No, there is no way to predict when a slot machine is going to hit a jackpot or to determine which machine is going to be lucky. Slot machines are programmed to use a random number generator (RNG) to determine the outcome of each spin, and the RNG generates random and unpredictable results.

Jackpots slots  more commonly known as progressive jackpot slots  are quite different. Their jackpots are progressive (in that they shift) and are not fixed at all. Instead, every time a player makes a bet the jackpot increases in size.