In brief, poker variance is a period of bad luck. It shows how much a player loses (or how much he wins, as on the reverse side of the medal). There is a belief that the ratio is based on luck. The concept can be compared with that of a flipped coin. The coin has two sides. It can fall tails-up or heads-up. There is no other outcome. Thus, the probability is 1 out of 2. If you flip a coin a hundred times, the probability of your winning is 50%, or 50 times. However, in reality, you can win 56 times, for instance. And that will be considered a positive variance. The negative variance is when you win less than the probability (48 times, for instance).