0DTE Volume & Intraday Reversal

Overview

This pillar analyzes the massive flow of options expiring the same day (0DTE) to pinpoint intraday support, resistance, and reversal points. It quantifies dealer gamma exposure to predict when market makers must aggressively hedge, driving short-term price action.

What It Does

It aggregates real-time transaction data for options with zero days to expiration across major indices (SPX, QQQ). It calculates the Net Gamma position of dealers to identify 'Gamma Flip' levels—price points where dealer behavior shifts from suppressing volatility to exacerbating it.

Why It Matters

0DTE options now account for over 40-50% of daily volume in major indices. Ignoring this flow means missing the dominant driver of intraday price mechanics. This pillar identifies the 'invisible walls' and 'magnets' created by massive expiring open interest.

How It Works

The system monitors the flow of calls vs. puts expiring today. It maps out the 'Gamma Profile' to see where dealers are long or short gamma. When price approaches a strike with heavy open interest, the model predicts whether dealers will defend the level (reversal) or if a breakout will trigger a feedback loop (volatility explosion).

Methodology

Calculates real-time Net GEX (Gamma Exposure) specifically for 0-day expiries. Uses a sliding window of 1-minute aggregations to track the rate of change in Open Interest and Volume. Identifies the 'Max Pain' strike and 'Gamma Flip' level dynamically throughout the trading session.

Edge & Advantage

Provides a 10-30 minute lead time on market reversals by tracking the cause (dealer hedging requirements) rather than the effect (price movement), offering a distinct advantage over lagging technical indicators.

Key Indicators

• 0DTE Put/Call Ratio

  high

  The ratio of trading volume between bearish and bullish bets expiring today.

• Intraday Gamma Profile

  high

  Visual map of where dealers must buy or sell to remain neutral.

• Volume Acceleration Rate

  medium

  The speed at which new positions are opening, indicating panic or FOMO.

Data Sources

• OPRA Feed

  Real-time consolidated options feed

• CBOE Intraday Data

  Exchange-level volume statistics for SPX/VIX

Example Questions This Pillar Answers

• → Will the S&P 500 close above 4500 today?
• → Will there be an intraday reversal in SPY before 2 PM?
• → Is the current market rally supported by call buying volume?

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