The Fibonacci sequence is a set of steadily increasing numbers where each number is equal to the sum of the preceding two numbers.

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

Fibonacci retracements are tools to draw support lines, identify resistance levels, and place stop-loss orders. Learn how to use Fibonacci ratios in trading.

Fibonacci number sequence turns up throughout plant world, and art world too What do pine cones and paintings have in common? A 13th century Italian mathematician named Leonardo of Pisa.