A machine that has a 95 percent RTP, for example, should pay out $95 for every $100 wagered. In general, players looking for better odds will favor machines wgame slots 777ith higher RTP percentages. Variability and Volatility: Evaluating Risk Tolerance. The variance or volatility of a slot machine is another crucial factor to take into account. While low volatility slots offer smaller wins more frequently, high volatility slots typically offer larger payouts but fewer wins overall.