What's Slot Machine

At first glance it seems online slot machines are a 100% game of chance. And they really are, at least in the terms of a single game round. However, that doesn’t mean that you can’t influence your chances by using the right betting strategy and choosing the right game to play. Here is a list of factors that define your slots betting strategy.

Slot machines are the most popular gambling game in most United States casinos, but the number of players who really understand how they work is terribly small.

The purpose of this post is to explain what slot machines are and how they work in language anyone can understand.

Frankly, I think most people who understand how slot machines really work avoid playing them. And I think some of the people who play slot machines and think those games are cheating are daft in their reasoning, too.

If you pay attention to what I’ve written in this post, you’ll know the truth about slot machines.

And when you know the truth, you can make a decision about whether to play as an educated person instead of as a rube.


Modern slot machines are powered by computers and electronic devices, but that wasn’t always so. Understanding how those computers and electronics produce results requires some understanding of the history of slot machines and how they worked in the past.

What makes a slot machine a slot machine is the presence of spinning reels with symbols on them. Early version of slot machines used actual physical reels, springs, and gears to create random results.

On the front of these machines was a window with a horizontal line across it. This represented the “payline.” If symbols lined up and matched on the payline, you won a prize amount.

At first this was money, but eventually, slots were outlawed. Many bar and pub owners replaced the monetary prizes with fruit-flavored candy and sticks of candy to get around the new laws.

The traditional, classic symbols on slot machine reels are still based on those older machines. This is why you find so many slot machines with cherries, apples, and bars on them. (The bars represent sticks of gum.)

The early slot machines used the same strategy to make money in the long run that modern slot machines do. They gave you odds of winning that weren’t commensurate with the payout amount.

This is best explained using some mathematical examples.

Let’s say you have a simple 3-reel slot machine game with 10 symbols on each reel. This slot machine only has 1 winning combination, too, and it costs $1 per spin to play.

There are 1000 possible combinations of symbols on a 3-reel slot machine of that description, but only one of them is a possible winner.
If that winning combination pays off 950 for 1, the casino has a clear advantage, right?

Over 1000 spins, you’ll lose $1000, but on that single winning spin, you’ll win $950 of it back. You’ll lose $50.

That is, of course, a theoretical result based on long-term mathematical expectations. In the short run, anything can and often will happen when you’re playing slots.

And real slot machines are more robust than that. They have more winning combinations with lower prize amounts, but all the prize amounts multiplied by all the probabilities of winning always result in a number less than 100%.

That number is called the payback percentage.


Modern slot machines use the same kind of math and game-play, but instead of using a complicated system of gears and stops, they use computer programs to create the same kind of odds. This has perks for the player, but it has drawbacks, too.

On a traditional mechanical slot machine, the probabilities are straightforward. If you have 10 different symbols, the probability of that symbol showing up on a payline in a spot is 1/10.

With a computerized slot machine, the designers can use any kind of weighting that they want to. One symbol might be programmed to show up 1/20 of the time, while another might be programmed to show up 1/5 of the time.

You have no way of knowing or estimating what the probability is, either.

To make things even more interesting, 2 identical slot machines might have different programming “under the hood.”

You might be playing The Price Is Right slot machines at a casino and be facing a 95% payback percentage.

You might switch to the same game at the same stakes at the machine next to it and be facing a payback percentage of 85%. There’s no way to tell the difference.

This change in the way the games work enables casinos to offer larger jackpots than they would be able to offer otherwise.

But you trade transparency for that.

I prefer to play games where I can figure out how much of a mathematical disadvantage I have.

That’s impossible with most modern slot machine games.

Random Number Generator Programs and Why Slot Machines Don’t Cheat


The computer program that powers these results is called a random number generator. That’s almost always referred to by an acronym of “RNG.”

It’s a simple enough computer program. It’s just a program that continually thinks of numbers—thousands of them per second. When you press the spin or stop button on a slot machine, the computer program stops on one of those numbers.

That number corresponds to a combination on the reels of the machine.

The outcome has been determined by the computer program before the reels stop spinning.

Slot

This doesn’t mean that the machine is cheating. You’re not more likely to lose after a winning streak, and you’re not more likely to win after a losing streak. Every spin of the reels is an independent event.

The difference between the odds of winning and the payout odds for each bet is what creates an edge for the house. Cheating isn’t necessary for the casinos or the slot machine designers.

The math takes care of that for them.

I have a paranoid friend who literally believes the world is flat. He also thinks slot machines are rigged.

He’s wrong about both, but he’s less wrong about the slot machines.

