Halloween special: luck or superstition? 13 casino beliefs put to the test

Friday the 13th, a lucky number, a roulette wheel that is “heating up”, a seat nobody wants to leave after a big win: the casino is ideal ground for superstitions. Randomness naturally produces surprising streaks and our brains dislike events without a story. They look for causes, signs and patterns — even when outcomes are independent.

For Halloween, here are thirteen beliefs that often come up around casino games. Some are amusing and harmless. Others can lead to costly decisions if they are confused with real probabilities.

1. “Red has come up five times: black has to be next”

This is probably roulette’s best-known superstition. After a long run of red, black seems “overdue”. Yet on a balanced roulette wheel, the next spin has no knowledge of the history.

With European roulette, a bet on black still has 18 chances out of 37 of winning on the next spin, whether the previous five spins were red, black or zero. A past streak may be unlikely as a whole, but once it has happened, it does not change the next draw.

This bias has a name: the gambler’s fallacy. It is the casino’s most persistent statistical ghost.

2. “A number that has not appeared for a long time is due”

Same logic, straight-up-number version. If 17 has not appeared for one hundred spins, its probability on the next spin remains 1/37 on a European roulette wheel.

Displaying “hot” and “cold” numbers can make the history very visible, but it remains descriptive. It tells you what has just happened, not what will happen.

3. “A hot number is more likely to keep going”

The opposite superstition also exists. Instead of believing in a catch-up, people believe in the streak. Three recent appearances of 32 can make it feel as though it is “on a roll”.

In an independent game, the reasoning is just as wrong. The psychological effect comes from the fact that short streaks are highly memorable. An ordinary number that appears once disappears from our attention; a number repeated three times immediately becomes a story.

4. “Changing tables can break a bad streak”

Changing tables can be useful if it allows you to take a break, slow down or choose more suitable betting limits. But it does not “reset” luck.

A bad streak is not a property that sticks to your account or your seat. If two tables use the same rules, changing screens does not create a special probability in your favour. The best reason to change is ergonomic or budget-related, not mystical.

5. “The dealer can aim for a zone of the roulette wheel”

In casino folklore, some dealers are said to have a “signature” and be able to send the ball into a particular area. On a regulated table, the outcome must remain random and the mechanism is not designed to allow the dealer to choose a number.

Watching a dealer’s motion can be part of the live atmosphere, but turning it into a predictive system means attributing a level of precision that is not the principle of the game.

6. “At blackjack, another player’s bad decision stole my card”

The scenario is classic: the player to your right draws a card “they should not have taken”, receives a 10, and the dealer then gets the card that gives them 21. It feels as though the other player’s decision ruined the table.

It did indeed change the order in which the cards were dealt. But nobody knew that order in advance. If the other player had stood, the 10 might have hurt or helped you later. Judging the decision solely from the card that appeared afterwards is hindsight bias.

7. “A machine or Dice Game has to give back what it took”

This is a modern version of the idea of a “debt”. After several losses, some players feel that the game must soon compensate.

RTP is not an individual bank account. A theoretical RTP of 96% does not mean that after losing €100, the game must return €96 to the same person. It is calculated over a very large number of games and creates no personal debt.

8. “Increasing the stake after a loss lets you recover”

The martingale and its variants are based on this intuition. After a loss, the stake is increased so that a future win repays previous losses.

The problem is twofold: the unfavourable streak can last longer than expected and the stakes grow very quickly. A 1-2-4-8-16-32 progression already represents 63 units committed in six steps. Table limits and the actual budget eventually interrupt the progression long before the mathematics of the game changes.

9. “My lucky number is better than another one”

7, 8, 13 or a birthday date can have personal meaning. In roulette, that does not give them a special probability.

Choosing a number because it means something to you can make the game more fun. The problem only begins when that preference is turned into a probabilistic belief. On a balanced European roulette wheel, every straight-up number has the same probability of 1/37.

10. “Playing at a certain time changes the odds”

Midnight, 11:11, Halloween night or just after the casino opens: times lend themselves perfectly to rituals.

For an RNG game, the time has no predictive role in the outcome of a round. For a live game, the time can change attendance, table availability or the human pace, but not transform the mathematical rule of a bet.

11. “After a big jackpot, the game goes cold”

A jackpot that has just been won may indeed reset if its mechanic is progressive. That changes the amount available, not necessarily the probability of each combination in the main game.

You need to distinguish “jackpot value” from “probability of winning”. A counter that has returned to its starting amount may make the jackpot smaller, but that does not automatically mean that all the other game features will pay less.

12. “Always making the same move brings luck”

Clicking three times, waiting five seconds, always choosing the box on the left: these rituals create a feeling of control. Psychologically, they can be reassuring because they make the situation repeatable.

In a random mechanism, the gesture does not influence the draw unless the game explicitly states that the decision chooses between already determined outcomes or different options. The ritual therefore has emotional value, not probabilistic value.

13. “I feel that this is the right moment”

Intuition is useful in many areas where experience accumulates around real signals. In an independent game of chance, it runs into a problem: there is no observable signal that allows the next result to be known.

After a win, intuition can become euphoric; after a run of losses, it can become an urge to win the money back. In both cases, the feeling of certainty comes more from emotion than from new information.

Why our brains love casino superstitions

Pure randomness is uncomfortable. A run of eight reds seems “too organised” to be accidental, even though a truly random sequence naturally contains streaks. Our brains are excellent at spotting patterns, even when those patterns are not predictive.

Three mechanisms explain many superstitions. Confirmation bias makes us remember the times when our ritual “worked”. Hindsight bias makes us believe that an outcome was obvious once it is known. The illusion of control makes us overestimate the effect of our actions on a random system.

Are superstitions necessarily bad?

Not if they remain folklore. Wearing a lucky bracelet or choosing your birthday number can be part of the fun, as long as you know it does not change the odds.

The useful boundary is simple: a superstition becomes problematic when it encourages you to increase the stake, extend the session, chase a loss or ignore a limit set in advance. At that point, it is no longer a small amusing story; it starts to guide financial decisions.

The Halloween test: superstition or real information?

Ask yourself three questions. First: is this information stated in the game rules? Second: does it actually change the number of possible outcomes or the payout? Third: would it still be true if I had not seen the previous results?

If the answer is no to all three questions, you are probably facing a statistical ghost.

FAQ - Superstitions and casino

Do hot numbers exist?

They exist as a description of the history, not as a guarantee for the next spin.

Does a long streak make the opposite result more likely?

No, not in a game where the rounds are independent.

Can lucky charms influence an RNG?

No. They can have personal or playful value, but they cannot change the result generator.

Why do some superstitions seem to work?

Because we remember coincidences that confirm our belief more easily than the many times when nothing special happens.

What is the best protection against these biases?

Know the rules, set a stake and a duration in advance, and judge a decision based on the information available before the result — not afterwards.