These are three statistics commonly used within online slots. Variance is the projected payout deviation for slot players over the long term. Slot variance is usually high, medium, or low. Volatility is primarily about how often and how big a player wins, usually over a shorter period than variance (but still thousands of spins). Slots have high, medium, or low volatility. The percentage return on wagers over time is known as the Return to Player (RTP). The RTP percentage for slots is normally 94%-98% with 96% being the current market average.