Options Order Flow
Options order flow is the stream of executed option trades, read for who initiated each trade (buyer or seller), with what urgency (sweeps, blocks), and at which strikes - to infer how positioning is building. Aggregated flow is one of the inputs behind dealer-positioning estimates, and one of the easiest datasets to over-read.
The basic read is aggressor side: a trade printing at the ask was probably buyer-initiated, at the bid seller-initiated. Layered on top are urgency signatures - sweeps that split an order across exchanges to fill immediately, and blocks that print as large negotiated trades - plus repetition, when the same strike absorbs consistent one-sided flow across days.
Flow analysis has hard limits. A large call purchase may be one leg of a spread, a hedge against short exposure, or a roll of an existing position - none of which mean what a naive bullish read assumes. Next-day open-interest changes help confirm whether flow opened new positions or closed old ones.
In structural analysis, flow matters less as a directional tell and more as the input that updates the dealer-positioning estimate: persistent one-sided customer flow at a strike implies dealers are accumulating the other side, and their hedging of it is what feeds walls, pins, and gamma regimes.
Frequently asked
Does big call buying mean someone knows something?
Rarely anything so clean. Large prints are often hedges, spread legs, or rolls; flow read in isolation - without open-interest confirmation and context - is one of the most over-interpreted datasets in markets.
What is a sweep?
An aggressive order split across multiple exchanges to fill as fast as possible at the ask or bid - an urgency signature, and one input among many rather than a signal by itself.
Related terms
This term is part of a bigger picture: Gamma Exposure, Explained — the complete guide →