What Is an Options Scanner?
An options scanner searches across thousands of option contracts, or the stocks underneath them, and returns the ones that match a set of conditions. Because a single stock can have hundreds of contracts across strikes and expirations, some kind of filtering is almost required.
Three kinds of options scanners
| Type | What it looks for | Good for |
|---|---|---|
| Flow scanners | Unusual volume or large trades in specific contracts | Seeing where big money may be positioning (with plenty of noise) |
| Volatility scanners | High or low implied volatility, IV rank, IV vs. historical volatility | Deciding whether options are expensive or cheap; premium-selling strategies |
| Setup-first scanners | A directional chart setup in the stock, then a matching contract | Swing traders who want the option to express a chart-based view |
Useful filters
- Liquidity: open interest and volume thresholds, and a maximum bid-ask spread as a percentage of the option price.
- Expiration window: for example, 30–45 days to expiration.
- Moneyness or delta: at-the-money, one strike out, or a delta range.
- Implied volatility: IV rank or percentile to avoid overpaying.
- Events: exclude contracts whose life spans an earnings date, if you want to avoid IV crush.
Traps
- Unusual activity isn't a signal by itself. A large call purchase might be a hedge, one leg of a spread, or a closing trade. Flow scanners can't always tell.
- Cheap isn't the same as good value. Far out-of-the-money options look inexpensive but need a large move to pay off.
- Ignoring the underlying. An option is a bet on the stock. If the stock's setup is weak, the contract selection doesn't save it.
Setup-first: a worked flow
- Scan stocks for a clean directional setup (for example, a pullback holding in an uptrend).
- Define the thesis on the stock: entry, stop and target on the chart.
- Pick an expiration that gives the thesis time (30–45 DTE for a multi-week swing).
- Pick a liquid strike near the money.
- Plan the exit on the underlying's stop and target, not just the option's price.
How Zelos uses it
Options Scanner is a setup-first scanner. It starts from the same directional screens as Swing Trader and Breakout Rider, and only when a setup clears the bar does it translate it into a single long call or put idea with a 30–45 DTE window. No spreads, no short options, no 0DTE, no weeklies, and it never connects to an account.
Frequently asked questions
What is the best options scanner?
It depends on your approach. Flow scanners suit people tracking large trades, volatility scanners suit premium sellers, and setup-first scanners suit swing traders who start from the chart.
Do options scanners work for beginners?
They can narrow the choices, but options carry risks beyond stocks, including losing the full premium. Understanding expiration, implied volatility and liquidity comes first.
What is unusual options activity?
Volume in a contract that is large relative to its usual volume or open interest. It can hint at positioning, but it has many innocent explanations.