This sequence of numbers was named the “Fibonacci sequence” in honor of Leonardo Fibonacci, an Italian mathematician who referenced this order of numbers in a book he wrote in 1202.

Greenberg tells io9 there’s nothing mysterious about the Fibonacci sequence appearing in 24-digit packets. For instance, he says, we can divide 1 by 99989999 and get 0. ...

Those key ratios are derived from the division of one Fibonacci number by another Fibonacci figure one, two or three places further in the sequence: 0 divided by 1, or 0; 1 divided by 1, or 1; 1 ...

Fibonacci retracement levels, derived from the Fibonacci sequence, are used to identify potential support and resistance levels. Key percentages include 23.6%, 38.2%, 50%, 61.8%, and 78.6%.