People who have played roulette for a long time know that sometimes the ball continuously falls into the same kind of numbers (roulette delay).

As result, we can observe long series of the same color, same dozen, only low numbers, only pairs, etc. This, momentarily “eliminates” the diversity of results, causing a delay in the appearance of another kind of numbers.

Roulette: Delay of numbers.
Roulette: Delay of numbers.

The classic example that everybody has seen is a series of 5 numbers of the same color, for example red, which can be interpreted as a delay in the black numbers. This also happens in even-odd, high-low numbers (1-18 / 19-36) and for straight-up numbers.

A common technique among novice players and not so newbies is to wait for 4 or 5 consecutive same color numbers appearance to start betting the opposite color. Unfortunately, many have learned the hard way that there may appear more than 10 numbers of the same color. I have seen up to 14 consecutive red, then a zero and two more red numbers, that surely ended the hopes of more than one gambler. Previously, I have already presented a table with theoretical delay roulette that you can read here.

From the above, we can say that the delay in roulette does exist, but we can not know when or how it will happen, Do you?

Here I present a study to help you to better understand the delay of roulette and how to use it to our advantage. It is noteworthy that the results presented here are valid only for a European roulette.

Win profits at roulette.
Win profits at roulette.

 

As I said before, the delay can occur for any result from color until straight bets. However in Part I, we will focus on the delay of outside bets (18 numbers: color, even, odd, high and low numbers).

The first thing to understand is that the probability of winning at roulette every shot is obtained by dividing the 37 European roulette numbers by the numbers of the bet. In the case of a color bet, the probability of winning is 37/18 = 0.485 which means 48.5%. The probability of losing is obtained from the subtraction 100% -48.5% = 51.35%.

It only calculates the probability in a single spin of roulette, however it is more useful to analyze the odds for two or more spins. If we want to know the probability of losing a color bet twice consecutively do as follows: 51.35%2 = 26.37%. Then the probability of winning at least once in 2 spins: 100%-26.37%=73.67%..

Next table shows the results of probability of winning at least once from 1 to 15 roulette spins. You can see that from the second shot, the probability of winning is increased from 48.65% to 73.63%. And after seven spins that probability reaches 99%. On the other hand we see the probability of losing changes from 51.35% to 0.01%.

Roulette color bet.
Roulette color bet.

The figure at right shows the probability of winning after a delay. As you can see, after a delay of 7 spins the probability of winning a bet color is 99%. That number 7 represents the theoretical delay roulette, however in real life, it can be extended up to 13 or 15. You have to be careful with it.

A more interesting result is to estimate how often a delay will occur and how long it last. From the above we know that there is a 99% chance to win a bet on color at least once every 7 roulette spins. Using the same above equations, making algebraic operations and leaving the 99% probability as a base we can then determine how many spins of each color will be repeated.

If we consider that a roulette spin is performed every minute, then we can say with 99% probability that:

-Two numbers of same color will appear consecutively every 17 minutes.

-4 numbers of same color will appear every hour.

-Series of 6 numbers of the same color will occur every 6 hours.

-Once a day, will be 8 numbers of the same color consecutively.

-Every 4 days there will appear up to 10 numbers of the same color.

The analysis presented in Part I of this post can be extrapolated to the rest of roulette bets.

P. S.

You can calculate the probability of winning at roulette every spin, you can also calculate the probability of winning in two or more spins. The theoretical delay for color bet is 7 numbers, and long series of the same color may occur at least once a day. We must be careful and use that information to our advantage.