Telling when a machine is “due to hit” is the Holy Grail of the slot world
By Frank Legato
The world of slot machines and other gaming is full of myths, anecdotes and other little hacks that seem to promise us unlimited wealth. While it’s important to bust the myths that slot machines are anything but random, or that casino operators can control them, there are theories as to whether or not we can “predict” a slot machine outcome. Pick slots with the highest “Return to Player Percentage” If you’re looking for slot machines that are most likely to hit, then you want slots that have the highest percentage of RTP.
It’s one of the most-asked questions among slot players: Which machines are due to hit? Or, how do I tell when a machine is due? Or, which machines are the best to play, right now?
These are not only among the most-often questions asked in letters to this and other player magazines; they are questions asked at casinos across the country, to slot attendants and floor managers: “Where are the hot machines?”
Despite all that has been written about the workings of the modern slot machine, there is still a prevailing notion among players that these questions can be answered—that attendants can give you a hot tip on a machine that’s about to hit; that some outward signs visible on a slot game can show that a machine is close to a jackpot.
Helping this notion is the wealth of “slot system” trash available on the Internet and elsewhere, offering “visual clues” to when a game is “about to hit.”
The Internet “systems” are all scams, and the notions about machines being “due” are misguided. The reason is that a slot machine’s computer is constantly selecting new results—results that have nothing to do with what the machine did three spins ago, four hours ago, for the past week or for the past year.
It all comes down to our old friend: the random number generator. A slot machine’s computer contains what is basically a digital duplication of physical reels. Before the early 1980s, the probability of hitting jackpots, and their likelihood on any give spin, was tied to how many symbols and blanks—known as “stops”—were on each physical reel. The old electro-mechanical slots had 22 stops on each reel. By logging the symbols that landed on each reel, it was possible to perform calculations that would give you the odds of a jackpot landing on a given spin.
That all changed, however, with computerization of the process. For casinos, the problem with physical stops was that the odds of hitting the top jackpot could only be as long as the number of stops on each reel would allow. The use of a random number generator allows “virtual” reels—a computer simulation of reels containing as many symbols as the programmer desires. Numbers in the program represent each stop on each reel. If the programmer wants a low-paying or non-paying symbol—say, a blank—to appear more often, it is duplicated in the program so the random number generator selects it more often.
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Thus, instead of 22 stops per reel, you may have 60 stops, hundreds of stops—as many as the programmer wishes, while staying within the odds limits set by the state. This is why odds can no longer be calculated through a formula involving the number of symbols on physical reels. The 22 symbols visible to the player no longer represent the slot machine’s probabilities. They display the symbols that can lead to combinations, but there is no way for the player to know how many numbers correspond to those symbols. The more of them the computer considers there to be on a reel, the more likely it will be selected by the RNG.
The All-Important RNG
The random number generator in a slot machine is just what the name indicates—it is a software program that generates numbers at random, from the list of numbers entered to represent each reel stop. The RNG generates more than a hundred sets of numbers every second, and it generates them continuously, even when the slot machine is idle. This is why each result is independent of every other result on a slot machine. The random generation of numbers is continuous, and no one sitting at a machine can predict which of the numbers the RNG will have generated at the instant you push the spin button.
When you push the spin button, the computer takes a snapshot of the numbers generated that instant by the RNG, and translates it into a reel result. An instant before you push the button, the RNG is generating an entirely different set of numbers; an instant later, yet another set. No one looking at the slot machine can predict the number it will choose next.
This is why a slot machine can never be said to be “due” to hit a jackpot. It is also why those systems you find on the Internet will never work.
One system circulating the Internet says that one can watch for “patterns” on the reels of a traditional-style slot machines for clues as to when the next spin will be a jackpot, and adjust your bet accordingly. Another actually tells the player to watch the reels on a traditional slot machine for wiggling. Bet a single coin until you see the reels wiggle, then bet the max because the wiggle means a jackpot is coming.
These gimmicks are all nonsense. No “pattern” formed by symbols in the pay window—an “X” formed by bar symbols, for instance—is indicative of what will come next. And, “wiggling” reels may mean that the slot machine is old and in need of repair, but nothing else. The physical reels are only there to do what the computer tells them to do. They are display mechanisms. They do the same thing as a video screen—communicate to the player the result at which the computer’s RNG has arrived.
Tips from Attendants
Many players still feel that a slot attendant or other floor person who is in one location all day can tell them which machines are “hot”—in other words, which machines are about to pay off. They will throw the employee a tip to identify a hot machine.
It is a waste of money. Even if a certain machine has been paying off all day, this is no indication it will continue to pay off tonight. A slot machine’s cycles are not predictable.
The only thing an attendant or floor person can give you is historical information. The sole place this historical information may be useful on a slot floor is a progressive bank—one that has been in place in the same location for a long time. The useful historical information an employee can give you here is the level at which the progressive jackpot has hit on that game. If it is substantially above that, other players who are familiar with the link will give that bank of slots more play than normal—the “jackpot fever” phenomenon. Jackpot fever pushes more coins through the game. With more changes for one of those machines to generate the winning combination, it is more likely it will hit.
