Reading today’s session…
Unusual options activity updated every trading day
Spot unusual options activity while it’s still building.
Xeros reads every US options chain after the close and ranks the contracts whose open interest keeps climbing, session after session — the positions traders are adding to, not one-off prints.
- Contracts read per session
- 1.7M+
- Stocks & ETFs covered
- 5,300+
- Price during early access
- $0
All of today’s builds →
§01The signal
Big trades make noise. Open interest makes the move.
A single print
A 5,000-contract sweep hits the tape and lights up every flow feed. But it might be closing an old position, hedging a book, or one leg of a spread — and by tomorrow it can be gone.
An open-interest streak
Open interest only rises when new contracts are opened and held overnight. When it climbs on one strike session after session, someone is building a position — and is still adding to it.
§02The product
Six ways to read the build.
- 01
Open-interest screener
Filter every listed chain by ΔOI, build multiple, volume/OI and unusual stock volume — over any window you choose.
ΔOI ≥ 1,000× ≥ 2Vol/OI ≥ 0.5AAPL 345C +2,940 1.37× - 02
Earnings positioning
Every upcoming report, next to the open interest traders stacked into the chain before the print.
MonpreTuepostWedpostThupre - 03
Crypto unusual
Perp open interest, funding and volume anomalies across 24/7 markets, scored against each coin’s own baseline.
BTC-PERP1h +3.1σ4h +2.2σ24h +1.4σ - 04
Daily leaderboard
Today’s biggest open-interest builds, sector call/put flow and a market-wide heatmap.
- 05
Sentiment read
A bullish-or-bearish read of a symbol’s whole chain over your window, explained factor by factor.
BearishBullishBeta - 06
CSV export
Any result set, straight into your own spreadsheet or model — the export always matches the table.
xeros-screen.csvsymbol,type,strike,expiry,oi_change,…
§03The session
Built around the trading day.
The close
The session ends. Volume is final; open interest settles overnight.
Stock volume
Underlying volume and its 10-day and 1-year averages land, powering the unusual-volume filter.
First read
Every options chain is pulled — strikes, expiries, volume — for every optionable stock and ETF.
Settled open interest
Chains are read again before the open, after open interest updates, and every streak is re-ranked.
The open
Today’s builds are waiting for you before the opening bell.
§04FAQ
Questions, answered.
What is unusual options activity?
Unusual options activity is trading in a contract that is far outside its normal pattern — much more volume, or much more open interest, than that strike usually sees. It often marks a trader positioning ahead of an expected move, a hedge, or an event like earnings.
What is open interest, and why does it matter?
Open interest is the number of option contracts that are open and not yet closed. Unlike volume, it only rises when new positions are opened and held overnight. When open interest on one strike climbs session after session, someone is building a position — which is the signal Xeros is built around.
How is Xeros different from options flow trackers?
Flow trackers alert on individual large trades as they print, but a single print can be closing an old position, a hedge, or one leg of a spread. Xeros tracks open interest instead, and ranks the contracts where it keeps rising day after day — positions that were opened and are still being added to.
How often is the data updated?
Every trading day. Options chains are read after the close and again before the next open, once open interest has updated overnight, so the screener always reflects the latest completed session.
Which stocks and ETFs does Xeros cover?
Every optionable US stock and ETF — more than 5,300 symbols, and over 1.7 million contracts read each session.
Is Xeros free?
Yes. Xeros is free during early access. The daily leaderboard needs no account; the screener, earnings and crypto tools need a free account.
Is Xeros investment advice?
No. Xeros provides market data and analytics for informational purposes only. Options involve risk and are not suitable for all investors.
Watch it build.
Free during early access. Make an account, run your first screen, and see what’s stacking up today.