title: How to Read a GEX Chart description: GEX charts look like volume profiles, but they show future hedging flow instead of past volume. Here's how to read gamma exposure walls, the zero line, and GEX by strike. date: 2026-08-03 category: Dealer Flow related: [gamma-exposure, gamma-flip, dealer-positioning]

How to Read a GEX Chart

If you have ever opened a gamma exposure (GEX) chart and seen a wall of bars plotted against price, you already know it looks like a volume profile. The trick is that it does not show past volume — it shows future hedging flow. That single difference makes it one of the most predictive charts you can learn.

This guide walks through exactly how to read one, level by level.

What the chart is showing

A GEX chart plots net dealer gamma against price, using the same horizontal price axis as your regular chart. Each bar represents how much mechanical dealer flow sits at that price level, and in which direction it pushes.

The vertical axis is price. The horizontal bars are gamma exposure.

The zero line (flip line)

The most important line on the chart is the zero line — where aggregate gamma flips from positive to negative.

• Above the zero line: dealer positioning is positive gamma. Price tends to mean-revert, so rallies get sold and dips get bought.
• Below the zero line: dealer positioning is negative gamma. Price tends to trend, so breakouts accelerate.

Because the entire dealer book changes character at this line, it functions like a major technical level. In fact, it usually becomes one.

Positive GEX walls (magnets)

Large bars sitting on the positive side are GEX walls. When price approaches one, dealers buy dips and sell rips around that level, which produces genuine resistance.

Read them like this:

• A wall of positive GEX above price → overhead supply, expect a stall.
• A wall of positive GEX below price → underlying support, expect a bounce.

Negative GEX pockets (accelerators)

Bars on the negative side are negative GEX pockets. Here dealers are forced to trade with the move — selling into weakness, buying into strength. Price that enters a negative gamma pocket tends to move through it quickly, not bounce off it.

This is why technical breakouts fail in positive gamma but follow through in negative gamma. The chart tells you which regime you are in before the move happens.

Reading GEX by strike

The bars are anchored to strikes, and the strike with the largest GEX reading near the current price is the one that matters most:

1. Find the biggest positive wall within a reasonable range above price.
2. Find the biggest positive wall below price.
3. Note where net GEX crosses zero — that is your flip line.
4. If price is trading between two large walls, expect range behavior between them. When one wall breaks, the next level of dealer flow becomes the target.

Common mistakes

• Confusing positive GEX with bullish. Positive gamma means mean reversion, not direction. It dampens both up and down moves.
• Ignoring the zero line. The flip line matters more than any single bar.
• Reading static charts. GEX changes as open interest and vol evolve — use the live chart, not a stale screenshot.
• Treating all walls equally. A wall where open interest is heavily front-loaded matters more than a wide, thin one.

Put it to work

1. Identify the current gamma regime from the zero line's position.
2. Mark the nearest large positive GEX wall above and below price.
3. Trade pullbacks toward the wall in positive gamma; respect the trend in negative gamma.
4. Re-check the chart at least once a day — regimes flip.

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