Interesting, because very close to a flat bet!I try, but I'm afraid that, even in this original and clever way, if you have a deviation ("ecart") 3,5 or more (Marigny ratio) you reach the table limit. I must confess that, in any case is more resistant than Labby or Johnson. The real enemy of players is zero (and double zero, in Europe almost unknown) in the long term, but in the short term is the deviation (ecart). Any system doesn't resist to Marigny ratio above 3.5/4. Sorry to be a bit "teacher": Marigny ratio is, for Red and Black for instance, Red minus Black (or vice versa, it must be a positive number) divided by the square root of total, Black plus Red. EXAMPLE: 36 decisions, 24 Black,12 Red, Marigny ratio is 2. Never seen in the story of roulette more than 5,5. But 3,5 or even less, it depends on the progression, is the end for the player, and is very frequent. I test all progressions with Marigny ratio 4 (rare,but quite possible). Above I have seen one time in my 35 years life of gambler 4.8, never more. Try and if you have a progression, apart flat bet, that resist to 4, THIS is the good method!!