Variance

Slot variance is another important statistical measure. Combined with RTP, it can help you find the best online slots.

Variance

Another word for variance is a standard deviation. This is a number that says something about the expected return from several game rounds compared to the theoretical Return To Player. When it comes to casino games, it is not provided as a number, but rather as low, medium, and high variance.

Pros

  • Useful to find the best slots
  • Gives information about expected return in the short run

Cons

  • Can be difficult to find

How To Use Variance

Variance is very useful to understand both Return To Player and to find the best online slots. In the picture, you can see two different samples. You can think of these as results from spins on a slot.

Both populations, the red and the blue, has an average of 100, but as you can see, the results are very different. The blue sample covers any outcome from 0 to 230, while the red only covers outcomes from 55 to 120.

So how does this translate to online gaming and high RTP slots? The picture is very useful to understand the outcome from a low variance slot and a high variance slot. In this picture, the red sample shows the outcome from a low variance slot. The blue sample shows the outcome from a high variance slot.

When you understand this concept, it will be easier to find online slots that you will enjoy. Let us say that you prefer online slots where you get a lot of wins when playing. Then you should go for a low variance slot. The outcome of your wager is likely to be close to the slots Return To Player.

If you rather want to have a chance to win big, you should go for a high variance slot. But, remember, as you can see from the image, chances are that you can end up losing it all. In other words, it is likely that you will get a return that is not close to the Return To Player.

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Variance & Slot Strategy

First of all, slot variance can be used to find slots that are likely to give you better gaming experience. You can easily find slots that are likely to give you a lot of wins or a slot that will give you the chance to get one big win.

This knowledge can also be used as a strategy when wagering a casino bonus. If you have a low wagering requirement, you can choose a low variance slot as this online slot is likely to give you a return close to the RTP. This is a way to play it safe. You can also do the opposite, and choose a high variance slot. Chances are that you will not manage the wagering requirement, but if you get one big win, you can still make it.

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Variance & High RTP Slots

High RTP slots are known as some of the best online slots. That is something that a lot of players know. But, when it comes to slot variance, most players do not know about this concept.

We think of this as just as important as the RTP. Especially since this measure says something about the Return To Player in the short run.

If you are wagering €10 on a 99 % RTP slot, the expected return is €9.9. But, now as you know about deviation, you will understand that it is not that simple.

If you are playing on a 99 % RTP slot with a low deviation, you know that you are likely to get a return that is close to the RTP.

But, if you wager your €10 on a 99 % RTP slot with high deviation, you know that it is less likely to get a return close to the RTP.

Slot Variance FAQ

What is slot variance?

Slot volatility is a statistical measure telling you something about how big a chance you have to get a return close to RTP.

What slots are best, low or high variance slots?

It depends. If you prefer slots paying out lots of smaller wins, you should choose a low deviant slot. If you want to have a chance to win big, you should choose a high deviant slot.