Fibonacci sequence

In German: Fibonacci-Folge

The series 1, 1, 2, 3, 5, 8, 13, 21, 34 … in which every number is the sum of the two before it. The wave counts of the Elliott Wave principle (5 waves up, 3 down, 8 in a full cycle) are Fibonacci numbers, and the ratios between them give the Fibonacci levels.