Tap Red, Black, Even, Odd, 1-18 or 19-36 to choose the even-money bet you play.
Choose your settings, then tap “Spin”.
Doubles the stake after each loss, goes back to the base stake after a win.
Follows the sequence 1, 1, 2, 3, 5, 8…: one step up after a loss, two steps down after a win.
Adds one base stake after a loss, takes one away after a win.
Doubles the stake after each win, up to the number of wins you aim for, then goes back to the base stake.
Always bets the same amount: the benchmark for comparison.
More settings
Bankroll (current)
—
Profit / Loss
—
Number of spins
—
Win rate
—
Bankroll over time
Results history (last 20 spins)
How the numbers fell
- Red0
- Black0
- Zero0
Other statistics
- Even0
- Odd0
- 1-180
- 19-360
Strategy comparison
| Strategy | Final bankroll (average) | Profit / Loss (average) | Sessions in profit | Risk level |
|---|---|---|---|---|
| Martingale | — | — | — | — |
| Fibonacci | — | — | — | — |
| D'Alembert | — | — | — | — |
| Paroli | — | — | — | — |
| Flat bet | — | — | — | — |
Risk level: share of sessions that lose at least half of the bankroll (under 3%: low; under 15%: moderate; above: high).
Tips & explanations
What is this simulator for?
The H24Roulette simulator lets you test strategies (Martingale, Fibonacci, D'Alembert, Paroli), watch how they behave over hundreds of spins and analyse their results: wins, losses, win rate, bankroll over time.
It is a practice and analysis tool, with no risk and no real money. Every number is drawn at random by your browser, just like on a real wheel.
The four strategies
The Martingale doubles the stake after each loss; Fibonacci follows the sequence 1, 1, 2, 3, 5, 8…; D'Alembert adds or removes one base stake; Paroli doubles the stake after each win.
Each one has its own page, with its rules, a calculator and its risks explained step by step.
Martingale · Fibonacci · D'Alembert · Paroli
Using the simulator well
1. Choose your bankroll, your base stake and a strategy. 2. Tap “Spin” for one spin, or “Auto” to play the whole session. 3. Look at the chart and the statistics.
Then compare: the “Strategy comparison” table replays 1,000 sessions of each strategy with your settings. Change the table limit or the bankroll to see what blocks the progressions.
Key points
Every spin is independent, and zero makes every even-money bet lose: that is the house edge, 2.70% on European roulette and 5.26% on American roulette.
No strategy beats this edge. A session can end in profit, but on average they all lose. Never play more than you can afford to lose.