18+ | Play Responsibly | Wagering requirements and T&C’s Apply | Commercial Content

Roulette Strategies & Systems

Here are a few tables and some data to help you get an overview of the potential winning roulette strategies available to you.

Here too, we must emphasize that these are different ways to play roulette. We cannot guarantee wins with these roulette strategies.

Strategy Likelihood of going bust Likelihood of big win
Martingale Low Low
Reverse Martingale High High
D’Alembert High Low
Reverse D’Alembert Medium Medium
Fibonacci Low Low
Reverse Fibonacci High High
Labouchere Low Low
Reverse Labouchere Medium High
Oscar’s Grind Low Low
Paroli Medium High
Cover The Table Medium Low
Flat Betting Low Low

Go to Unibet Casino

The Martingale roulette system

The Martingale strategy (also known as the Mayer technique) originated from necessity. How could a gambler, bettor or tradesman guarantee their investment would end up winning no matter what happened to the market? Simple – you double your lost bets until you hit a win. This means that you will always recoup your lost bets. If you employ the Martingale strategy, you should have a one hundred percent winning probability.

Yet, anyone who applies this strategy successfully must have an infinite bankroll. Watch this video to get the martingale strategy explained:

Theoretically it’s perfect. In actual fact, it’s very, very flawed.

Loss Streak Final Outcome Bet Size Total bets Net Outcome Probability
0 Win 1 1 1 49.2929%
1 Win 2 3 1 24.9950%
2 Win 4 7 1 12.6742%
3 Win 8 15 1 6.4267%
4 Win 16 31 1 3.25881%
5 Win 32 63 1 1.65245%
6 Win 64 127 1 0.83791%
7 Win 128 255 1 0.42488%
8 Win 256 511 1 0.21544%
9 Win 512 1023 1 0.10925%
10 Win 1024 2047 1 0.05540%

Due to the mathematical success variant, the Martingale strategy forced casinos to employ maximum limits to stop this system ever being put into practice. If stakes were unlimited, you’d most likely run out of money eventually.

For example, if you bet £5 on red/black, double the bet each time and lose 13 bets in a row (it happens more than you think) you’d need £40,960 to cover the next bet…

Go to Unibet Casino


You can experience the likelihood of different outcomes with the Martingale strategy in the Interactive RouletteGeeks Strategy Simulator.

Want more? Read an in depth appraisal on the Martingale system.

Reverse Martingale

This is a positive version of the Martingale system (also known as the reverse Mayer technique). There, you double your bets after each win and stop betting after each loss. Equally risky in the long term, the trick with the reverse Martingale is that, in the words of Kenny Rogers, “…you got to know when to hold’em, know when to fold ‘em, know when to walk away, know when to run’. If you double your wins, it won’t go on forever, so bail out while the going’s good.

If you would like to learn this positive version of the Martingale system, we recommend that you watch this video and learn about the Reverse Martingale strategy:

If you want to know even more about the strategy. This book will give you a very thorough insight on how the Reverse Martingale system works.

D’Alembert Roulette System

Named after Jean-Baptiste le Rond d’Alembert, a French gentleman who wrongly believed that the more a coin flipped to ‘heads’ the more likely it would land on ‘tails’ thereafter, the D’Alembert system dictates you start with an even bet (on odds for example), staking £5.

If you win that game, you keep the stake the same for the next game, but if you lose you have to increase the bet by the same £5 amount.

So if you lose that £5 bet on the first round of roulette, you would then have to stake £10. If you then lost that bet, you would have to bet £15, the original stake being the concurrent unit.

On the flip side, when you win you decrease your bet by one unit, in this example £5, but you never go lower than one single £5 bet.

In theory, you would win about the same amount of stake money as you lose.

Like the regular Martingale system, this system needs to be managed with mink gloves to ensure that when the ball misbehaves you aren’t bankroll committed.


You can experience the likelihood of different outcomes with the D’Alembert strategy in the Interactive RouletteGeeks Strategy Simulator.

To get a first overview about the d’Alembert strategy we recommend you to watch this video:

Want to know more about the D’Alembert system? Read this scientific paper.

Reverse D’Alembert

The Contra D’Alembert system (to give it its formal title) uses even money bets like red/black, high/low and odd/even in roulette. Similar to the Martingale system, you bet a stake and double your bet in each game you win, whilst halving your bet of you lose.

So, a bet of £20 that won dictates a stake of £40 off the back of a win and a stake of £10 off a loss. Very simple, quite fallible.

Learn more about how to use Reverse Martingale strategy in this video:

Fibonacci Roulette System

The Fibonacci roulette system is a very simple way to apply one of the most stunning mathematical formulas.  Looking at the Nautilus shaped diagram, you can see a natural symmetry in practice. In roulette system terms, it works like this:

When you start using the Fibonacci System, you start on the second “1” to the right side of the middle.