They ARE rigged, mathematically, by providing payouts that are lower than the odds of winning.

What S The Best Slot Machine To Play

But they work honestly in terms of providing completely random results and independent trials. In fact, in any jurisdiction where such games are legal, they’re heavily regulated, inspected, and audited.

Casinos make more money from slot machines than they’d probably make with a printing press that printed new money in that same amount of floor space.

The Difference between Short Term Results and Long Term Expectations


The mathematical examples I’ve used assume you’re interested in predicting results in the long run. That’s the entire point of gambling math as it relates to probability.

But long term expectations have little to do with what happens in the short run.

The long run can be defined as an infinite number of bets. Every bet you place brings you closer to the long run, but you’ll never get there.

The Law of Large Numbers is a mathematical principle that says the more independent trials you run, the closer you’ll get to the theoretical expectation.

In the short term, though, you’re possibly going to win. I’ve seen surveys that showed that roughly 20% of the gamblers at a casino leave with some winnings in their pocket on any given visit. The casinos don’t mind. In fact, they’re counting on it.

Here’s why:

If no one ever won, people wouldn’t play. And without gamblers, casinos make no money and can’t stay in business.

My best advice to someone who’s playing slot machines is to not spend much time in front of them. If you get a reasonable sized win when you sit down, be willing to quit and walk away.

The longer you play, the more likely you are to see results that mirror the long term expectation.

Your goal should be to take advantage of those short term aberrations called luck or deviation. You can’t count on that in any given situation,

but you can count on this:

The longer you play, the more your results are going to resemble the mathematically expected results.
And with a negative expectation game like a slot machine, you’re going to lose all your money if you play long enough. That’s how a negative expectation gambling game works.

What about the Other Bells and Whistles on Modern Slot Machine Games?


When I use the expression “bells and whistles,” I’m talking about features of slot machine games other than the standard 3 spinning reels. Some of these additions and changes are complicated, but some of them are simplicity itself to understand.

One example of a bell and whistle is the number of reels on a slot machine game. Traditional slot machines just had 3 reels, and one of the reasons for that was the size of the reels and the machine that housed them.

The number of symbols also used to depend on the size of the reels—the smaller the reels, the fewer symbols you can print on them.

Additional paylines are another bell and whistle on most modern slot machines. The traditional machine just has a payline horizontally across the center, but modern slot machines have various patterns similar to the various patterns you might use on bingo cards.

They might run diagonally, or they might run in a zig zag pattern.

To activate multiple paylines, you must make multiple bets. Each payline gets activated by a wager, and the payout is based on the combination that appears on that line and the wager on that line only.

On larger machines with lots of paylines, you can win on multiple paylines but still be a net loser. For example, if you bet a nickel on each of 20 paylines, you’ll have put an entire dollar in action. If one of those paylines wins for 50 cents, you’ve still lost 50 cents on the game.

But the slot machine still lights up and shows you the payout as if you were a net winner.

Multiple scientific studies have indicated that the human brain treats these near-miss results exactly the same as they would an actual win, which is one of the things that make slot machines so addictive.

Wild symbols are another example of a bell and whistle on a modern slot machine. If you’ve played cards, especially poker, you are probably already familiar with the concept of a wild symbol.

It’s a symbol that can be used to complete any winning combination. It acts as a replacement for the symbol that you needed to make that combination.

Scatter symbols are a little more confusing, but they’re similar to wild symbols. A scatter symbol is one that doesn’t have to be on a payline to trigger a payoff. You just need enough of those scatter symbols to show up somewhere on the screen at once.

Many times, on a 5-reel machine, you’ll get a payoff if 3 scatter symbols or more show up from left to right. They don’t need to be along a payline or anything like that. They can literally be “scattered” across the screen.

Sometimes scatter symbols and/or wild symbols trigger bonus games or free spins. Free spins are a simple enough concept to understand—they’re just extra spins on the reels that you don’t have to pay for.

On some machines, they’re always winning spins—the only thing in question is how much you’re going to win on each spin.

Bonus games can be more interesting, but they’re almost always entirely random. Often the bonus games involve choosing from a video display of multiple boxes or treasure chests. Depending on which one you choose, you get a prize amount.

There’s no skill involved in these kinds of bonus games.

Slot machine designers are now experimenting with design elements that borrow from video games like Space Invaders, though. If you get a certain number of symbols, you can trigger a bonus game, and the amount you win from that bonus game might depend on how many aliens you can shoot from the skies overhead.

