Skip to main content

​
Options Chain Graph

The Option Chain Graph visualizes option gamma exposure across strike prices for both calls and puts. It helps traders quickly identify key support/resistance levels, hedging pressure points, and the gamma regime of a stock or ETF.

​
What You’re Seeing

This chart overlays five data layers, each helping you interpret important features of the options market:
  • Calls (bars): The green bars represent the gamma exposure of all call options at each strike price.
  • Puts (bars): The pink bars show the gamma exposure for put options at each strike.
  • Stock Price (line): The red vertical line marks the current price of the underlying stock.
  • Call Wall (green dotted line): The green dotted line highlights the strike with the largest call gamma exposure—typically a key resistance.
  • Put Wall (purple dotted line): The purple dotted line highlights the strike with the largest put gamma exposure—often a crucial support level.
Use these layers to locate major support and resistance zones, see how hedging flows might behave, and quickly assess the “gamma regime” of the stock or ETF.

​
What Each Term Means

  • Strike:
    • Each bar represents an option strike price—a specific price where traders have open options positions.
  • Gamma:
    • Measures how much an option’s delta (its price sensitivity) changes as the stock moves.
    • High gamma = high sensitivity → triggers large hedging activity by market makers.
    • Lots of open interest at a strike leads to gamma spikes, often forming support or resistance “walls.”
  • GEX (Gamma Exposure):
    • The total market exposure to gamma at each strike, factoring in both open interest and option deltas.
    • Positive GEX (usually from calls): stabilizes price moves (market makers hedge “against” volatility).
    • Negative GEX (usually from puts): amplifies price moves (market makers hedge “with” volatility, adding to it).
    • Color intensity = GEX:
      • Darker or stronger shades mean greater exposure at that strike.
      • Use this to judge how much a gamma spike might influence price action.
  • Call Wall:
    • Strike with the maximum call gamma.
    • Shown as a green dotted line, this is where market makers are short gamma, creating a resistance ceiling.
  • Put Wall:
    • Strike with the maximum put gamma.
    • Shown as a purple dotted line, this is where market makers are most long gamma, creating a support floor.
  • Max Gamma:
    • The highest absolute gamma (from calls or puts).
    • Indicates the most critical hedging level on the chart.

    ​
    How to Read the Bell Curve

You’ll often see the chart takes on a bell-like shape:

​
Interpretation Guide

  • Centered Bell: Most gamma exposure is near the current stock price (at-the-money), indicating balanced positioning and typically less wild price swings due to offsetting hedging flows.
  • Skewed Right (Call-heavy): Gamma is clustered above the stock price, often signaling traders expect upward moves, but hedging by market makers can dampen volatility.
  • Skewed Left (Put-heavy): Gamma is clustered below the stock price, reflecting downside protection demand—if the price drops through this zone, volatility can spike as hedging accelerates.
  • Bimodal (Two Humps): Two distinct gamma peaks appear, usually at different strikes. These can act as competing “magnets,” and price may oscillate between these critical levels.
Use the overall shape to quickly assess the type of options positioning and where the strongest hedging reactions (support/resistance) are likely.

​
How to Interpret the Key Lines

​
5. How to Use This Information Practically

​
6. Visual Cues & Color Hints

​
7. Reading Tips For Beginners

  • Think of “walls” as magnetic areas for price:
    • Price gravitates toward the max gamma zone (mean reversion).
    • Moves beyond walls (call or put) often trigger volatility spikes.
  • The higher and narrower the bell, the stronger the hedging effect (“pinning”).
  • Red line (spot) centered: Market is neutral.
  • Red line near green dotted line (call wall): Market stretched upward; resistance ahead.
  • Red line near purple dotted line (put wall): Market stretched downward; support ahead.

​
9. Troubleshooting Common Questions

​
10. TL;DR — Quick Gamma Chart Rules

  • Call wall = resistance (green dotted line)
  • Put wall = support (purple dotted line)
  • 🔴 Red vertical line (spot) = current price
  • 🟩 / 🟪 Bar height = strength of exposure
  • Bell curve shape ⇒ balance of hedging flows (peak = stability zone)
  • Price between walls: Stable/pinned regime
  • Price outside walls: Volatility is more likely
  • Big walls: Pin price or cause friction
  • If price crosses toward a big wall: Expect slowing or consolidation
  • If there’s a large gap between price & both walls: More room for movement; watch for mean reversion

​
Mini checklist (before trusting your read):

  • Correct expiry selected
  • Data updated recently
  • Units consistent ( millions or not )
  • Walls computed ( max gamma )
  • Price make sense ( check with latest real price )
  • Check open interest/volume for wall legitimacy
  • Zoom in/out per expiry for clarity
  • Common Pitfalls:
    • Don’t mix up call and put walls (remember: call wall = green dotted line, put wall = purple dotted line)
    • Walls don’t “predict” direction, they show likely friction zones
    • A small wall on a low-gamma day is much less meaningful than a massive wall during high activity

​
FAQ (New Users)

Q: Why do I sometimes see only one big hill?
A: Sometimes all the gamma is on calls (or puts) for a given expiry; the other side can be empty or weak. Q: Is the tallest bar always the wall?
A: The maximum gamma for each side (calls vs puts) defines the walls. Compare within each side separately. Q: Do higher gamma bars mean price will always reverse there?
A: Not guaranteed! Think of these as “friction zones,” not absolute reversal points. Large, heavily traded walls are more likely pin zones, especially near expiry, but news or major flows can break them.