The Multi-Leg Option Trade Screener lists the large option spreads traded in US stocks and ETFs each day, such as call spreads, put spreads, calendars and iron condors. It puts the separate legs of each spread back together, shows what the spread cost, and the next morning shows whether it opened, closed or rolled a position.
What it is
When a trader buys a call spread, the exchange tape shows two unrelated-looking trades: a call bought at one strike and a call sold at another. The screener recognizes that those prints belong to one order and shows them as a single spread, with its strategy, legs, size and net price.
It lists every recognized spread of 200 or more contracts, usually between 7,000 and 10,500 of them a day.
Why it matters
A large spread says more than a single option trade. The strikes and expiration show the price range and the date the trader has in mind, and the net price shows how much they paid for that view. Big spreads in a stock are often the clearest sign of how large traders are positioned before earnings, after news or into an expiration.
The filters: pick a date, describe what you want in plain English or set the filters yourself, and save the screen as a preset.The results, largest first (top 5 of the day shown, member view, Oct 20, 2026). Open + on a row shows its fills and history.
What you get
Every spread of 200 or more contracts, with its strategy recognized: call and put spreads, calendars, diagonals, iron condors, ratio spreads, spreads tied to stock and more.
The size (contracts across all legs), the number of fills, and the times of the first and last one.
The net price, the bid and ask at the time, and % to Ask, which shows whether the buyer paid up or the seller took the bid.
Opening, Closing or Rolling, confirmed from the next morning's open interest on every leg.
History: whether the same spread traded on earlier days (H:n), and whether a position is being added to (Bld Up).
Filters for size, strategy, expiration, earnings or dividends before expiration, sector, market cap and your watchlist, plus a box where you describe the trades you want in plain English.
What makes it different
It works with whole spreads, not single prints.
It checks every leg's open interest the next morning, so you know whether a spread opened a new position instead of guessing.
It connects trades across days: the same spread opened again, a position rolled to a later month, a roll after a roll.
You can ask for what you want ("biggest put spreads today") and it sets the filters for you.
What people use it for
Understand market positioning and open interest
See where large traders are adding or taking off exposure, by strike and expiration, and which positions are being built up or rolled.
Open Interest filter, H:n (Bld Up), Rolling labels
Study the structures big traders choose: which strikes, how wide, how far out, and what they paid. Use them as templates to research, not signals to copy.
Compare each spread's fills with its bid and ask to see whether the buyer paid up or the seller gave ground, and how large orders get filled across the day and across exchanges.
% to Ask, Trade Price vs Bid Ask, Details: every fill and its exchange
Find spreads that span an earnings report, an ex-dividend date or a company event, very short-dated or long-dated trades, or only the stocks in your watchlist, an ETF or a sector.
Earnings, Ex-Dividend, Company Event, DTE, In Watchlist, In ETF, Sector
Spot spreads that are unusual for the stock: unusually large, half or more of its option volume that day, or traded aggressively over and over. See which ones opened brand-new positions.
Indicators: Unusual size, Unusual % share, Unusual aggressive, New (N)
From list: In ETF: only the holdings of one ETF, such as S&P 500 stocks with SPY.
Pricing and execution: Contracts, Trade Price, Trade Price vs Bid Ask, % to Ask
Open Interest and Indicators: Opening, Closing, Rolling, New, History, build-ups, unusual trades
Duration: DTE Near and Far Expiration
Events: Earnings, Ex-Dividend and Company Event before expiration
From list and underlying: In Watchlist, Stock Screener, Market Cap, Stock Type, Sector, Industry
Quick start
Pick the Report Date: today, or an earlier day to see confirmed Opening and Closing labels.
Choose a Spread Type, or type what you're looking for in the box at the top.
Sort by Contracts, then open Details on a row to see its fills and history.
Looking for call spreads to place yourself? This screener shows the spreads other traders placed. To find call spreads to trade, ranked by cost and payoff, use the Bull Call Spread screener (Screeners › Vertical Spreads).
One order that buys and sells two or more options at the same time, such as a call spread (buy one call, sell another at a higher strike). The legs are filled together at one net price.
How do you know whether a spread opened or closed a position?
From the open interest the next morning. If it rose on every leg, the spread opened new positions; if it fell on every leg, it closed them; if it fell on one and rose on another, it rolled.
Can I see who placed the trade?
No. Exchanges don't publish who traded. The screener shows what traded, how much, at what price, and what it did to open interest.
How current is the data?
Spreads appear during the trading day as they are recognized. The confirmed Opening, Closing and Rolling labels are added the next trading morning.