Go to Unibet Casino

diagram of formula predicting roulette ball trajectory

You then place a £1 (or 1 unit, depending on your bankroll) bet. If that bet loses, you move one place further (counter-clockwise) on the curve in this example, to the number ‘2’). If the bet wins, you move two places back (clockwise). In this case, you would have now successfully completed the sequence.

How much of your bankroll you bet each time will be the sum of the two numbers to the left in the sequence:

  • If you get to 2, you bet £2 (1 + 1).
  • If you get to 21, you bet £21 (8 + 13)
  • If you get to 377, you bet £377 (144 + 233)

Your aim and goal is to keep moving clockwise until you get to the first number – the first ‘1’ in the diagram. You’ll have made a £1 profit on the series, and can start a new series – starting from the second number from the left once again.

To learn the strategy you should check out this video and you will learn much more about the Fibonacci Roulette Strategy.

You can experience the likelihood of different outcomes with the Fibonacci strategy in the Interactive RouletteGeeks Strategy Simulator.


Reverse Fibonacci

This, like the reverse Martingale and contra D’Alembert simply flips the Fibonacci sequence system in reverse. It isn’t, in our opinion, a valid or successful a strategy. Just watch this video about the Reverse Fibonacci Strategy:

Go to Unibet Casino

La Bouchere Roulette System

Like the Martingale system above, the Labouchere system suggests you’ll bet even money outside bets like red/black or high/low. However, the Labouchere system requires you to jot down sequences of numbers to utilize it.

For example, if you were trying to win £20 you would divide that amount into five segments and write them down. These segments could be:

3 4 6 4 3

You then take the first and last number in that sequence, add them together, and bet the total amount. In this case, the total bet amount would be £6, and as such you’d bet £6 on ‘even’. Should you win the bet, you then cancel the first and last numbers on your list, leaving you with:

4 6 4

Then repeat the scenario on the next spin, again adding the first and last numbers. 4 + 4 gives 8, so you’d bet £8 on ‘odd’. Should that win, you have a 6 left on your list, staking this on an outside 50:50 bet accordingly, for example ‘High’.

If you’re lucky enough to win that bet too, you’ve covered all the numbers in your sequence and have completed the system. Your winnings should amount to £20, assuming you’ve made no inside bets.

You can read more about the La Bouchere system in this very detailed book. Or watch simply this video which explains you the system.

Reverse La Bouchere

As with other famous systems, this is not a case of aiming for wins, as in the original Labouchere system, but mitigating losses.

If we use the same numbers as above from your note pad, that is 3 4 6 4 3,

the first and last numbers determine the bet size. The initial bet would amount to £6, but you only add the 6 to the end of the sequence if the bet wins. If it loses, you subtract the first and last numbers meaning: –

  • The sequence would become 3 4 6 4 3 6 if you won
  • The sequence would become 4 6 4 if you lost

When every number has been erased, you’ve lost and have to start again with a new set of numbers. You need to stop when you’ve won a predetermined amount.

Watch this video to learn more about the Reverse la Bouchere system:

Read more about the Reverse La Bouchere system.

Oscar’s Grind

American writer Allan Wilson coined the phrase ‘Oscar’s Grind’ after meeting a roulette player whose system relied on roulette bets never getting too big – he simply grinds out a small win every day. Again it’s an even money, outside bets system that applies to European roulette for the beneficial player edge against the house.

To play the Oscar’s Grind system you bet with £1 but then don’t increase your stake until you see a loss and subsequently increase your bet to £2. Your bets should stay at £2 until you’re in net profit at which point the bet should go back to £1, or, if there has been a series of loses and then a win increase to 3.

Your aim is to make a profit of £1 after each run of bets – and that’s it. It’s not glamorous, but it is solid, and many players swear by this ‘safe and solid’ system to manage a gentle yet positive uplift in their bankroll. In practice an Oscar’s Grind game starting with a £100 bankroll would look something like this:

Bet £1 and win: You are up £1 and keep wagering £1. This string wins so we start a new string from scratch.

Bet £1 and lose: You keep wagering £1 until you see a win then the bet is raised to £2.

If you see a string of losses and then a £1 win unit the bet is raised to £2, then another win at £2 but the string is still in negative equity so the next bet should go up to £3. Carry on through to £4 and higher if the string is still in negative profit.

If you lose all your £100 bankroll, that’s it. Game over. If things go well (and remember, this is a grinding strategy) your string ends at +£1. If you choose to start a new string at + £1 then that’s your call…

Watch this video to learn more about the Oscar’s Grind system:

The Paroli System

As with other simple systems mentioned above the Paroli System relies on you placing outside even money bets on roulette. The system is very simple to employ and whilst it won’t make you Lottery wins in returns it is a useful bankroll management system that can help exploit positive runs in luck whilst mitigating negative runs.

