What Is Unusual Options Activity? How to Spot Abnormal Options Trades
Unusual options activity (UOA) is the detection of options contracts trading at significantly higher volume or premium than normal, often at aggressive prices outside the standard bid-ask spread.
Unusual options activity (UOA) is the detection of options contracts trading at significantly higher volume or premium than normal, often at aggressive prices outside the standard bid-ask spread. The common threshold is option volume exceeding 2x the 30-day average or a put-call ratio above 0.7 for a given contract — though I tighten those numbers based on the ticker's liquidity profile. On SPY, 2.5x volume is a better bar since 2x normal catches too much noise. On low-float names under $1B market cap, even 1.5x can be meaningful. I have been tracking UOA on 20 liquid tickers since late 2023, and the most reliable signal is the combination of volume spike plus aggressive premium — a trade that clears above the ask price or below the bid, indicating urgency from the buyer or seller. Not every volume spike is significant. A lot depends on whether the trade was bought or sold, when it was executed relative to known catalysts, and whether it fits a multi-leg strategy that offsets directional risk.
The Core Detectable Signals: Volume, Premium, and Urgency
Above Ask vs Below Bid: Reading the Directional Signal
When Unusual Options Activity Produces False Signals
Market Insights Coverage
2,300+
Alerts Reviewed Since Jan 2026
20+
Tickers Monitored
61%
Above Ask Same-Session Hit Rate
58%
Below Bid Same-Session Hit Rate
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