Every term that appears in ODTE GEX, explained first in one everyday sentence and then with just enough detail. If something still isn't clear after reading this, write to us — but we're betting you won't need to.
The basics
🍼 Options that expire TODAY. Like a coupon that dies at midnight.
Options expiring the same day. In QQQ they carry enormous volume and, since they die within hours, they force market makers to hedge fast — which is why they push intraday price action harder than anything else. ODTE GEX's "map of the day" comes from here.
🍼 A reservation with a deposit: pay a little today for the right to buy (call) or sell (put) at a fixed price.
A contract giving the right (not the obligation) to buy — call — or sell — put — an asset at an agreed price (the strike) until a date. Whoever sells that option takes on the obligation, and hedges constantly to avoid blowing up: that hedging is what moves the market, and what ODTE GEX measures.
🍼 The agreed price of the reservation.
The price the option lets you buy or sell at. Options are listed on a ladder of strikes; watching how many contracts sit on each rung shows where the market has placed its bets.
🍼 How many bets are still open on each rung.
The number of live contracts at each strike. Heavy OI at a strike = a lot of money committed there = market makers will defend that zone. It updates at each day's close; today's volume shows the fresh betting.
🍼 The casino's house: they sell you the chip, then hedge so they never lose.
The firms that take the other side of every option traded. They don't bet on direction: they hedge by buying and selling the underlying constantly. Because they're huge, their hedging moves price — predictably. GEX, charm and the walls measure exactly that.
The dashboard levels
🍼 The map of where the "house" must brake or push the price.
Measures how much dealers must buy or sell as price moves, strike by strike. With positive GEX their hedging leans against the move (dampened market); with negative GEX it amplifies the move (violent market). The call wall, put wall, flip and magnet all come from this map.
🍼 The day's ceiling: where the house starts selling to stop the rally.
The strike with the heaviest hedging supply above price. It acts as resistance: as price approaches, dealer hedging sells into it and the rally stalls. It's the red level on the dashboard.
🍼 The day's floor: where the house starts buying to stop the drop.
The mirror of the call wall: the strike where dealer hedging shows up buying and selloffs find support. It's the green level on the dashboard. A hidden buyer iceberg sitting right on the put wall is the strongest confluence ODTE GEX flags.
🍼 The market's mood switch: calm above it, wild below it.
The price where total GEX changes sign. Above it, dealers dampen every move; below it, they amplify it. Crossing the flip changes the "mode" of the day — which is why ODTE GEX fires an alert the moment it happens.
🍼 The day's magnet: the price the market keeps drifting back to.
The strike where gamma concentrates most. Dealer hedging around that point tends to "pin" price there, especially on quiet days.
🍼 The price where the most bets die worthless — and where the close often drifts.
The closing price at which the greatest value of options expires worthless (maximum pain for the people who bought them). Markets often gravitate there into the last hour. It's the closing magnet — distinct from the intraday magnet.
🍼 How far the market "thinks" it can travel today, based on what it paid for insurance.
Computed from the at-the-money straddle price (the cost of betting on pure movement). ODTE GEX anchors it to the open and shrinks it through the day, because that insurance loses value hour by hour.
The greeks that matter here
🍼 How much your chip gains if the market moves 1 point. DEX: all the chips added up.
Delta measures an option's sensitivity to price. DEX (Delta Exposure) aggregates the whole chain's delta in dollars: positive = net positioning is long, negative = short.
🍼 How fast delta changes. The accelerator of hedging.
If delta is speed, gamma is acceleration. Heavy gamma near price forces dealers to re-hedge constantly — the entire GEX map derives from it.
🍼 The clock's pressure: even if price sits still, passing hours force the house to buy or sell.
Measures how delta changes purely from the passage of time. In 0DTE it's enormous: every passing hour forces dealers to adjust hedges. ODTE GEX shows it as dollar flow per day, with its bias (bullish/bearish).
🍼 What your chip gains if fear (volatility) goes up.
Sensitivity of options to implied volatility. The chain's net vega says how many dollars move per point of IV.
🍼 What your chip loses per day just for existing. The rent of time.
The option's time decay. In 0DTE it's brutal: the straddle bleeds value hour by hour, which is why the day's expected range keeps shrinking.
🍼 If crash insurance costs more than rally insurance, there's fear.
The implied-volatility gap between puts and calls. More than ~3 percentage points = puts are expensive = the market is paying up for protection.
The tape and the flow
🍼 The live list of every trade: who bought, who sold, how much, at what price.
The record of every executed trade. ODTE GEX filters it down to what matters, classifies each trade as aggressive buying or selling against the live bid/ask, and highlights institutional blocks.
🍼 A giant order hiding by showing slices. You see the tip; the whale is underneath.
A big player who won't show their hand executes in small clips, always at the same price: the tape shows small repeated prints "reloading" again and again. ODTE GEX detects that signature in real time, infers which side the hidden player is on (via absorption), tracks it while alive, and then publishes the verdict: did their level hold (DEFENDED) or did it break (BROKEN)?
🍼 Everyone's buying and price won't go up: someone invisible is selling them everything.
When one side's aggression fails to move price, a hidden player on the other side is absorbing it. That's how ODTE GEX infers the iceberg's side: aggressive buying that can't lift price = hidden seller (ceiling), and vice versa.
🍼 One giant institutional punch, all at once.
An institutional-size trade executed in a single print. The opposite of an iceberg: here the big player doesn't hide. ODTE GEX highlights them with ★ on the tape.
🍼 The price ranges where the day's volume actually got worked.
Contiguous prices grouped where trading concentrated, with their core and a read: ceiling (buying absorbed), floor (selling absorbed) or transit (price just passed through).
🍼 The day's "fair" average price, weighted by how much traded at each level.
Volume-Weighted Average Price: the day's volume-weighted average. Institutions use it as an execution benchmark; on the ODTE GEX chart it's the dotted line.
The product
🍼 QQQ and NQ are the same animal in two different cages. We translate between them, live.
QQQ is the Nasdaq-100 ETF (where the 0DTE options volume lives); NQ is the future (where you trade). ODTE GEX computes levels in QQQ and converts them to NQ with a ratio calibrated live against the real future — median error under 1 point with NinjaTrader 8 connected.
🍼 The price right now. Not yesterday, not the future: now.
The last traded price. On the dashboard it updates tick by tick via push — the big number jumps like a broker screen.