Roulette Betting System Simulator
Simulate popular betting systems and see their real performance
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Quick Answer
The truth about betting systems
No betting system can overcome the house edge. Martingale doubles bets after losses - it wins small often but risks catastrophic loss. With a $10 base bet, after 7 losses you're betting $1,280 to win $10. The house edge applies to every bet regardless of system. Simulations show all systems converge to expected loss over time.
Key Facts About Betting Systems
What the math tells us
- All betting systems have the same expected value: negative
- Martingale: High win rate but catastrophic when losing streak hits
- Fibonacci: Slower progression but still vulnerable to table limits
- D'Alembert: Lower variance but slower to recover losses
- Paroli: Positive progression - caps wins, limits losses
- The house edge cannot be overcome by any bet sequencing
- Short-term results vary wildly; long-term results approach expectation
Frequently Asked Questions
Common questions about betting systems
Why do betting systems seem to work?
Systems like Martingale win most sessions because small wins are common. But the math catches up: rare catastrophic losses wipe out many small wins. Over thousands of sessions, total losses equal (house edge × total wagered). No system changes this.
What is the Martingale system?
Martingale doubles your bet after each loss. Starting at $10: if you lose 3 times then win, you bet $10, $20, $40, $80 and win $80. You've bet $150 total to win $10 net. A 10-loss streak (not rare) would require $10,240 on a single bet.
Which betting system is best?
None is "best" because all have identical long-term expectation. Flat betting is simplest and has lowest variance. If you insist on a system, Paroli (positive progression) limits losses while still allowing some upside. But mathematically, all lose at the same rate.
Can simulations prove systems work?
Simulations actually prove systems DON'T work. Run 100,000 sessions with any system and total profit/loss will approach (house edge × total wagered). Short simulations might show profit, but that's variance - like flipping heads 7 times in 10 flips.