Test the Martingale system yourself, before you trust it.
Doubling your bet after every loss feels like it should "guarantee" a win eventually. It doesn't remove the edge — it just trades a high chance of small wins for a small chance of a bankroll-ending loss streak. Set your own numbers below and run a thousand simulated sessions to see the trade-off for real.
Simulated instantly in your browser. No real bets, no data sent anywhere.
Set your numbers and run the simulation to see how it actually plays out.
Sessions that ran out of bankroll before a doubling bet
Across all 1,000 simulated sessions, busts included
Highest ending bankroll observed
Lowest ending bankroll observed
Every single bet still has the same edge.
Martingale doesn't change the win chance or payout of any individual bet — each one is still exactly RTP ÷ target to win, worth (RTP − 1) × bet in expectation. Stacking a sequence of −EV bets together, however you size them, can't average out to a positive number. What changes is the shape of your outcomes: instead of many small losses, you get long streaks of tiny +1-base-bet wins, punctuated by rare but catastrophic bankroll wipeouts when a losing streak runs longer than your bankroll — or the table's own max bet — is able to absorb.
A 15-loss streak needs a base bet doubled 15 times — 32,768× the starting bet just to keep the system alive. No realistic bankroll survives many of those before hitting one.