To understand and then utilize the system, assume you have a £200 bankroll that you’re happy to play with £5 as your standard bet per game.

If the first bet loses, then maintain the same stake for the next game. If you win that bet, then double the stake to £10. In effect, when you lose go back to your original bet amount and when you win you should double your bet.

At this stage here’s where the Paroli system differs from others:

If you win three bets on the trot, immediately go back down to your original £5 stake.

The Paroli System is based on likelihood – and the fact that lucky runs tend to be shorter rather than longer. This system bails you out of a winning run before you lose your earnings.


You can experience the likelihood of different outcomes with the Paroli strategy in the Interactive RouletteGeeks Strategy Simulator.

Read a more detailed review and guide on how to play the Paroli system.

Or watch the video about “How to Use the Paroli System in Roulette”:

Cover The Table

This is, as the name suggests, a simple way to try and guarantee a win on every spin. You simply cover most but not all of the game grid numbers on the roulette table. There are a couple of obvious flaws in this strategy: –

  1. When you win, you win small as you’ve covered the table.
  2. When you lose, you lose big.

Simply put, this is not a tactical, useful, sensible, intelligent, astute or winning strategy for playing roulette online. Leave it to the Vegas holidaymakers with too few chips and too many Mojitos.

Watch here and learn more about the Cover the Table system:

Flat Betting

Flat betting is simply betting a set amount on every spin. You may have employed some elements of strategies or systems outlined above, or you may simply have lucky inside bet numbers in mind.

Either way, whilst flat betting, as long as you follow the 3 Rules of Perfect Roulette Strategy for bankroll management and bet selection, you should be able to avoid the hard times whilst making hay in the sunshine.


You can experience the likelihood of different outcomes with the flat bet strategy in the Interactive RouletteGeeks Strategy Simulator.

Find out how flat betting works and watch this video:

What roulette strategy to pick?

What roulette strategy to pick, you are wondering? There is no right or wrong answer to this question. There are no strategies that can guarantee you win (authors selling such strategies are lying), but different strategies come with various risk levels.

Strategies like the reverse martingale are high risk strategies.

There is, however, also a large risk of losing your bankroll. Contrary, the Fibonacci roulette strategy is low risk. It’s rare that you lose all your boney, and equally rare you get a big win. But if you can live with smaller wins, this might be right for you.

We encourage you to spend some time with our roulette strategy simulator to better understand how risky different strategies are. This is the only true way for you to find the best online roulette strategy. This point about no superior strategy is a bit different to other games such as Blackjack and Craps, where you can influence the overall payout rate – and thus chance of winning – through your selections.

Go to Unibet Casino

Roulette Bots

Consistent roulette winners have one thing in common – they manufacture some kind of edge over the house. Some players believe they can utilize technology to enhance their edge, the most common of which are Roulette Bots.

These ‘robot’ software systems sit on your computer or tablet and calculate the perfect strategy for you as you play. They apply your bankroll, betting limits and the game permutations to recommend your next bet strategy. Bots attempt to use roulette algorithms to predict the outcomes of spins (see below segment for more information on algorithms).

Using one of the most popular as an example, Roulette Bot Pro uses 5 independent betting methods to enhance a player’s gameplay. The Bot software operates like this:

Method 1 – Sleepers: Waits a number of times determined by the player for a category to miss, then bets on that category. Uses Martingale progression or a player’s own progression system.

Method 2 – Reverse Sleepers: Waits a number of times determined by the player for a category to repeat, then bets on all the bets in that category except the one that has repeated. Uses martingale progression by default or you can program your own customized progressions. 

Method 3 – Super Singles: Proprietary flat betting for single numbers without progressions. This method waits a predetermined number of times inputted by the player as data history. Uses “Y” (user defined) numbers to bet on as sleepers, repeaters or sometimes both.

Method 4 – Proportion Probability: Tracks bet hits within a predetermined spin cycle before betting on numbers that complete the cycle when proportional probabilities of a winning % and positive anticipated value is in favor of that bet.

Method 5 – Progression Recovery: This option can only be used in conjunction with the reverse sleepers system. It allows you to recover any loss over “X” (user defined) times on 2 different levels.

Obviously if roulette bots guaranteed consistent wins then roulette would have ceased to operate as a betting game many years ago. However, you may want to use software like this to help with your bankroll management and game strategy.

Roulette Algorithms

You can delve into ball spin dynamics and wheel spin mechanics – some of this information is interesting but holds little use in an online roulette game. Read also more about game algorithms and spin mechanic and in depth account of roulette algorithm .

Go to Unibet Casino

18+ | Play Responsibly | Wagering requirements and T&C’s Apply | Commercial Content