The Paroli system is like the opposite of the Martingale system and very similar to the anti Martingale System. It's started with one bet and you increase it when you win and decrease it when you lose. The strategy of this system is not to bet all on winnings you have to increase it but you have to do it with caution. For example you can increase one unit with each win. With this system you will not required a large bankroll and you will bet with winnings.

Let's do an example: We start with 5 units, we win the first bet. Then the second bet we will increase it and bet 7 units. If we win, we will increase it again and bet 10 units. By now we're betting gain money. Then we lost the 10 unit bet, since we lost we will decrease the bet to 2 units that is the rest of the gain money. This is an example and another strategy can be done with this system. They key here is to bet only part of winning and no all the winning.