Free SPY GEX - SPY Gamma Exposure
Free SPY GEX shows modeled gamma exposure by strike, including net GEX, call wall, put wall and gamma flip. Select expirations and generate the chart to see where SPY options exposure is concentrated.
How to use the SPY GEX tool
Search SPY
SPY is already entered. Keep it or enter another ticker, then select Search.
Select expirations
Choose one or more expiration dates to include.
Generate GEX
Select Generate GEX to view the chart and key levels.
Run up to 3 free GEX calculations per day. Need more?
Continue for free in the GEX SandboxGEX Workspace
Multi-ticker dashboard with alerts
GEX Heatmap
Strike-level gamma by expiration
GEX Intraday PlayTape
Intraday gamma movement & replay
Max Pain Calculator
Options pain strike by expiration
What is Gamma Exposure (GEX)?
Gamma Exposure represents the sensitivity of an option's delta to changes in the underlying price. Market makers hedge their gamma exposure, creating support/resistance at high GEX strikes.
Key Levels:
- Call Wall: Strike with highest positive GEX (resistance)
- Put Wall: Strike with the largest put GEX, shown as the deepest negative bar (support)
- Gamma Flip: Where total GEX changes from negative to positive
Positive GEX: Market makers sell into rallies, buy into dips (stabilizing).
Negative GEX: Market makers buy into rallies, sell into dips (amplifying moves).
Select a ticker and expiration date, then click Generate GEX to see the analysis
Build your SPY GEX workspace
Add SPY Heatmap, Max Pain and other GEX views to a custom multi-ticker workspace.
Open GEX WorkspaceWant to compare strikes across expirations? View the SPY GEX heatmap.
Understanding SPY gamma exposure
The SPY chart organizes QuantWheel's modeled SPY gamma exposure by strike. Compare positive and negative bars across the selected expirations before interpreting the call wall, put wall or gamma flip.
Use the SPY profile to identify where the selected model is concentrated and how it changes when expirations change. The result describes the options data included in the calculation and is not a forecast or standalone trading signal.
New to the concept? Start with our guides to gamma in options and the options Greeks.
SPY GEX methodology and limitations
QuantWheel calculates SPY GEX from the selected expirations, available options data and the formula displayed in the calculator. The result summarizes modeled gamma exposure by strike.
GEX is a model output, not observed dealer inventory or a price forecast. Open interest does not identify who owns an option, and the displayed call wall, put wall and gamma flip can change when the inputs or selected expirations change.
SPY GEX FAQ
What is SPY GEX?
SPY GEX estimates gamma exposure across listed SPY options using option gamma and open interest. It helps you compare how modeled exposure is distributed by strike and expiration. SPY GEX does not reveal actual dealer positions or predict where SPY will trade.
How do I read the SPY call wall and put wall?
QuantWheel labels the SPY call wall as the strike with the largest positive modeled GEX and the SPY put wall as the strike with the largest negative modeled GEX in your selected data. Compare both with the SPY price and expiration choices. They are reference levels, not guaranteed support or resistance.
What is the SPY gamma flip?
The SPY gamma flip is the price where modeled net gamma crosses zero for the selected SPY options data. Compare it with the current price and the shape of the strike chart. The SPY gamma flip is a model output, not a trading signal.
Which expirations should I use for SPY GEX?
Start with the nearest SPY expiration to study short-dated positioning, then add later expirations to compare a broader part of the options chain. Each selection changes which SPY contracts are included, so compare one expiration with a combined view before drawing conclusions.
Is the SPY GEX calculator free?
Yes. You can run up to three free SPY GEX calculations per day on the public tool. After using those calculations, continue for free in the GEX Sandbox. Check the current QuantWheel pricing page for plan access details.