Roulette: Double Betting on Outside Bet Strategy

My friend MJ (No, not Michael Jackson) shared a roulette strategy with me. So I would like to try to do some mathematical calculation based on his theory.

The strategy is pretty simple actually: –

  • First we choose 2 out of 3 from either, Black/Red, Odd/Even or Big/Small.
  • we will add 2 unit of wager (+2) to the pool if we lose the round,
  • subtract 2 unit of wager (-2) from the pool if we win (down to the minimum wager)
  • if the result is a draw, we maintain.

The Pros and cons of Double Betting on Outside Bet Strategy

Minimum Wager: 2 units*
Maximum winning (per round): 4 units (21% – 27%)
Maximum Losing (per round): 2 units (24% – 29%)
Damage Reduction: (game draw per round) 0 units (70% – 75%)

Pros: –

  • Easy to understand and remember how to play
  • High drawing rate with a near equal chance between losing and winning
  • Minimize damage
  • fast recovery from losses

Cons: –

  • Low gain
  • Slow game pace

*Units can be any amount of currency you desired. However we will be increasing the unit by 2 every time we lose, hence I would encourage to start small.

Understanding Roulette Table Layout

First of all, we need to understand a little bit more about the layout of the roulette table: –

The basic: –

  1. Roulette has total of 37 numbers, from 0 – 36.
  2. 1 number is in green, which is 0
  3. 18 numbers in red and 18 numbers in black
  4. 18 odd numbers and 18 even numbers
  5. Small meaning placing bet on 1-18.
  6. Big meaning placing bet on 19-36.

The intermediate: –

  1. 10 odd numbers in RED (which is 1, 3, 5, 7, 9, 19, 21, 23, 25 and 27)
  2. 8 even numbers in RED (which is 12, 14, 16, 18, 30, 32, 34 and 36)
  3. 10 even numbers in BLACK (which is 2, 4, 6, 8, 10, 20, 22, 24, 26 and 28)
  4. 8 odd numbers is BLACK (which is 11, 13, 15, 17, 29, 31, 33 and 35)

The reason we listed out the details of the layout is because, by knowing the layout in details, we can now have a choice of either

  • balance between draw, win and lose,
  • higher draw rate with lower winning rate, or
  • lower draw rate with higher winning rate

even though the percentage of increasing and decreasing is just marginal.

The reason of the difference is simply because: –

  • We have 10 ODD numbers that is in RED, and 10 EVEN numbers that is in BLACK.

Mathematics Calculation

Like we mentioned from the start, it is easy to apply this theory in the game where: –

  • First we choose 2 out of 3 from either, Black/Red, Odd/Even or Big/Small.
  • we will add 2 unit of wager (+2) to the pool if we lose the round,
  • subtract 2 unit of wager (-2) from the pool if we win (down to the minimum wager)
  • if the result is a draw, we maintain.

This strategy give us a high possibility to DRAW in the game, meaning no lose no win, and a balance chance between winning and losing.


Balance in Win, Draw and Lose

Roulette- Balance Bet AFBcash.com
Selecting Red/Black and Big/Small

When we choose to double bet on big/small with either colour or even/odds, it is most balanced between the 3 choices of win, draw and lose. This is because there are an equal number of coloured numbers and odd/even numbers in the Big and Small section. This betting methods always bets on 18 numbers of big/small section with extra either 9 coloured number or odd/even numbers on the others. Hence giving the result: –

  • Draw game: 72.97% (27/37)
  • Lose rate: 27.03% (10/37)
  • Win rate: 24.32%  (9/37)

It is however different if you decide to choose pairing coloured numbers with odds and even numbers.


⇓ Draw Game Chance,⇑ Lose and ⇑ Win

Now let’s do another example with us choosing RED and ODD on the table

Roulette Red and Odd AFBcash.com
Selecting Reds and odds

we can see from the example above, we have wager on Red and Odds.

we have wager on a total of 26/37 numbers, which is betting 1 less number but increase the overlapping numbers by 1 as well.

so this will change total betting rate to : –

  • Draw rate: 70.27% (26/37)
  • Lose rate: 29.73% (11/36)
  • Win rate: 27.03% (10/37)

⇑ Draw Game Chance, ⇓ Lose and ⇓ Win

Take for example if we choose RED AND EVEN from the outside bet, we will be covering 18 numbers that’s in the black square (48.65%) and all the small numbers on the board (1-18).

Roulette Red and Even
Selecting Red and Even

In the above example, our wager on RED will cover 48.65% and EVEN will cover another 48.65% of the numbers.

However, because of the overlapping of selection, we total coverage is actually 28/37, which is 75.68% draw rate.

But the payout will be different because the overlapping of selection is where we will be getting a payout of 2:1, and this is where we are actually making our wager worth!

To simplify the calculation: –

  • Draw game: 75.68% (28/37)
  • Lose rate: 24.32% (9/37)
  • Win rate: 21.62%  (8/37)

Do note that the result for Black+EVEN is the same as RED+ODD and vice versa. Again, this is due to we have 10 ODD numbers that is in RED, and 10 EVEN numbers that is in BLACK. Hence, do choose a strategy that will match what you want.

I will need to stress here again that: –

Always set an fix amount of capital and set a healthy amount of winnings as your target. Once you hit your target, or worst come to worst you lose all your capital, stop the game. Always be sensible and do not get emotional over gambling and do not have the mindset of “My next betting is going to recover all my loses and gain me big bucks.

Gambling can be fun and exciting, but it is only a game.

Be a responsible gamer/ gambler.