Glossary

What Is Options Flow? Definition for Traders & Developers

Options flow is the live (or delayed) stream of individual option trades. the tape. showing where premium is printing across strikes, expirations, and call/put side.

On OptionData, options flow arrives as OPRA-licensed WebSocket prints (~10M+/day) with up to 30+ fields including premium, sentiment, and Greeks, not only end-of-day aggregate volume.

Explore options flow API Stream live trades

How options flow is used

Flow helps desks and apps see aggression and positioning as it happens, then confirm whether patterns repeat in history.

Watch the tape

Each print is a trade with price, size, and contract identity (underlying, strike, expiry, call/put).

Measure premium

Premium (roughly size × price × multiplier) ranks economic significance beyond raw contract count.

Add analytics fields

Greeks and IV on the print help estimate directional vs volatility intent when building scanners.

Validate historically

Replay similar conditions with SQL on stored trades (2.8B+ on OptionData) before automating alerts.

Options flow vs related concepts

Options flow = sequence of trades (prints), often real-time
Volume = summed contracts over a period (daily/aggregate)
Open interest = open contracts, not the same as today’s prints
Unusual activity = flow filtered by rules (premium, sweeps, DTE, etc.)
Option chain = snapshot of quotes/Greeks across strikes at a point in time
API access: WebSocket for flow, SQL for history, REST for chains

Example: summarize today’s flow premium by side

SELECT
  symbol,
  put_call,
  count() AS prints,
  sum(toFloat64(price) * size * 100) AS premium
FROM RawOptionTrades
WHERE date = (SELECT max(date) FROM RawOptionTrades)
  AND symbol = 'SPY'
GROUP BY symbol, put_call
ORDER BY premium DESC
LIMIT 100

Next steps

Move from definition to APIs and workflows with unique product pages.

Options flow FAQ

What is options flow in simple terms?

Options flow is the stream of individual option trades as they occur. It shows which contracts are trading, at what size and price, so traders can infer where money is moving in the options market.

Is options flow the same as options volume?

No. Volume aggregates contracts over a window. Flow is the trade-by-trade sequence (the tape). You can compute volume from flow, but volume alone loses timing and print-level detail.

How do developers access options flow data?

Typically via a streaming API. OptionData exposes OPRA-licensed U.S. equity option trades over WebSocket with filters and analytics fields, plus SQL history for research.

Why do flow tools show premium and Greeks?

Premium ranks economic size; Greeks and IV help interpret whether activity looks directional or volatility-driven. OptionData can attach these fields to qualifying prints and chain snapshots.