LEARN — OVERVIEW
Options market structure is the framework of mechanical forces created by dealer hedging, gamma exposure, and positioning dynamics. It explains why stocks pin at certain prices, why breakouts accelerate, and why the same stock feels different on different days.
Every open options contract creates a hedging obligation for the dealer who holds the other side. Collectively, these obligations form a structural landscape — a map of where mechanical buying and selling pressure is estimated to exist at every price level. This landscape is options market structure.
It is not a theory or a pattern. It is a mathematical consequence of how options work. When a dealer sells you a call, they must buy shares. When gamma increases near expiration, they must trade more aggressively. These are mechanical obligations, not discretionary choices.
Gamma Exposure (GEX) is the foundation. It measures how much hedging activity is estimated at each strike price. Positive GEX dampens moves. Negative GEX amplifies them.
Call walls and put walls are the strikes with the heaviest gamma concentration. They act as estimated structural support and resistance created by hedging flows.
The gamma flip level is where net GEX crosses from positive to negative. It divides the market into a dampened regime and an amplified regime.
Vanna and charm are the second-order forces that drive hedging flows from volatility changes and time decay — explaining why markets move even without news.
0DTE gamma creates extreme intraday structural dynamics as same-day options dominate SPX volume.
Implied volatility skew reveals how the market prices tail risk and shapes the asymmetry of vanna-driven flows.
Max pain identifies the expiration settlement price that minimizes total option payouts — creating a gravitational pull as expiry approaches.
Most market analysis focuses on price, volume, and fundamentals. Options market structure adds a layer that is invisible to these approaches: the mechanical, non-discretionary flows created by dealer hedging. Understanding this layer helps explain why price stalls at certain levels, why breakouts accelerate, why post-event rallies happen without news, and why expiration weeks feel different from non-expiration weeks.
Gamma Sonar makes this structural layer visible — computed from live greeks every 60 seconds on major indices and every 5 minutes across 95 tickers, with proprietary signals that no other platform offers.
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.