Options flow analysis tracks institutional buying and selling of options contracts in real-time. For ES futures traders, monitoring SPX options flow reveals where large participants are placing directional bets, hedging risk, or building positions – often signaling price pivots before they show up on the futures chart.

HIRO (Hedging Impact Real-time Overlay) tracks cumulative customer delta from options trades during regular trading hours. When HIRO diverges from price action – for example, HIRO flattening while ES keeps rising – it signals that options flow is exhausting, and a reversal is likely forming. This divergence at key gamma levels provides the highest-conviction pivot signals.

0DTE (zero days to expiration) flow represents same-day options trades that are highly reactive and short-term – these generate large immediate dealer hedging impacts but are prone to reversal. Longer-dated flow (weekly, monthly expirations) represents more deliberate institutional positioning with higher conviction and more stable price effects.

Options flow is most reliable during the New York AM session (9:30-11:30 ET) when institutional volume peaks, and during power hour (3:00-4:00 ET) when end-of-day positioning accelerates. Flow signals are less reliable during lunch hours (12:00-1:30 ET) due to lower volume, and should not be used outside regular trading hours.