Best Roulette Strategy? We Tested 8 Systems Over 100,000 Sessions

Every one of the eight betting systems we tested lost money, and the least damaging thing a player can do at a roulette table is the thing no system tells you to do: bet the same amount every spin. We ran 100,000 simulated sessions per system on a single-zero wheel, each with a $500 bankroll, $5 on red, and up to 200 spins, because most roulette strategy questions assume one system beats the others. Flat betting lost $27.32 per session on average. The worst system lost $124.76.

If you want to feel how these progressions behave before reading the numbers, you can play any of them by hand on Wild.io’s roulette simulator, a free play-money table with a European and American wheel where you place every bet yourself and watch the bankroll move. The results below come from a separate simulation written for this article.

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• Across 100,000 simulated sessions each, all eight systems lost between 2.55% and 2.74% of everything they wagered on a single-zero wheel. That is the house edge, unchanged.

• Flat $5 betting lost the least: $27.32 per session, against $46 to $54 for Martingale, Paroli, Fibonacci, and 1-3-2-6.

• Every system cost more than flat betting, and every difference was statistically significant.

• Fibonacci finished in profit in 56.9% of sessions and still lost $51.68 on average.

• Martingale ran out of affordable bets in 68.6% of sessions on a $500 bankroll.

How did we test each roulette betting strategy?

We simulated 100,000 sessions per system per wheel: $500 bankroll, $5 base unit on red, up to 200 spins. Every system saw the identical spin sequence on each wheel, so the comparisons are paired session by session rather than drawn from separate samples.

A session ended early only when the next required bet was larger than the remaining bankroll, and the player kept whatever was left. There was no win target and no table maximum (a table limit was tested separately). James Bond was $14 on 19-36, $5 on the 13-18 six-line, and $1 on zero, $20 a spin. Labouchere used a 1-2-3-4 line with a $50 target, restarting when the line cleared. Paroli reset after three wins, and 1-3-2-6 followed its standard sequence.

The arithmetic sets the limits for everything that follows. On a single-zero wheel, an even-money bet wins 18 times in 37, or 48.65%, so the house keeps 1/37, a 2.70% edge. On a double-zero wheel, each of the 38 slots is equally likely, as the LibreTexts probability chapter on roulette sets out, so the same bet wins 18 in 38 and the edge rises to 2/38, or 5.26%. Expected loss is the edge multiplied by the total amount wagered. A system can change how much you wager and how the results are spread. It cannot change the edge.

Which roulette strategy lost the least money?

Flat betting, by a wide margin. It lost $27.32 per session on average, the smallest loss of the eight. The reason is mechanical: a flat $5 stake puts $1,000 through the wheel in 200 spins, while the progressions pushed $1,691 to $4,717 through it, chasing the same even-money outcome.

Table 1: European wheel (single zero), 100,000 simulated sessions per system

Source: simulation run for this article. $500 bankroll, $5 unit, up to 200 spins, single-zero wheel. SE is the standard error of the mean. “Couldn’t afford next bet” means the session ended because the system demanded more than the bankroll had left.

Source: simulation run for this article, 100,000 simulated sessions per system, European wheel.

The realised-edge column is the real finding. All eight systems gave back between 2.55% and 2.74% of everything they wagered, almost exactly the house edge. That is the whole mechanism: wager more, lose more. Martingale, Paroli, Fibonacci and 1-3-2-6 sit together between $46 and $54 per session, roughly twice the cost of flat betting and too close to each other for the choice between them to matter.

Because every system saw the same spins, we can compare them session by session. Against flat betting, the average extra loss per session was $19.08 for Paroli (±0.27), $21.43 for Martingale (±1.11), $24.36 for Fibonacci (±0.77), $26.34 for 1-3-2-6 (±0.37), $80.83 for James Bond (±0.64), $91.28 for D’Alembert (±1.14) and $97.44 for Labouchere (±1.79). Each of those gaps is many standard errors from zero, so none of them is noise.

Two columns deserve a closer look. Labouchere could not afford its next bet in 83.6% of sessions and finished $250 or more down in 77.5% of them. D’Alembert, which adds only one unit after a loss, finished $250 or more down in 57.0%.

Why did Fibonacci finish in profit 56.9% of the time and still lose money?

Fibonacci ended 56.9% of sessions in profit, with a median result of +$125, and still lost $51.68 on average. Both numbers are true at once, and the reason is the size of the losing sessions.

Fibonacci raises the stake after a loss and steps back two places after a win, so most sessions grind out a modest gain. But in 42.3% of sessions the progression demanded more than the bankroll could cover, and 41.5% finished $250 or more down. With the bankroll capped at $500, a bad run takes far more than a good run gives back.

A system can win more often than it loses and still lose money, because “how often” and “how much” are different questions. Any system that wins small and loses big will show a majority of winning sessions in exactly this way. Here, the median session finished $125 ahead and 54.2% of sessions finished $100 or more ahead, yet the average was a loss.

Does the Martingale roulette strategy work with a bigger bankroll?

On a $500 bankroll, Martingale ran out of affordable bets in 68.6% of sessions. A bigger bankroll fixes that and makes the average result worse.

Table 2: Martingale by bankroll size (European wheel, same spins, $5 base unit, 200 spins)

Source: simulation run for this article, 100,000 sessions at each bankroll level, identical spin sequences.

With $100,000 behind it, Martingale finished in profit in 98.3% of sessions and still lost $212.71 per session on average. With a $5,000 bankroll, the median session finished $475 ahead. The win rate climbs because the progression is rarely interrupted. The average gets worse because the rare losing run can now go all the way to an $81,915 loss.

