci ratios that I use in identifying wave retracements are .236, .382, .500, .618 and .786. Some of you might say that .500 and .786 are not Fibonacci ratios; well, it’s all in the math. If you divide the second month of Leonardo’s rabbit example by the third month, the answer is .500, 1 divided by 2; .786 is simply the square root of .618.