The numbers 1, 1, 2, 3, 5, 8, 13, 21, 34, and 55 belong to a famous sequence named for the Italian mathematician Fibonacci, who lived more than 700 years ago.

After dividing 1 by 999-quattuordecillion (a number that’s 48 integers long), you get the Fibonacci sequence presented in neat, 24-digit strings. Here’s ...

Fibonacci attached no great significance to the sequence, and it was generally ignored through the years by all but dedicated mathematicians.

The Fibonacci Sequence Is Everywhere—Even the Troubled Stock Market The curious set of numbers shows up in nature and also in human activities.

The number of sequences that can be written is infinite since any random list of numbers will do. But some types of sequences are decidedly non-random—one of which being the geometric sequence.

Fibonacci retracement levels are depicted by taking high and low points on a chart, marking the key ratios, and using them in a trend-trading strategy.