This undated photo shows a spruce cone with a marked fibonacci number sequence. A numbers sequence thought up by the 13th century Italian mathematician known as Fibonacci plays out in plants, from ...

Piano Keys: In an octave, there are a total of 13 keys (8 white and 5 black, arranged as 2 and 3).

As I mentioned in a recent Charts in Play, flag formations are one of my favorite chart patterns to trade. These triangles generally represent continuation patterns or pauses in a major trend.

What do pine cones and paintings have in common? A 13th century Italian mathematician named Leonardo of Pisa. Better known by his pen name, Fibonacci, he came up with a number sequence that keeps ...