So, if we take one of the negative aspects of martingale, it's that every time you have the same chance to win/lose, which is 50% + HE. Then why not to put bets which are with very low chance of losing instead of red/black and such and double them up.
For example:
1. 3 on 2nd third, 3 on 3rd third and 1 on a fourth 8-9-11-12 and 1 on fourth 1-2-4-5 (sorry, don’t know the exact roulette terms). Bet is 8 in total
This way you have only 5 free cells, where you can lose, which is 1 chance out of 7-8 (13%) turns it might happen.
If you win, you win 1 every time.
If you lose you will need to put 64 in total.
If you lose again, you will need to put 512 in total.
You can even add one another losing attempt, by dividing the doubling of the bet, thus you will need to win 2 turns in a row to win back the money, however, since you have 87% of winning its very likely to happen.
So difference between this strategy and the regular martingale, is that here you need to lose 4 times (even possible to extend it to 5) in a row where the chance to lose is only 13%. On regular martingale you have to lose about 7-9 times in a row with 50% chance. But since we know that the roulette has no memory and every new turn is not related to previous one therefore in martingale we always have 50% every next turn, chance of this strategy is higher IMHO.
What do you think?