1, 1, 2, 3, 5, 8, 13, 21, 34, 55, 89, 144, 233, 377... a numerical sequence of numbers. Each number is determined by the sum of the previous two numbers.
The relationship of this number sequence is the ratio of two successive numbers in the Fib. series - divide each number by the number after it in the sequence - you will move towards a particular constant value of 0.618034.
If you do the same calculation but skip over a number the result ratios approaches 0.38196. So, skipping the numbers by going in both directions you get infinitive number of Fibonacci ratios 0.24, 0.382, 0.618, 1.000, 1.618, 2.618, 4.236, 6.854, 11.090, 17.944.......
Fib. ext/projections used for projection EOWs. Im not familiar of practical using in trading applications numbers beyond 2.62/4.24