Fibonacci strategy in crash games: how it works and how it tests
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The Fibonacci strategy in crash games bets along the sequence 1, 1, 2, 3, 5, 8, 13 (in units): one step forward after a loss, two steps back after a win, with a 2x cash out every round. It climbs much more slowly than Martingale’s doubling, and the two-steps-back rule means a single win claws back most of a short losing run. In our 10,000-session test most sessions finished ahead; about a third ran dry when a long cold streak hit. Here’s how it works and what the numbers say. Part of our crash game strategy guide.
Fibonacci, step by step
$10 unit, 2x cash out:
| Round | Step | Bet | Result | Running total |
|---|---|---|---|---|
| 1 | 1 | $10 | Loss | −$10 |
| 2 | 1 | $10 | Loss | −$20 |
| 3 | 2 | $20 | Loss | −$40 |
| 4 | 3 | $30 | Win | −$10 |
| 5 | 1 | $10 | Win | $0 |
A win doesn’t always get everything back, but a couple of wins close most gaps.
The danger zone
| Losses in a row | Total lost | Next bet | Chance at 2x |
|---|---|---|---|
| 5 | $120 | $80 | 3.6% |
| 6 | $200 | $130 | 1.9% |
| 7 | $330 | $210 | 1.0% |
With $500, seven straight losses leave you unable to place the next full bet, and choppy runs can get you there too.
What 10,000 sessions show
$500 budget, $10 units, 2x, 100 rounds: median $620, best 10% at $740 or more, but 32.3% of sessions ran out of money. That’s the Fibonacci shape: frequent small wins, rare big losses. Flat bets at 2x finished at a median $460 with no busts; the average Fibonacci session wagered $1,848 against flat betting’s $1,000. See the full comparison in Martingale vs Fibonacci.
Playing Fibonacci smarter
- Cap the step at 5 or 8 units and reset there.
- Bank wins early: set a stop at +20%.
- Compare alternatives: Anti-Martingale raises after wins instead and keeps losses small; the classic Martingale strategy is the high-octane version.
We cover Fibonacci and D’Alembert together in D’Alembert and Fibonacci, and rank every system in the best betting system for crash games.
Try Fibonacci
Run it in Aviator or JetX, and test it in the simulator below first. Then take it to a partner casino.
Play smart: Fibonacci feels like it always wins until it doesn’t. A stop at +20% locks in the good sessions.
Strategy simulator
- Median final bankroll
- Unlucky (10th percentile)
- Lucky (90th percentile)
- Chance of going bust
- Median max drawdown
- Average rounds played
Example: 1000 sessions of 100 rounds, bankroll $500, base bet $10, target 2x, 3% edge
| Strategy | Median final bankroll | Unlucky (10th percentile) | Lucky (90th percentile) | Chance of going bust |
|---|---|---|---|---|
| Fibonacci | $630 | $0 | $740 | 31.5% |
| Fixed bet | $480 | $360 | $600 | 0.0% |
Run it a few times with different settings to find the approach that fits your bankroll and playing style.
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Frequently asked questions
What is the Fibonacci betting strategy?
You bet along the Fibonacci sequence (1, 1, 2, 3, 5, 8, 13…) in units: one step forward after a loss, two steps back after a win.
Does Fibonacci work in Aviator?
It wins small amounts in most sessions, so it feels great. But long losing runs push stakes up fast enough to empty about a third of 100-round sessions in our test.
What target should I use with Fibonacci?
2x, because the system assumes even-money bets.
How many losses can Fibonacci survive?
With $500 and $10 units, seven losses in a row add up to $330 and the eighth bet needs $210, more than you have left.
Is Fibonacci better than Martingale?
It climbs more slowly and busted less often in our test (32.3% vs 50.2%), with a much higher median. It still can’t beat the RTP.
Where does the sequence come from?
Each number is the sum of the two before it, a pattern described by the mathematician Leonardo Fibonacci.
By Daniel Foster · Crash Game Maths & Mechanics Analyst
Daniel focuses on the mathematics and mechanics behind crash games. His reviews examine RTP disclosures, volatility, multipliers, game mechanics and the mathematical principles behind different crash titles.
Fact-checked by Alex Morgan
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