What is 0DTE (zero days to expiration)?
What Is 0DTE Options Trading?
Updated 2026-07-22
Quick answer
0DTE options expire the same trading day. Gamma and theta move fastest near the money on that clock.
Also called: 0DTE, 0 DTE, zero DTE, same-day expiry.
Visual explainer
0DTE options expire the same day. Gamma and theta move fast, filter DTE on the tape and validate with structure.
Full definition
Same-day expiry packs hedging and speculation into a short window. Liquidity near the money can be excellent; path risk is extreme because small underlying moves reprice delta and gamma fast. Treat 0DTE flow as session character and strike attention. Validate with walls and GEX instead of chasing every print.
How it shows up in TradingFlow
- Option Trades
Filter Days to Expiry (DTE) to focus the live tape on same-day or short-dated contracts.
- Rank Contracts
Surface which short-dated contracts are absorbing unusual size.
How to read it
- Set DTE bounds (e.g. 0–1) before scanning premium spikes.
- Prefer ranked contracts over raw tape scroll in SPY/SPX-like noise.
- Map short-dated walls/GEX context so you are not trading pure print FOMO.
Who this is for
Intraday index and ETF options traders who need DTE filters and impact ranking on the same session.
Common mistakes
- Treating every 0DTE print as smart-money conviction.
- Ignoring that multi-leg structures can fake directional side.
- Using end-of-day OI habits for same-day contracts that die at the close.
Frequently asked questions
- Is 0DTE only for SPX and SPY?
- Those products dominate headlines, but “0DTE” means any option expiring today. Always check the contract’s expiration date on the tape.
- How do I isolate 0DTE in TradingFlow?
- On Option Trades, use the Days to Expiry numeric filter (among 13 dimensions) to bound DTE to same-day or short windows.
Related terms
- Option flowOption flow is the time-and-sales stream of options prints: contract, size, premium, and inferred aggressor side.
- Gamma exposure (GEX)GEX estimates aggregate dealer gamma from listed options. Positive gamma tends to dampen moves; negative gamma tends to amplify them. Option gamma is the building block; a gamma squeeze is a feedback loop when short-gamma hedges chase price higher.
- Options sweepA sweep is a large order filled across multiple exchanges in rapid succession, usually to grab available liquidity quickly.
- Unusual options activity (UOA)UOA flags contracts or underlyings trading far above recent norms in volume, size, or premium. It is an attention screen, not a directional signal.
More guides
See the workflow in TradingFlow
Open the live Option Trades tape, rank unusual activity, and validate structure in one research path.