What is GEX (Gamma Exposure)? A Clear Guide — with Today's Live Levels
Most GEX explainers give you theory and then sell you a subscription. This one is free, plain-English, and shows you today's actual levels as we go — so the ideas are concrete, not abstract.
What GEX isHow dealers hedgeCall wall Put wallGamma flipPositive vs negative gamma How to use itCommon mistakesFAQ
What GEX actually is
GEX (gamma exposure) measures the net gamma that options dealers are holding across every strike. In plain terms: it tells you how much dealers must buy or sell the market for each 1% move. Because dealers are enormous and hedge mechanically, where they hedge shapes where price stalls, bounces, and where volatility explodes. GEX turns that hidden positioning into levels you can see.
Why dealer hedging moves price
When you buy an option, a dealer takes the other side and hedges by trading the underlying. As price moves, their hedge has to move too. Sometimes that hedging pushes against the move (dampening it), and sometimes it pushes with the move (amplifying it). Which one is happening depends on whether dealers are net long gamma or short gamma — and that's exactly what the three GEX levels below tell you.
The Call Wall — resistance
The call wall is the strike with the largest positive dealer gamma above spot. As price rises toward it, dealers sell more and more of the underlying to stay hedged — and that selling acts like a ceiling. Rallies tend to slow or stall near the call wall.
The Put Wall — support
The put wall is the strike with the largest gamma below spot. As price falls toward it, dealers buy the underlying to hedge, and that buying acts like a floor. Dips often find support near the put wall.
The Gamma Flip — the pivot that changes everything
The gamma flip is the price where net dealer gamma crosses zero. It's the single most important level:
Above the flip → dealers are long gamma and hedge against moves. The tape is calmer and mean-reverting — dips get bought, rips get sold.
Below the flip → dealers are short gamma and hedge with moves. The tape is faster and trendier, and a break lower can snowball into a volatility expansion as hedging becomes pro-cyclical.
Positive vs negative gamma, in one line
Positive gamma = dealers stabilize = calm, range-bound. Negative gamma = dealers amplify = fast, trend-and-flush. The gamma flip is the border between them, and the call/put walls are the edges of the expected range within it.
How to use GEX (structure, not signals)
GEX describes positioning, not a trade to place. The honest way to use it:
1. Know the regime first
Above the flip: fade extremes toward the middle. Below the flip: respect momentum — moves go further.
2. Trade toward the walls, not through them
Expect the call wall to cap and the put wall to support — until a decisive break says otherwise.
3. Watch the flip for the volatility switch
A clean loss of the gamma flip is the tell that calm can turn into a fast, trending move.
Common mistakes
FAQ
Is GEX a buy/sell signal?
No. It's a read on dealer positioning — structure that shapes support, resistance, and volatility. It informs your decision; it doesn't make it for you.
Where does the data come from?
Derived from public options data and updated through the day. Prices are delayed 15+ minutes.
Do I have to pay?
No. LiveBriefing publishes GEX levels free, no signup — the same read pros pay for.