The Martingale System is and old and simple system that is based to recover losses streak in one win. For example you start with one unit. If you win you take the unit won back to your pocket bet the unit in the table. If you lose, you will bet two units in the next bet. In other words you will double your bet following each loses in order to recover the losses. This strategy implies that you will recover losses with one big win and you will not risk any winning streaks.  The downside of this system is that you need to have a big bankroll if you fall to a loss streak.

Anti-martingale

This system is the exact opposite to the Martingale system. In other words you will double the bet after each win and reduced after a loss. The system strategy implies that you will take advantage with a winning streak and no follow loses.