Slot Machine Strategies and Systems Don’t Work, So Don’t Even Bother


If I could teach you only one thing about slot machine games, it’s this:

They’re entirely random. Each spin is an independent event. This means that what’s happened on previous spins has no effect on what’s going to happen on a subsequent spin. Most strategies and systems assume that the previous spins have some relationship to subsequent spins.

I once read an entire book of slot machine systems that were supposed to help you win at slots. The guy who wrote it was a total cornball. I’m not even going to mention the name of the book or the author here.

I will describe what he suggested, though. His first piece of advice was to track how many “naked pulls” you’ve had in a row.
A naked pull on a slot machine is one that results in no winnings at all.

His advice was to switch machines any time you get 5 or 7 naked pulls in a row. (I don’t remember the exact number, but it was something arbitrary like that.)

The idea behind this advice is that any machine which hasn’t paid out in the last 5 or 7 spins must be running cold, so you should find a machine that’s NOT running cold.

And as I’ve already pointed out, slot machines only run hot or cold in retrospect. There’s no way to predict what’s going to happen on subsequent spins based on what’s happened on previous spins. That’s just not how these games work. They’re not programmed to have hot and cold cycles.

He also offered advice about setting loss limits and win goals. This idea has some merit, but not much.

A loss limit is the amount of your session bankroll that you’re willing to lose before walking away from a game. 20% is a commonly suggested number. So if you put $100 in a slot machine game and lost $20, you’d cash out and walk away for that session.

A win goal is just the opposite. It’s an amount that you will win which will signal that it’s time to quit playing. You might have a 20% win goal, too, which means that once you’re up to $120, you’ll call it a day for that playing session.

This can help you avoid having huge losing sessions. It can also help you have book occasional winning sessions.

What it doesn’t do is change the odds in your favor in any way. In the long run, you should think of playing slot machine games as one long game that lasts for the rest of your life.

Eventually the odds are going to even out to a point where you see the kind of results the math would predict, regardless of what happens during those individual sessions.

I’ll confess that when I play slot machines, I do use a variation of this strategy. My loss limit, though, is always 100% of the amount I put in the machine. I either want to hit my win goal or lose all my money trying.

That’s as effective as any other loss limit, but people never suggest that.

Raising and lowering the sizes of your bets don’t change the odds on the machines, either. Don’t pay attention to any advice which suggests otherwise.

Other Lame Pieces of Slot Machine Strategy Advice You’ve Probably Heard (Or Will Hear)


One of my favorite pieces of advice from slot machine gurus is to try to find loose slot machines on the ends of the rows of slots at the casinos.

The idea is that the casino managers put the loose machines there to attract more customers.

I doubt this was ever true, but it’s old advice that’s been repeated for years. I’d be surprised if you could find a casino manager or a slots room manager who would confirm that this is really true.

You’ll find superstitious types who believe that playing with you slot machine card inserted is also a mistake. They think having the card inserted makes it impossible to win.

They don’t understand how the computer programs in question work at all. They’re not connected. The random number generator determines the results of each spin. The card reader just tracks how much money you’ve put into action.

The 2 have no relation to each other.

In fact, it makes no sense that a casino would want to discourage you from using the card reader. They have a slots club for a reason—they want to encourage people to play at their casino.

In the long run, the math behind their games ensures them a healthy profit. They count on a percentage of their gamblers going home a winner.

They also want their gamblers to take advantage of the free stuff they’re earning with their slot machine club cards, because that means it’s working. It’s motivating them to play more.

Why Almost Every Other Game in the Casino Is Better than Slot Machines


The traditional way that gambling experts measure one casino game against the other is by comparing the house edge. The higher the house edge, the more the casino expects to win over time on average for each bet you place.

Slot machines generally have the highest house edge in the casino. Some of them might be exceptional, but you have no means of comparing them, because a slot machine is like a black box. You put money in and get money back.

Compare that to a video poker game, where you can calculate the payback percentage based on the probability of getting specific poker hands against the payout for those hands.

Best Slot Machines At Casinos

Since those games use a 52-card deck to determine your probabilities, it’s a simple enough matter to compare one video poker game to another.

Table games make it even easier to compare house edge figures.

But even if a slot machine had the same house edge as all the other games (or lower), it’s still one of the fastest-playing games in the casino. An average slot machine gambler makes 600 spins per hour.

This means slots players are putting more money into action and losing more money over time as a result.

Finally, slot machines are proven to have an addictive effect on the human brain. Addiction is bad. Alcohol can be fun. Some drugs can be fun, too.

But addiction takes something that would otherwise be fun and turns it into something that’s NOT fun.


