Sweep (options sweep order)

A sweep is an options order that gets broken into pieces and routed across multiple exchanges at once so the whole position fills as fast as possible, rather than waiting at one exchange for size to become available. The mechanism itself is what defines a sweep. It's an execution style, not a strategy or a directional bet by itself. A trader, or an algorithm on their behalf, chooses to sweep specifically when getting the position on immediately matters more than getting the single best price across every exchange. It's an execution style, not a strategy in itself.

Treat a sweep as a signal of urgency. Someone paid up, in the form of slightly worse average pricing, to guarantee immediate execution rather than resting a limit order and waiting. That urgency means more when it's paired with other context: a sweep in short-dated, out-of-the-money options ahead of a known catalyst reads very differently from a sweep in long-dated, at-the-money options as part of a routine institutional hedge. Size relative to the option's own typical volume matters too. A sweep that's a small fraction of daily volume in a name is far less notable than one that dwarfs it.

A sweep tells you urgency, not conviction or correctness. Someone paying for speed can still be wrong, hedging an unrelated position, or one leg of a multi-leg strategy that looks directional in isolation but isn't. It also doesn't tell you who placed it. Sweeps come from retail traders using modern brokerage routing just as often as from institutional desks. A single sweep, however large, is one data point in what the platform classifies more broadly as unusual options activity. It's the pattern across many prints in a name, not any individual sweep, that tends to matter more.

Picture a $2.4 million sweep of weekly calls in a mid-cap name two days before its earnings report, executed across four exchanges within the same second to get the full size filled before price could move. That combination, urgency, short-dated options, and a specific known catalyst just ahead, is the classic profile that gets tagged and watched closely. Now compare a $2.4 million sweep in the same name's calls dated eight months out with no nearby catalyst. Same dollar size, same execution mechanism, but a much less time-sensitive signal, since there's no obvious event the urgency is racing against.