The D’Alenbert (aka D’Alemberto) system is a Negative Progression and Insurance system. It’s a hybrid of the Martingale and Insurance betting systems.
After each losing wager you make, you increase your wager one unit – you decrease your wager one unit after each time your wager wins. The cycle and amount players increase or decrease can be changed to fit certain online casino games and online casino odds.
The Insurance betting system is where players lower the amount they wager if they win, commonly after a high first wager or after a short progressive win. This sort of wagering is considered safe and sound. It is a excellent concession.