Hi. There is something wrong with formula for frequency of loosing streak. For most time i play on payout 11x (9% chance).
Your formula "says" that 20-long loosing streak will happend once for:
1/((9/100)^20)=822 526 333 996 995 908 128 rolls
Such streak can be seen couple times per 1000 rolls.
Do I count it corectly?