What

Slot machines are the most popular games in the casinos, but that’s only because most gamblers are stunningly ignorant of how they work. You don’t have that excuse any more.

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Introduction to Choosing Slot Machines

Once a specific casino has been determined to currently be the best of any available, choosing slot machines becomes the next step towards making a profit at slots.

Remember, statistics supplied to state gaming commissions show that the odds of winning are, on average, somewhere around 90%. By assessing all available casinos, then selecting the best possible, you’ve already improved your odds of winning – perhaps by several percentage points.

Whatever your gambling goals are, we’ll talk about those in the next step Identifying Gambling Goals. For now, we need to consider choosing slot machines that will most likely improve our overall odds even more.

So, we’ve walked into our best casino to choose slot machines with the highest odds of winning we can find. How do we select a good slot machine? Most people don’t – they dive right in without much of a plan. Well, we have a plan.

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Why? Because everybody says it’s all about luck. If you pick wrong, “Well,” they say, “better luck next time.” Remember, casino employees are trained to say things like that. If you’d won a jackpot instead, you can believe they would have said, “You’re lucky! I’ll see you later when you win another jackpot!”

Slot attendants have a job to do, and it most certainly isn’t to get you to leave when you should. And, it’s difficult to not to influenced by such comments. But, try not to be.

In the following sections, I’ll briefly explain the following aspects of choosing slot machines:

  • How odds are set within a slot machine
  • Choosing denomination and maximum credits based on bankroll
  • Basics of reading a slot machine’s paytable
  • A simple way to use paytables to pick the best machines, and avoid the worst

Two Separate Odds of Winning

The odds of winning for a slot machine is a limited number of settings from the manufacturer. Besides understanding limited settings are available, it may help to understand that slot machines have two odds of winning to determine:

  • If a player will or will not win anything
  • How much that win will be, i.e., the jackpot amount

Why is understanding these two types of odds significant when choosing slot machines? Because winning slot machines come in all jackpot sizes. You’re still winning if you’re getting enough small jackpots that your bankroll isn’t shrinking. Even if it is slowly depleting, the bankroll can last quite a bit longer, so that’s also a winning slot machine.

Winning many jackpots this way is bankroll cycling. It may not seem very satisfactory, but whether it does or not depends entirely on what your gambling goals are. One type of gambling goal, earning maximum complimentary gifts, is most often achieved via bankroll cycling.

Another point about setting slot machine odds is, how often they change? Of course, it depends on the age of the casino, as discussed in the previous step Assessing Casinos for Success, or if it’s been renovated lately.

In my experience, older-style casinos change their slot machine odds every 7-10 days. Newer-style casinos can change their slot machine odds whenever the machine has been idle for 15 minutes or more, without a players club card inserted or the machine temporarily locked by a slot attendant.

Matching Bankrolls to Denomination/Credits

Only you can decide how much bankroll you want to risk gambling. I highly recommend bringing only as much money you can safely afford to lose comfortably.

Bankrolls quite literally determine which slot machines you can play. But, there’s more to it than understanding a $100 bankroll lets you play a 1-credit, $100-denomination exactly once, with very, very little chance of winning.

Whatever bankroll you have limits which slot machines can be played and how much it can be played. Slot machines have denominations ($0.01, $0.25, $1, $5, $10, etc.) and the maximum credits that can be placed in a single bet.

Slot machines typically must run for a while before wins become more likely. Yes, wins can occur at the first press of a button. They can also happen within the first few bets, where casinos offer a taste. But, usually, they need to run for a while.

About 100-120 bets is the right amount to be prepared to play to determine if you’re sitting at a winning (or breakeven) slot machine. Yes, be careful initially, perhaps making as few as 20 bets, to determine if it happens to be a “bad” machine. Trust your instincts!

If it is a poorly performing machine, a “tight” slot machine, it won’t pay out anything at all. Quick decisions are necessary here, so limited betting gives a clue to its performance, yet still leaves enough to gamble with on another machine if it isn’t – assuming you stop playing it as soon as you notice it’s not performing well enough.

So, again, you determine how much bankroll you can afford to spend. Now, take that number and divide it by 120 bets. If your bankroll is $60, then that’s 50 cents per bet. In such a way, the right choice is a 2-credit, quarter-denomination slot machine. Or, a 50-credit, penny-denomination slot machine.

Always remember to play maximum credits for the highest odds of winning. Meaning, your casino may not have a 2-maximum-credit quarter or 50-maximum-credit penny machines. But, perhaps they have a 1-maximum-credit quarter or less-than-50-maximum-credits penny machines. Such slot machines would provide more than 120 bets of play, which is going in the right direction!

