GEXfreak makes Prism.
Prism by GEXfreak is a web chart that puts the options book for SPY, QQQ and IWM on price, so you can see where the modeled levels sit before you plan an entry or a stop.
Where the name comes from
GEX is options-market shorthand for gamma exposure: a modeled estimate of options gamma at each strike price. GEXfreak is named after it. The whole product is about reading that number clearly and saying what it can and cannot tell you.
What Prism shows
- Gamma exposure by strike
- Modeled exposure for every listed strike and expiry out to 90 days, grouped into nearest, 14, 30 and 90-day windows.
- Call wall, put wall and gamma flip
- The strikes where modeled exposure concentrates, and the price where it changes sign, drawn on the chart next to volume profile.
- Data clocks
- Every source keeps its timestamp in view, so an old book never looks current.
The assumptions behind each level are on the methodology page. New to the topic? Start with gamma exposure basics.
What Prism is not
Prism is a charting and research tool. It does not give personalized investment advice, place trades or hold customer money. Modeled levels are context and can fail.
Common questions
- What is GEXfreak?
- GEXfreak makes Prism by GEXfreak, a web chart of options gamma exposure (GEX) levels for SPY, QQQ and IWM: call and put walls, the gamma flip, gamma by strike and volume profile, drawn on price.
- What does GEX mean?
- GEX is short for gamma exposure, a modeled estimate of options gamma at each strike price. Prism counts calls as positive and puts as negative. That is a model assumption, not a measurement of dealer inventory.
- Is GEXfreak related to the Gex video game?
- No. GEXfreak takes its name from GEX, the options-market term for gamma exposure.
- What does Prism show?
- Gamma exposure by strike for every listed expiry out to 90 days, the call wall, the put wall, the gamma flip and volume profile for SPY, QQQ and IWM. Each data source keeps its timestamp in view.
- Is Prism free?
- The public chart shows a labeled, published session. Live books need a paid Prism membership; plans are on the pricing page.
- Does Prism give trading advice?
- No. Prism is a charting and research tool. It does not give personalized investment advice, place trades or hold customer money.
Contact
Questions about the product or your account go through support.