How to Read Net GEX — A 5-Step Field Guide for Futures Traders

If you've already read What Is Zero Gamma, the simplest way to think about it is:

• Zero Gamma = the price where dealer net gamma flips sign
• Net GEX = the amount of dealer gamma at the current price

One is a level. The other is a magnitude. You need both.

Why most retail traders read it wrong

The single most common mistake is treating Net GEX as a buy / sell signal. It isn't. Net GEX tells you how dealers will react to the next move, not what spot will do next. A trader who buys ES because "Net GEX went green" is reading the indicator three layers shallow.

What experienced flow traders actually do is far more boring: they treat Net GEX as a regime filter that re-weights their other signals. Strong positive Net GEX downweights breakout setups and upweights fade setups. Strong negative Net GEX does the opposite.

The 5-step routine

This is the exact sequence we recommend to new Hermēs users on Day 1. It takes about 60 seconds per scan once you internalise it.

Step 1 — Check the sign

Open the HuntingFlow Tactical HUD and look at the NET GEX card. Three states:

• Green ( + ) — dealers long gamma → market will try to mean-revert
• Red ( − ) — dealers short gamma → market will try to trend
• Neutral (≈ 0) — regime is undefined → expect chop or transition

The sign is your behavioural prior — it shifts the base rate for what should happen, but it doesn't predict the next tick.

Step 2 — Read the magnitude

Magnitude is what separates "weak regime" from "regime-on." In Hermēs the bar shows |Net GEX| as a fraction of the day's intraday range (that's the ZGR normalisation). Three buckets:

• < 30% — weak; act as if the signal isn't there
• 30 – 70% — material; weight your setups accordingly
• > 70% — dominant; trade in the direction the regime favours, fade against it only with extra confirmation

Step 3 — Watch the slope

Sign and magnitude give you where you are. Slope tells you where you're going. Look at the spark line under the Net GEX number (or the 30-minute window in the HUD).

• Rising slope, positive sign — dealers are getting longer gamma → expect range to compress, options sellers re-loading
• Falling slope, positive sign — dealers are unwinding → range may expand soon, watch for regime flip
• Rising slope, negative sign — dealers are getting less short → tail risk is being lifted, watch for sharp counter-trend snap
• Falling slope, negative sign — dealers are getting more short → trend leg can extend, do not fade

Step 4 — Hunt for divergence

This is where alpha lives. Hermēs draws spot and Net GEX as two overlaid lines on the Gamma Chart. When they diverge, something structural is happening:

• Spot down, Net GEX up → a large buyer is building positioning into weakness. Often precedes a reversal in 1-3 sessions.
• Spot up, Net GEX down → distribution. Retail is buying, dealers are getting shorter. Often precedes a flush.

Divergence is rare — maybe 5-8 trade-able instances per quarter on ES — but the hit rate is materially higher than any other Net GEX read.

Step 5 — Cross-check Zero Gamma

Last sanity check: does the sign of Net GEX match the side of 0Γ you're on?

• Spot above 0Γ + positive Net GEX → Consistent, regime is robust, trade with confidence
• Spot below 0Γ + negative Net GEX → Consistent, regime is robust
• Spot above 0Γ + negative Net GEX → Fragile, regime is breaking down → reduce size
• Spot below 0Γ + positive Net GEX → Fragile, regime is rebuilding → wait for resolution

When the sign disagrees, you're at an inflection. Don't be the hero — let the next 15 minutes tell you which side wins.

Worked example: 2026-04-17 ES open

• 08:30 ET — Spot 5410, 0Γ 5398, Net GEX +$680M, slope flat. → Above 0Γ + positive + strong magnitude = textbook Long Gamma. Sized fade plays around the Call Wall at 5425.
• 10:15 ET — Spot 5418, 0Γ 5400 (drifted up), Net GEX +$340M, slope falling fast. → Sign still positive but magnitude halved and slope falling → regime weakening, first warning.
• 11:42 ET — Spot 5395, 0Γ 5400, Net GEX -$110M, slope still falling. → Net GEX flipped before 0Γ break confirmed → divergence signal, position size cut to 25%.
• 11:48 ET — Spot 5390 breaks 0Γ. Net GEX -$320M. → Both signs agree, dominant magnitude → momentum playbook engaged.

Day's low ended up at 5362, 28 points lower. Net GEX called the transition first.

Common pitfalls

• Don't trade single-bar Net GEX prints. It's a noisy series. Always look at 5-minute smoothed reading or longer.
• Don't conflate magnitude with volatility. High |Net GEX| in Long Gamma = low realised vol. The two are inversely related.
• Net GEX is not a stop-loss tool. Position size and structural levels (Call/Put walls, prior day high/low) are. Net GEX is a regime overlay, full stop.

Where Net GEX fits in the Hermēs stack

This is layer 3 ("Positioning") of the GEX framework. The layers, in order:

1. Regime — Zero Gamma
2. Structure — Call Wall, Put Wall, Gamma Profile
3. Positioning — Net GEX (this article), DEX Flow, Vanna

The full Hermēs methodology layers these into a Confluence score — see the framework guide for the scoring rubric.

See it live

Net GEX, ZGR, and the full Gamma Chart are core Pro features. Try them on real ES / NQ data on the HuntingFlow page — or compare plans on pricing.

Related:

• What Is Zero Gamma — the level-based companion to Net GEX
• Long vs Short Gamma Regime — how to actually trade the two regimes Net GEX identifies
• Futures Trader Playbook — 5 real scenarios using these signals end-to-end