Put plainly, a bigger bankroll doesn’t buy an edge. It buys a longer streak of small wins and one much larger loss. At $100,000, the standard error is ±$23.32, because even 100,000 sessions can’t pin down the average when the losing tail is that heavy. That tail is the system.

What happens when the table has a maximum?

Real tables cap bets. With a $5,000 bankroll and a $500 table maximum, 59.9% of sessions hit the cap at least once, 62.5% finished in profit, and the average loss was $119.04. Once the cap stops the doubling, a losing run can no longer be recovered.

How much worse is American roulette?

The double-zero wheel roughly doubles every loss, because the edge roughly doubles: 5.26% against 2.70%. Flat betting lost $52.82 per session on the American wheel against $27.32 on the European one, and only 20.7% of sessions finished in profit against 32.4%.

Source: simulation run for this article, 100,000 simulated sessions per system per wheel.

On the American wheel, the other systems lost, per session: Paroli $87.96, Martingale $95.72 (74.0% of sessions unable to afford the next bet), Fibonacci $100.35, 1-3-2-6 $102.81, James Bond $204.66, Labouchere $218.95 and D’Alembert $220.31.

The wheel is the only choice in this test that improved every system’s result, because it is the only one that changes the edge. Moving a flat bettor from double zero to single zero saved $25.50 a session, while switching to any system only added cost. Some single-zero tables also use French “la partage” rules, which return half of an even-money stake when zero lands and cut that bet’s edge to 1.35%. We did not model them here.

Crypto traders already run Martingale: it’s called a bot

The pattern in Table 2 will look familiar to anyone who has run a Martingale bot on a derivatives exchange. According to Bybit’s guide to its Futures Martingale Bot, the bot automatically doubles down on an open position using a position multiplier and a maximum number of additions per round, and the same page lists liquidation as a risk.

The structure is the same: frequent small wins, paid for by a loss that arrives rarely and arrives large. Our numbers show what that looks like across 100,000 runs: 98.3% of sessions in profit at a $100,000 bankroll, and an average loss of $212.71.

One difference is worth stating honestly. Roulette has a fixed, known edge of 2.70% against the player, while a trading strategy’s edge is unknown and may well be positive. What carries over is the bankroll maths, not the edge. A doubling progression turns a small expectation into a high win rate with a heavy losing tail, whatever you are betting on. Liquidation is the exchange’s version of “couldn’t afford the next bet”, the column that reached 68.6% on a $500 bankroll.

What is the best roulette strategy for a small bankroll?

On these numbers, the least damaging approach on a small bankroll is also the least exciting one: a flat stake on an even-money bet, at a single-zero wheel, for several spins decided before you sit down.

Expected loss is the edge multiplied by the amount wagered, so wagering less is the only lever a player controls. Flat betting put $1,000 through the wheel where the progressions pushed $1,691 to $4,717. It never once ran out of affordable bets, and it finished $250 or more down in only 0.1% of sessions, compared with 45.9% for Martingale and 77.5% for Labouchere.

This is damage control, not an edge. Flat betting loses too, just slowly and predictably, with a median session of $30 down.

Roulette strategy FAQ

What is the most successful roulette strategy?

None of the eight we tested beat the house edge. All of them gave 2.55% to 2.74% of everything wagered back to the house. Flat betting lost the least, $27.32 per session, because it wagers the least.

Does the Martingale system work in roulette?

No. Across 100,000 simulated sessions on a $500 bankroll, it lost $48.75 per session on average and ran out of affordable bets 68.6% of the time. A $100,000 bankroll raises the share of winning sessions to 98.3% and the average loss to $212.71.

What is the James Bond roulette strategy, and did it perform better?

It covers 13-36 plus zero with $20 a spin: $14 on 19-36, $5 on the 13-18 six-line, and $1 on zero. In our test, it lost $108.15 per session with 28.4% of sessions in profit, because it wagered $3,966 per session, about four times as much as flat betting.

Is roulette 100% luck?

The spin is. A player controls only the wheel and the amount wagered. A single-zero wheel carries a 2.70% edge against 5.26% for double zero, and the expected loss is that edge multiplied by everything put on the table.

Is there a trick to the roulette table?

Not on a fair wheel. Each pocket is equally likely, and every standard bet carries the same house edge, so no order of bets changes the expected result. In our data, systems changed how results were spread, never the average.

What is the best roulette strategy for a small bankroll?

A flat stake on an even-money bet at a single-zero table. It was the only system in our test that never ran out of affordable bets (Paroli came closest, at 32 of 100,000 sessions), and it finished $250 or more down in only 0.1% of sessions.

What is the 3/2 rule in roulette?

Three chips on black plus two on the third column, covering 26 of 37 numbers. We didn’t test it, but coverage bets don’t change the arithmetic: every combination of standard bets carries the same 2.70% edge on a single-zero wheel.

The useful finding

The useful finding isn’t which roulette strategy wins, because none do. It’s that the two systems that pushed the most money through the wheel, D’Alembert and Labouchere, at $4,366 and $4,717 a session against flat betting’s $1,000, dug the deepest holes, while the plainest option lost the least.

Roulette is a negative-expectation game, so treat any stake as the price of entertainment, not an investment. If gambling stops feeling optional, the National Council on Problem Gambling runs a national helpline: call or text 1-800-MY-RESET, or chat online.

Sources

1. LibreTexts Statistics, Siegrist, “13.5: Roulette”, double-zero wheel probability model, retrieved 2026-09-30

2. Bybit Help Center, “Introduction to Futures Martingale Bot”, retrieved 2026-09-30

3. National Council on Problem Gambling, Help and Treatment, retrieved 2026-09-30