Roulette Strategy Simulator
Run Martingale, D'Alembert, Fibonacci, Paroli or Labouchère over thousands of sessions and watch what really happens.
double after a loss
£500
spin 0/200
Simulating 5,000 sessions…
Every roulette betting system is a way of arranging your bets over time. Martingale doubles after a loss to recover in one hit; D'Alembert nudges the stake up one unit after a loss and down one after a win; Fibonacci walks up its sequence on losses; Paroli presses winners instead of losers; Labouchère crosses numbers off a list until the list is empty. They feel different, and their bankroll curves look different.
None of them changes the house edge. On a single-zero wheel every even-money bet wins 18 times in 37 and loses 19, for a 2.70% edge; a double-zero wheel is 5.26%. A system only redistributes that fixed expected loss across time — usually into a long series of small wins and an occasional catastrophic one.
This simulator runs your chosen system thousands of times with the parameters you set and reports the distribution: how often the bankroll is wiped out before the session ends, where the median session finishes, and how wide the best and worst cases are. Run a single session too, and watch the curve build.
FAQ
- Which roulette system is best?
- For expected value, none — they all return the same 2.70% (or 5.26%) loss over the long run. They differ only in variance: Martingale wins most sessions by a little and loses rare sessions by a lot; flat betting has the widest, most symmetric spread; D'Alembert and Fibonacci sit between.
- Why does Martingale bust so often in the simulator?
- Because doubling after each loss hits the table limit or your bankroll after a run of six or seven losses, which happens far more often than people expect over a few hundred spins. When it busts it gives back every prior small win at once.
- Can any staking plan beat roulette?
- No. As long as each individual spin is negative expectation, every finite combination of those spins is also negative expectation. Only a biased wheel or dealer signature — not a staking pattern — can change that.