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Generac — Where open interest creates price support and resistance
Generac (GNRC) is a Industrials stock with actively traded listed options. Open interest concentrates at the $190 put wall (0.8K contracts) and $210 call wall (0.9K contracts) — 2.7% below and 7.6% above spot. Dealer hedging flows at these levels tend to dampen directional moves, reinforcing the wall corridor. This setup is more supportive of premium selling inside the wall range. See Strategy Builder for trade setups.
Where options dealers' hedging flows create support and resistance — max pain at $175.
These levels show where price may find support or resistance based on open interest positioning. Large put walls can act as magnets; call walls can cap upside.
Use wall levels to pick strikes — sell puts near put walls, sell calls near call walls.
Wall = Strike with highest open interest concentration across expirationsOpen interest by strike, gamma exposure (GEX) profile, max pain calculation
ORATS open interest and gamma data, updated daily
Walls are based on current OI positioning and can shift as traders open/close positions. GEX assumes most OI is dealer-held — retail-heavy OI produces less hedging flow. Treat as context, not prediction.
Walls from nearest liquid expiry — these reflect short-term hedging activity and may not represent longer-term positioning.
OI change tracker (1-day), wall strength score, and GEX trend chart — in active development.
This data is free for all users. No paywall — just not built yet.
Quantitative screening, not investment advice. Verify with your broker. Disclaimer
Generac's current open interest profile shows relatively light concentration on both sides — put activity at $190 (768 contracts) and calls at $210 (857) are below average for this expiration cycle. Scattered open interest means dealer hedging flows are less concentrated, reducing the "wall" effect that typically pins price within a range. Premium sellers should treat current support and resistance levels as softer than usual — wider stop losses and smaller position sizes are appropriate until open interest builds at specific strikes.
Generac's current options landscape shows put support concentrated at $190 (768 contracts) with call resistance at $210 (857). This creates a $190–$210 trading corridor that dealer hedging activity naturally reinforces. Compare this wall-to-wall range with the Expected Move to see how volatility-based ranges align with open interest boundaries.
Generac is trading near its gamma exposure flip point at $195.00, where the net GEX of -0.1B could shift between positive and negative regimes with a relatively small price move. This transitional zone is the most unpredictable for premium sellers — dealer hedging behavior can change direction rapidly, making realized volatility erratic. Consider waiting for GEX to firmly establish in one regime before initiating new positions, or use small-sized defined-risk trades that won't be significantly impacted by a regime shift.
Generac's strongest put wall (support) is at $190 with 768 open interest contracts, and the primary call wall (resistance) is at $210 with 857 contracts. This creates a trading range of $190–$210. Open interest is relatively balanced between puts and calls, creating symmetric dealer hedging pressure.
Open interest walls represent concentrations of options positions at specific strikes. When dealers hold these positions, they must hedge by buying or selling shares as price approaches wall levels, creating natural support (put walls) and resistance (call walls). Generac is near its gamma flip point, so the effectiveness of these walls can change quickly. When GEX is positive, walls are reinforced by dealer hedging; when negative, walls become less reliable.
Use the put wall at $190 as support for put credit spreads and the call wall at $210 as a ceiling for call credit spreads. The wall-to-wall range defines your expected trading corridor. Wall data is most useful for strike selection — placing short strikes at or outside major open interest levels means your trade has dealer hedging flows working in your favor. Monitor daily for wall migration as open interest shifts.