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More likely, but not guaranteed. And that is the vital part of my message: Even if a progressive is higher than ever before, that doesn’t necessarily mean it’s definitely going to hit soon. It could go higher, and even higher—and wait until well after your bankroll is gone.
Remember the movie National Lampoon’s Vegas Vacation, when gambling fever consumes Chevy Chase’s character, Clark W. Griswold? He goes on a losing streak to beat all losing streaks while his son, Rusty, wins four cars by playing the slot machines. Maybe Clark would have done better if he had read Probability For Dummies! In this article, you discover the basic ideas behind slot machines and how they work, so that you can get past the myths and develop a strategy based on sound probability.
Understanding average payout
When casinos advertise that their slot machines pay out an average of 90 percent, the fine print they don’t want you to read says that you lose 10 cents from each dollar you put into the machines in the long term. (In probability terms, this advertisement means that your expected winnings are minus 10 cents on every dollar you spend every time the money goes through the machines.)
Suppose you start with $100 and bet a dollar at a time, for example. After inserting all $100 into the slot, 100 pulls later you’ll end up on average with $90, because you lose 10 percent of your money. If you run the $90 back through the machine, you’ll end up with 90 percent of it back, which is 0.90 x 90 = $81. If you run that amount through in 81 pulls, you’ll have $72.90 afterward (0.90 x 81 = 72.90). If you keep going for 44 rounds, on average, the money will be gone, unless you have the luck of Rusty Griswold!
How many pulls on the machine does your $100 give you at this rate? Each time you have less money to run through the machine, so you have fewer pulls left. If you insert $1 at a time, you can expect 972 total pulls in the long term with these average payouts (that’s the total pulls in 44 rounds). But keep in mind that casinos are designing slot machines to go faster and faster between spins. Some are even doing away with the handles and tokens by using digital readouts on gaming cards that you put into the machines. The faster machines can play up to 25 spins per hour, and 972 spins divided by 25 spins per minute is 38.88 minutes. You don’t have a very long time to enjoy your $100 before it’s gone!
The worst part? Casinos often advertise that their “average payouts” are even as high as 95 percent. But beware: That number applies only to certain machines, and the casinos don’t rush to tell you which ones. You really need to read or ask about the fine print before playing. You can also try to check the information on the machine to see if it lists its payouts. (Don’t expect this information to be front and center.)
Implementing a simple strategy for slots
Advice varies regarding whether you should play nickel, quarter, or dollar slot machines and whether you should max out the number of coins you bet or not (you usually get to choose between one and five coins to bet on a standard slot machine). In this section, you’ll find a few tips for getting the most bang for your buck (or nickel) when playing slot machines.
Basically, when it comes to slot machines, strategy boils down to this: Know the rules, your probability of winning, and the expected payouts; dispel any myths; and quit while you’re ahead. If you win $100, cash out $50 and play with the rest, for example. After you lose a certain amount (determined by you in advance), don’t hesitate to quit. Go to the all-you-can-eat buffet and try your luck with the casino food; odds are it’s pretty good!
Choosing among nickel, quarter, and dollar machines
The machines that have the higher denominations usually give the best payouts. So, between the nickel and quarter slots, for example, the quarter slots generally give better payouts. However, you run the risk of getting in way over your head in a hurry, so don’t bet more than you can afford to lose. The bottom line: Always choose a level that you have fun playing at and that allows you to play for your full set time limit.
Deciding how many coins to play at a time
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When deciding on the number of coins you should play per spin, keep in mind that more is sometimes better. If the slot machine gives you more than two times the payout when you put in two times the number of coins, for example, you should max it out instead of playing single coins because you increase your chances of winning a bigger pot, and the expected value is higher. If the machine just gives you k times the payout for k coins, it doesn’t matter if you use the maximum number of coins. You may as well play one at a time until you can make some money and leave so your money lasts a little longer.
For example, say a quarter machine pays 10 credits for the outcome 777 when you play only a single quarter, but if you play two quarters, it gives you 25 credits for the same outcome. And if you play the maximum number of quarters (say, four), a 777 results in 1,000 credits. You can see that playing four quarters at a time gives you a better chance of winning a bigger pot in the long run (if you win, that is) compared to playing a single quarter at a time for four consecutive tries.
The latest slot machine sweeping the nation is the so-called “penny slot machine.” Although it professes to require only a penny for a spin, you get this rate only if you want to bet one penny at a time. The machines entice you to bet way more than one penny at a time; in fact, on some machines, you can bet more than 1,000 coins (called lines) on each spin — $10 a shot here, folks. Because these machines take any denomination of paper bill, as well as credit cards, your money can go faster on penny machines than on dollar machines because you can quickly lose track of your spendings. Pinching pennies may not be worth it after all!