Does anyone have any idea how often let's say 15-20 red streak come and go? Would like people who have somewhat of an idea, thanks!
Having 15-20 red in a row is not something extraordinary but first, be specific if this is all about dice or roulette.
If you believed that martingale will work, well it doesn't work. Logically speaking, it will increase your input that continues to reduce your chance of losing everything. The fact, it doesn't make you win and the truth is always the house will win. Don't think too much of profit when you are in gambling, just enjoy the game and if you will win it is better. To be honest, I'm not that kind of gambler who doubling the bets just to cover losses.