I already tried to play with martingale but to be honest i don't gain profit instead i lose them all i tried to follow and also analyze the game after making the 6 straight lose trying to cool on betting to see your friend that you didn't give up on betting after loosing my bankroll i never tried playing with martingale im much more better to follow what i want in betting.
If you are having a bigger balance then you should win if you are playing according to your bank roll. I used to play martingale with a good balance and i am never in a loss because all my calculations are up to the point so that i do not bust even if hit 17 reds in 2x and if i hit the 17 red points i will still recover but my profit will take a hit.
There are incidents that people even hit over 30 continuous reds which are almost double what you have a fixed the limit for 17 reds. In this method, you should be very careful because it is probably fair game and you can't estimate how many reds can get continuously unless if you're ready to stop your game after 17 continuous losses and take the losses.