Why it matters
Most options orders rest on one exchange and wait. A sweep does the opposite: it hits every exchange showing size at once, because the buyer or seller cares more about getting filled now than about paying a fraction less. That urgency is the signal. Someone was willing to pay up, across venues, at that moment.
A sweep on its own is a sentence fragment. It becomes readable when you combine it with the other columns on the same row: the side token tells you whether the sweep lifted the ask or hit the bid, the premium tells you how much money moved, and the volume against open interest tells you whether the contract was already crowded before the sweep arrived. A call sweep at the ask, in size, on a contract that had little open interest, is the classic shape of a new bullish position being opened in a hurry.
The Options Flow feed streams every sweep as it prints, and the Exec filter isolates them so you can watch only the urgent orders.
What it does not tell you
- It does not tell you who. A sweep can come from a fund, a market maker rebalancing, or a retail trader with a fast broker. The feed shows the trade, not the account.
- It does not tell you why. A call sweep at the ask is usually a bullish opening trade, but it can also be a buyer closing a short call position, or one leg of a spread whose other leg printed elsewhere.
- Urgency is not accuracy. Sweeps are fast money, and fast money is wrong as often as slow money. The unusual options activity guide walks through the tests that separate a meaningful sweep from noise.
- Small sweeps are common. The label describes how the order was routed, not how large it was. Filter on premium as well as execution type.
What it looks like in the data
At 9:31 am on September 11, 2026, ninety seconds after the open, a buyer swept 1,315 META call contracts at the ask.
Exec: SWEEP. Filled at $16.30 per contract at 9:31:01 am ET with the stock at $651.24. Volume on the contract was 2,446 against 1,146 open interest when the sweep printed. Not a recommendation.
| Column | Value | How to read it |
|---|---|---|
| Exec | SWEEP | Routed across exchanges at once |
| Side | A | Buyer lifted the offer |
| Premium | $2.14M | 1,315 contracts × $16.30 × 100 |
| Volume / OI | 2,446 / 1,146 | Day volume already double the open interest |
| Next-day OI | 5,305 | Open interest rose by 4,159 contracts the next morning |
Read together: an urgent buyer, at the open, in size, on a strike that was not crowded, and the next morning's open interest confirmed that new positions were opened rather than old ones closed. That is what a clean sweep looks like. It says nothing about whether the buyer was right.
