01 / Session history
What changed around your trade?
Compare saved spot, GEX and DEX through the session. Review the exposure backdrop around your entry and exit, with each measure on its own scale.
Review a saved session ↗
Enlarge chart ↗Gamma & delta exposure · SPX / SPY / QQQ
GEX, DEX &
options flow.
Research SPX, SPY and QQQ options in one workspace. Map gamma and delta exposure, inspect premium flow by minute, and compare price with key levels.
Complimentary access during beta. No account required.
Choose your starting point
What are you investigating?
01 / Exposure
Where is exposure concentrated?
Read GEX and DEX by strike and expiration. Inspect the call and put contributions behind a level.
Explore the heatmap 02 / Options flowWhat traded in that minute?
Compare call and put net premium, then inspect the saved trades behind the selected minute. Missing intervals remain visible.
Open Net Flow 03 / Price & levelsHow did price respond?
Review available price sessions with 5- or 20-minute candles, then compare them with the date and time of the exposure snapshot.
Review price & levelsSee the workspace
From the market map
to the detail that matters.
Prepare the levels you will watch. Examine the exposure behind them. Revisit the session with context.
Enlarge chart ↗02 / Exposure by strike
Find the levels that deserve a closer look.
See where net exposure is concentrated. Open call/put detail to examine the contributions behind a level before adding it to your trading plan.
Inspect a strike ↗
Enlarge chart ↗03 / Gamma profile
How does the model respond to price?
Explore simulated gamma across price levels, with spot, walls and the flip marked. Use the curve to understand model sensitivity, rather than as a price forecast.
Explore the gamma profile ↗
Enlarge chart ↗Map a level. Inspect its contributors. Compare the price response. Review the session.
Open dashboard ↗Read the measures together
Know what each
chart measures.
GEX describes sensitivity to a price move. DEX describes signed dollar delta exposure. Keep their units and timestamps in view when comparing them with price.
Explore the methodology- Gamma exposure
- GEX measures modeled dollar delta change per 1% spot move. Use it to locate where the book's directional sensitivity is most responsive to a change in spot.
- Delta exposure
- DEX measures signed dollar delta notional. Inspect how call and put contributions add to or offset each other. Its scale and units differ from GEX.
- Visible timing
- Exposure inputs are delayed by 15 minutes; open interest updates overnight. Collection time is shown separately from the age of individual inputs.
- Model assumptions
- The GEX model assigns positive call GEX and negative put GEX. Exposure estimates do not identify actual dealer holdings or executed buying and selling.
Research the mechanics
Read the chart.
Understand the measure.
Definitions, worked examples and visual guides linked to the charts they explain.
Options explained, from the contract upCalls, puts, Greeks and price/time/volatility scenarios, with visual examples.
Is this data live, delayed or saved?Check the quote clock, collection time, open-interest date and missing intervals.
How to read Net FlowFollow an interactive chart through the trades and calculations behind it.
What is gamma exposure?GEX, DEX and the assumptions behind the model.
Understanding the gamma flipHow a simulated zero crossing differs from current net GEX.
Call walls and put wallsExposure concentrations and their limits as price references.
Before you read a chart
Four questions, answered.
What is the difference between GEX and DEX?
GEX estimates how dollar delta changes for a 1% move in the underlying. DEX is signed dollar delta exposure at the current price. They have different units and are not interchangeable.
See a worked calculation ↗Is options flow the same as open interest?
No. Flow measures trades during a period; open interest counts outstanding contracts. EasyBear Net Flow subtracts eligible bid-side premium from eligible ask-side premium using matched quotes. It does not identify a trader’s intent.
Read the Net Flow example ↗Is every EasyBear chart live?
No. The current heatmap uses 15-minute-delayed exposure inputs and overnight open interest. Net Flow and price history have their own clocks and coverage. A recent page refresh does not make an older observation current.
Use the freshness checklist ↗Do call and put walls predict where price will stop?
No. They mark concentrations under the exposure model. Price can cross them or never reach them. Compare the level’s timestamp, the price response and later changes before drawing a conclusion.
Explore three level interactions ↗Built by Serene Tan
A trader's curiosity.
A clearer view of the market.
I spent more than ten years trading derivatives at major financial institutions. Reading the markets has always been the part I enjoy most: looking beneath a price move and asking what the data can actually tell us.
After leaving the industry, I'm focusing on my family and building EasyBear. My aim is to make options data easier to investigate, so you can bring more context and discipline to your own trading decisions.
About Serene Tan and EasyBearExplore the beta
Make the next review
more informed.
Open the dashboard for your market review. Register separately for EasyBear product updates if you'd like to follow what's being built.
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