Unusual Options Activity (UOA)

Unusual Options Activity (UOA) is when options—contracts that give you the right to buy or sell a stock at a set price—trade in volumes or patterns that are way higher than normal. You'll see traders talking about it on research sites and social media because it can signal that someone with insider knowledge (or a big bet) thinks a stock is about to make a big move. It matters because retail investors watch for these signals as potential trading opportunities. For example, if call options (contracts betting a stock will go up) suddenly spike in volume on TechCorp before an earnings announcement, that's UOA worth noticing—though it's never a guarantee of what happens next.