Martingale System

The Martingale System is a collection of various betting strategies that was first formulated in France in the 18th century.  The most basic strategy, which focuses on events that have even odds, such as choosing if the flip of a coin will result in heads or tails, is what is used today by many roulette players.
 
The Anti Martingale System was developed in reaction to the Martingale. Basically, this strategy, as the name indicates, works in the opposite manner of the system that inspired it.