I'll copy and paste my post from roulette forum cc
The experts here may like this? Let me know if it is flawed...
It is my stretched martingale
10 10 20 20 40 40 80 80 160 160 320 320
but here is how you do it: if you WIN the first bet you continue in the progression until you lose, when you lose, reset. reset when you lose and start back at 10.
now if you lose on the 1st bet, or lose at 10 after you reset then you switch to the negative progression and continue along until you win. once you win reset back to 10 and start over.
so to recap, if you win the 1st bet treat it as a positive progression and continue along until you lose. if you lose the first bet treat it as a negative progression and continue along until you win. always resetting back to 10. you are looking to take advantage of streaks. If it switched to a negative progression all you have to do is guess right by id say the 8th bet then it shouldnt be too hard to recover