That is just ridiculous, lose against a 6 or 7 streak, one needs to win 7 times before they encounter another 6 or 7 streak just to break even. Back to back streaks of 6 kills it dead, repeating streaks of 6 or 7's in a single shoe, kills it dead. FFS Avoid any Marty, even a 3 stepper, in all circumstances. My testing years go showed positive progressions offered no advantage whatsoever, however if you wish to explore, then I suggest consider a positive d'alembert, as this performed better than the rest, I think it's best if you apply a delay with it, to handle the frustration of single wins, as in 1-1-2-3-4-5-6-7- etc. You also need to consider snaring a simple WWW is 99% against you, it happens when betting long chops or a streak, repeating two's.