Reading a Slot Machine’s Paytable

When choosing a slot machine to play, a crucial aspect of winning is to review its paytable before playing. Frankly, the casino industry gains an advantage over players that don’t read slot machine paytables.

Located somewhere on a slot machine is one or more tables showing the number of credits won if specific combinations of reel symbols appear in the pay line after the player makes a bet. Below is a relatively generic example of a paytable.

The figure shows reel combinations along with their jackpot depending on the number of credits bet. Paytables don’t typically explain how much credits are worth. In general, the top row is the maximum jackpot of the machine.

Not every reel combination and its associated jackpot are usually shown in a paytable. Other reel combinations not shown in the top rows are also presented in the paytable area. Slot machines with WILD symbols can represent it with a myriad of other possible reel symbols.

A final element of paytable example provided is specific information on winning reel combinations, which can include an indication of how the slot machine operates during play. The bottom row of symbol explains that that slot machine has reel symbols which will move after the reels stop momentarily.

Such additional features may not activate until the maximum credits are bet. It can sometimes be difficult, or impossible, to determine this. Most slot machines with bonus rounds will provide at least some information about it within its paytable.

Free Slot Machine

Developing a habit of reviewing and studying a slot machine’s paytable can help improve your ability to judge the financial risks involved with playing that slot machine.

How to Avoid the Worst Slot Machines

The best way to improve the odds of winning via slot machine gambling is to stop making “sucker bets”. In less colorful language, avoid playing slot machines with terrible odds of winning.

First and foremost, understand when choosing slot machines that there are indeed terrible slot machines at a casino. By merely avoiding them whenever possible, on average, your long-term gambling return will improve. Each time we raise our odds like this, we’re pushing closer to achieving our gambling goals. So, let’s make sure we do that, shall we?

Calculate this “Goodness Ratio” as follows:

  1. When choosing slot machines, as discussed above, find the paytable with the denomination and maximum credits that best matches your available bankroll.
  2. Take a close look at the paytable. What is the maximum possible jackpot when maximum credits are bet?
    • If the top jackpot is displayed in currency, divide it by both the denomination of the machine and the maximum credits
    • If the top jackpot is displayed in credits, divide it by only the maximum credits

This “Goodness Ratio” tells us how worthwhile a specific slot machine is to play relative to others. By using this approach, any slot machine can be compared to any other slot machine.

Slot Machine For Sale

Example: In the paytable above, the maximum jackpot is 2,400 credits with three maximum credits. Therefore, its Goodness Ratio is 2,400 / 3 = 800.

Repeat this calculation for slot machines of interest. While this Goodness Ratio will be similar for many slot machines, it can be startling to find “sucker bet” slot machines that might not otherwise be avoided.

Summary for Choosing Slot Machines

Machine

After a casino has been chosen, it’s time to select candidate slot machines most likely to result in a relatively high-value win. The size of your available bankroll, whatever it is, is an essential factor in this selection process. The bankroll size needs to be matched to the slot machine’s denomination and the number of maximum credits.

Here, we’ve also discussed how slot machines calculated odds twice: once to determine if you’ve won, and again to determine how much you’ve won. Another critical aspect discussed to improve a player’s performance was the basics of reading a slot machine’s paytable.

Finally, we talked about the “goodness” ratio to help select candidate slot machines and, perhaps critically important when improving our odds of winning, knowing precisely which slot machines must be avoided.

Next Steps

The next step on your journey to improving slots performance is Identifying Gambling Goals. Enjoy!

My research indicates I’m the first to share this information and offer personal coaching for slots enthusiasts.

I sincerely hope you find it both enjoyable and useful. For questions, call my voicemail hotline at 702-90-SLOTS, email me at Jon Friedl, or reach out to me through social media:

Further, I suggest that you sign up for my Free Report on the Best 7 Online Resources for Gamblers. Not only will you immediately receive a great list of online resources, but also other tips, tricks, and slots-related articles as I post them.

For the foreseeable future, this email subscription is my only request of you:

Finally, to provide further assistance if needed, I’m offering inexpensive, 50-minute-long, one-to-one Personal Coaching Sessions with me, your fellow slots enthusiast and friendly slot machine expert. Let’s talk! With only a dozen openings available most weeks, this is a strictly limited opportunity!

Have fun, be safe, and make good choices!
By Jon H. Friedl, Jr. Ph.D., President
Jon Friedl LLC