Select a roulette version: Single Zero (European), Double Zero (American), or Triple Zero. Each version has a different number of slots and house edge.
Choose how many spins the test will simulate. If you select a higher amount of spins it will give you a better idea of long-term performance.
Set your starting balance for the test. It's wiser to choose a higher balance, as if it reaches 0 or the bet amount is higher than the balance the simulation will stop.
Choose a strategy to use during the simulation. Each strategy adjusts your next bet based on the previous spin's result (win or loss), which changes both risk and how quickly you try to recover.
Default (Flat Betting): Your bet stays the same every spin, no matter the outcome.
Double after loss (Martingale): After a loss, the next bet doubles. The idea is that one win can cover previous losses. After a win, the bet returns to the starting amount.
Example: 5 → lose → 10 → lose → 20 → win → reset to 5.
Double after win (Reverse Martingale / Paroli): After a win, the next bet doubles to take advantage of winning streaks. After a loss, the bet returns to the starting amount.
Example: 5 → win → 10 → win → 20 → lose → reset to 5.
+X on loss, -X on win (D'Alembert): After a loss, increase the next bet by X (your base unit). After a win, decrease the next bet by X.
Example (X=5): 5 → lose → 10 → lose → 15 → win → 10.
+X on win, -X on loss (Reverse D'Alembert): After a win, increase the next bet by X. After a loss, decrease the next bet by X.
Example (X=5): 5 → win → 10 → win → 15 → lose → 10.
The total amount won or lost by the end of the test. This is calculated by subtracting the Starting Balance from the Ending Balance.
Return on Investment (ROI) is a key performance indicator that shows how efficiently your strategy performed.
It measures how much profit or loss you generated for every unit wagered, expressed as a percentage.
A positive ROI means the strategy was profitable, while a negative ROI indicates a loss.
Total Win:
The combined amount of money won from all spins during the test.
Total Bet:
The total amount of money wagered across all spins, including every bet placed.
The highest and lowest bankroll values reached during the test, showing how your balance fluctuated over time.
The percentage of spins you won versus lost during the simulation. Any successful bet counts as a win, even if it was not profitable overall.
Biggest Win:
The highest amount you won on a single spin during the test.
Biggest Loss:
The largest amount you lost on a single spin during the test.
The longest consecutive sequences of wins and losses recorded during the test. This helps identify periods of "hot" or "cold" performance.
Average Payout:
The average amount received from winning spins, indicating how rewarding your wins were.
Average Bet:
The average bet size across all spins, showing how much you typically risked per round.
A line graph that shows how your balance changed over time during the simulation. The Y-axis represents your balance amount, while the X-axis represents the number of spins. This helps you quickly spot winning streaks, downswings, and overall momentum.
A detailed table displaying the outcome of every spin in the test. It includes the drawn number, win or loss result, bet amount, payout, and updated balance after each spin. This view is useful for closely analyzing where the strategy performed well or fell short.
A session-based table that shows your most recent 15 tests, with the newest test always listed at the top. When you run a new test (for example, test 16), it's added to the top and the oldest test is removed.
For each test, you'll see the test number, total profit/loss, ROI, and starting balance. This makes it easy to compare results and spot which strategies perform best over multiple runs.
Controls:
Click ▷ Test to open the full test details.
Click ▼ to expand a test and view all bets placed.
Note: Test history is stored only for this session—leaving or refreshing the page will clear it.
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