Free NI GEX Heatmap - NiSource Gamma Exposure
Use free NI GEX Heatmap to compare modeled gamma exposure across strikes and expirations for NiSource. Generate the grid, then review call wall, put wall, gamma flip and expiration structure alongside business context that includes power demand, regulation, fuel costs, and interest rates.
What is a GEX Heatmap?
A GEX heatmap shows net gamma exposure across many strikes and expiration dates in one color-coded grid. Each cell is the net gamma at one strike for one expiration.
Cell Colors:
- Green: Positive gamma (call-dominated strikes)
- Purple: Negative gamma (put-dominated strikes)
- Stronger color means more gamma at that point
Key Levels:
- Call Wall: Strike with highest positive GEX (resistance)
- Put Wall: Strike with the largest put GEX (support)
- Gamma Flip: Where total GEX changes from negative to positive
Enter a ticker to generate the GEX heatmap
Displays net gamma exposure per $1 move for each strike across expiration dates
How to use the NI GEX Heatmap
Confirm NI
NI is already entered. Keep it or search another ticker.
Choose the formula
Keep the default formula or select the available calculation view.
Generate the Heatmap
Create the grid, then compare exposure across strikes and expirations.
Key levels
NI GEX heatmap levels in detail
Data as of
Spot
$46.06
Call wall
$45
2.3% below spot
Put wall
$40
13.1% below spot
Gamma flip
No level
Net GEX
$17K
positive gamma
Since the previous session (Nov 12)
- Spot up 0.5% ($45.82 to $46.06)
- Call wall unchanged at $45
- Put wall unchanged at $40
- Net GEX $19K to $17K
These are the levels across every expiration in the latest snapshot. The heatmap below breaks the same exposure out strike by strike and expiration by expiration, so you can see which expiry carries each level.
Reviewed by the QuantWheel research team. Modeled from listed NI options data; not observed dealer inventory and not a forecast. Read how we compute NI GEX heatmap levels.
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Understanding the NI GEX heatmap
The NI options chain represents NiSource. Evaluate its open-interest distribution alongside business context that includes power demand, regulation, fuel costs, and interest rates. Use the heatmap to compare modeled exposure by strike and expiration instead of reading one cell without the surrounding grid.
For NI, compare nearby expiration columns with later expirations before interpreting the call wall, put wall or gamma flip. Changes in open interest and included contracts can alter the modeled grid. The result describes selected options data and does not predict where NiSource will trade.
NI Heatmap methodology and limitations
The grid applies the selected formula to available NI options data and organizes the modeled result by strike and expiration. The call wall, put wall and gamma flip summarize that model across the displayed data.
The heatmap does not observe market-maker positions, identify who owns a contract or predict the next NI move. Use it as positioning context and compare the model with price, liquidity and your own risk plan.
Prefer a strike-level chart? Open the NI GEX chart.
NI GEX heatmap FAQ
What is a NI GEX heatmap?
A NI GEX heatmap is a grid of QuantWheel's modeled gamma exposure. Rows represent strikes, columns represent expirations, and color intensity represents the direction and relative size of the modeled exposure in each cell.
How do I read the NI GEX heatmap?
Start with strikes near the NI price, then compare the nearest expiration columns with later expirations. Read down one column to examine one expiration and across one row to see whether modeled exposure at a strike appears in several expirations.
What do the NI GEX heatmap colors show?
Green cells show positive modeled net gamma and purple cells show negative modeled net gamma. Stronger color indicates a larger modeled value. The colors describe the calculation and are not guaranteed bullish, bearish, support, or resistance signals.
How are the NI call wall, put wall and gamma flip modeled?
QuantWheel derives the displayed NI levels from the selected formula and available options data. The call wall marks the largest positive modeled exposure, the put wall marks the largest negative modeled exposure, and the gamma flip estimates where aggregate modeled gamma changes sign.
How is the NI GEX heatmap different from the NI GEX chart?
The NI heatmap separates modeled exposure by strike and expiration. The NI GEX chart provides a strike-level profile in a chart view. Use the heatmap when the expiration breakdown matters and the chart when you want a simpler strike profile.
Is the NI GEX heatmap free?
Yes. QuantWheel provides a limited number of free NI GEX heatmap calculations. The tool shows the remaining free uses before you generate another heatmap.