TOOLS — PRIMARY VIEW
The Pressure Field is Gamma Sonar's primary display. It shows gamma exposure at every strike price as horizontal bars — giving you a complete structural map of where dealer hedging is estimated to concentrate.
The Pressure Field displays the estimated gamma exposure at every strike price as horizontal bars emanating from a center line. Green bars extending right represent positive GEX — strikes where dealer hedging is estimated to create buying pressure (structural support). Red bars extending left represent negative GEX — strikes where hedging may create selling pressure (resistance).
The current spot price is highlighted so you can see where the market is trading relative to the entire positioning structure. Key levels — call wall, put wall, gamma flip, and GVWAP — are marked as reference lines.
Stack mode breaks out seven individual layers per strike, each showing a different dimension of the positioning structure: Net Open Interest, GEX, Delta Exposure, Charm Exposure, Vanna Exposure, Call OI, and Put OI. Toggle between single-layer and stack views to examine specific aspects of the structure.
Not all gamma is equal. The Pressure Field lets you filter by expiration: 0DTE (today's expiry only), this week, monthly, or all expirations combined. 0DTE gamma has the most immediate structural impact. Monthly expirations carry the most open interest. Viewing each separately reveals which time horizon is driving the current structure.
A price chart overlays the Pressure Field so you can see live price action in the context of the gamma structure. Key levels appear as horizontal lines aligned with the bar rows — showing exactly where price sits relative to structural support and resistance.
The Pressure Field is most informative when price is trading near areas of concentrated positioning. When price is far from any major GEX concentration, the structural influence of dealer hedging is smaller relative to other market forces. The display updates every 60 seconds from live greeks on SPX, SPY, QQQ, and major indices — other tickers refresh on 5-minute cycles.
Gamma Sonar recomputes GEX from live greeks every 60 seconds on SPX, SPY, QQQ, and major indices — plus 90+ additional tickers on 5-minute cycles.
START 7-DAY FREE TRIAL →Gamma Sonar provides structural analytics for educational purposes only. Not financial advice. All models involve assumptions. Past patterns do not guarantee future results.