One of the great things about online slots with relatively few symbols on the reels is the fact that they inevitably pay out far more frequently than their more complicated counterparts. So, if you're on the hunt for a slot with low/medium variance then we wholeheartedly recommend you try IGT's Triple Diamond.
Slot machine odds are some of the worst, ranging from a one-in-5,000 to one-in-about-34-million chance of winning the top prize when using the maximum coin play.