Buffallo it is easy. First you play only virtually until 3 double streets don't repeats e.g 141, 266 that's repeat not allowed. Must be 153, 123, 562 and so on.... Then you bet last coming double street again if lost bet last 2 double streets, if lost you bet 3 double streets and if lost again you bet 4 last double streets. You are betting on that one double street will repeats. Only difference is that you bet the 4 steps progression every time you lose.

Roolette, the 4 step progression would be enough to lose before go home. Don't need to be negative even when beaten up.

P.S.

We could include one more step in progression to bet 5 double streets x 36 units but what happens if zero comes (cover also the zero)? That would be 99% winning system. You would lose only if in 6 spins comes all different street like 2-5-3-6-1-4. Even that could be won if you win 2 x in row 5 streets bet.

In old times I was betting: 1x$5, 2x$5, 3x$10, 4x$30, 5x$180, and if lost next 2 bets: 5x$100 must be won. Ended +$35. From bet 5th zero must be covered. Online casinos offer min. bet for double lines $1,-.

Hermes