API TraderAPI QuantAPI DeveloperRequires options add-on
One row per session summarizing the options flow on one underlying: how many sweeps, blocks and large prints, how much premium, how much of it the buyer or the seller initiated, and the ORTEX directional flow score.
Use from_date and to_date to select the US/Eastern sessions (at most 92 days per request).
Available Data Points:
- Trade Date: The US/Eastern session the row summarizes. (
YYYY-MM-DDformat). - Prints: Options flow prints on the underlying in the session.
- Premium USD: Total premium of those prints, in US dollars.
- Sweeps: Prints classed as sweeps.
- Blocks: Prints classed as blocks.
- Large: Prints classed as large.
- Unusual Sweeps: Prints classed as unusual sweeps.
- Buyer Premium Pct: Share of premium that printed at or through the ask (buyer initiated).
- Seller Premium Pct: Share of premium that printed at or through the bid (seller initiated).
- Mid Premium Pct: Share of premium that printed inside the quote.
- Bullish Premium Pct: Share of premium with bullish sentiment: calls bought and puts sold.
- Bearish Premium Pct: Share of premium with bearish sentiment: calls sold and puts bought.
- ORTEX Bullish Premium Pct: Share of premium whose break-even was above the underlying's price at the print.
- ORTEX Bullish Prints Pct: The same share counted in prints rather than premium.
- ORTEX Flow Score: The ORTEX directional flow score, -100 (bearish) to +100 (bullish).
How the shares and the score are built
The buyer, seller, mid, bullish and bearish shares are taken over the premium of the prints that have the quote at execution, which is held from the 19 October 2026 session; earlier sessions report them as null. The ORTEX flow score signs every print by its payoff direction against the underlying: its break-even versus the underlying's last price in the 20 minutes before the print (the print's ortexBetDirection on the Options Flow endpoint). The bullish share of premium and the bullish share of prints are combined and re-centred on zero, then damped where the evidence is thin - few prints on either side, a small net bet or under $5M of premium - so +65 on 3,000 prints means more than +65 on 30. Prints whose underlying did not trade in that window are left out of the score; when none traded the score is null.
Try it out! You can test the API with the trial key TEST. Simply include it in your request headers; either here, or add the header "Ortex-Api-Key": "TEST" to your http request.
Trial key restrictions: Trial keys may be limited to a specific date range and set of regions. Requests outside the allowed regions or entirely outside the allowed date range are rejected; a date window that partially overlaps the allowed range is trimmed to it, reported in meta.restriction.
Get full access! Get a key at app.ortex.com/apis