You don’t. Any site that tells you that you can is lying to you to try and get you to gamble more than you should.
Unlike games like Blackjack that have a memory (cards that have been dealt are put in the discard tray and cannot be played again – this influences the cards that are left to be played), slots games are what are called ‘mathematically independent’. In other words, what happened on the last spin has no impact on what will happen on the next spin.
Many players will look for ‘hot’ or ‘cold’ machines/games, mistakenly believing that if the game has been paying out a lot recently that it is more likely to for them (hot) or that a game can be ‘overdue’ for a win (cold). These beliefs are entirely without basis in fact and fall under the Gambler’s Fallacy.
Setting aside progressive jackpots, a slot game is just as likely to pay out a big win or bonus feature on this spin as it was on the spin before or will be on the spin after. Historic results do not alter in any way the probabilities of any event occurring. Having had a long losing streak on a game does not mean that it is overdue to pay out. Having a big win in a game does not mean that it is less likely to give out another big win.
Progressive jackpots should be considered separately, not because winning the jackpot gets more or less likely if it has/has not been won recently, but because the size of the payout varies over time. You are just as likely to win the progressive jackpot on the spin immediately after it was paid out as you were the spin immediately before it was paid out. But if you win on the spin immediately after the jackpot has been paid out you win far less. As such, if you’re going to play progressive jackpot games – and it should be noted that these games are extremely high variance and as such only for players who are happy to experience long losing streaks – you should wait until the jackpot value of the game is higher than the average payout. There are various resources online that chart this information.
Our strong advice is to avoid any site, service or person that encourages you to think there are any tricks that can make you a winning player. While there are consistent winning gamblers online, these players are utilising promotional incentives in a mathematically efficient way that allows them to gain an edge over the house. They do NOT simply pick ‘hot’ machines or any other such superstitious irrelevance.
The best advice for any regular player is to pick a game with a high RTP figure – this will make you more likely to lose less in the long run – and to be sure that you are comfortable with the likely reality that the casino will come out ahead in the long run. You have to pay for the entertainment after all! Somebody pays for all those lights!