When the opportunity for a free game appears, do not miss it. This way you will be able to determine the variance of the slot for yourself. Today, as a rule, such an opportunity is offered in almost every casino.
As for the bankroll data, they usually become clear after two hundred spins have already been made. When, when testing the slot, large numerical combinations do not fall out in any way, you can be sure that the variance indicators are extremely low here. The demo mode of the game implies no need to pay for the game and, accordingly, the ability to play without fear of subsequently losing money due to a loss.
Usually, all experienced and professional players started at the time with the free mode and only later, having thoroughly learned the rules of the game, having determined its secrets and capabilities, having gained enough confidence in their own abilities, they moved on to playing for money.
At the same time, as already indicated, it is possible to determine the indicators of variance in this way. For example, you can pay special attention to the frequency of payments made. They can be higher or, conversely, lower than the total rates. Sometimes players lose a certain time in slots, then suddenly luck comes and a big win comes, and then the failures continue again. This indicates high rates of variance.
Choosing a virtual casino to play slot machines for money is a very serious matter, and therefore everything should be considered. Understanding this already significantly increases your chances of subsequent success. Try to try your hand at slots with different levels of variance.