Dozen Based Triple Martingale System is as the name suggests based on the dozens. Instead of just bet on one dozen you bet on two dozens. After a loss you multiply your bet by three for the next bet. If lost you then times your bet by three again and repeat the process until you get a win.
There are quite a few articles on the internet about people who have made a lot of money following this roulette system.
Clearly by playing this system you are playing a risky game. However because you’re betting on two dozens you’re covering more than half of the table, so you could argue the chances of winning are higher
We have seen multiple consecutive spins of the same dozen so if you’re to use this system it’s better to wait until a dozen hasn’t appeared for a few spins and then bet on the other two dozens.