ICT ORG — Opening Range Gap

What Is the ORG?

The Opening Range Gap (ORG) is the price difference between the prior day's regular-trading-hours close — the 4:15 PM ET settlement for index futures — and the current day's 9:30 AM ET open. Because futures trade nearly around the clock, the gap is invisible on a standard chart; it appears only when the chart is set to regular trading hours (RTH), hiding the overnight session. The gap's range is subdivided into quadrants — 25%, the 50% consequent encroachment, and 75% — and this grid, plus the settlement price itself, forms the morning's reference system: partial fills terminate on quadrants, rejections off them referee gap-and-go versus gap-fill days, and the unfilled portion stands as inefficiency the market may return for days later.

The ORG entered the ICT canon prominently in the 2023 teaching cycle, and it earned the attention: it converts the oldest observation in index trading — "the gap wants to fill" — into a graded, coordinate-level tool. The crude version of gap trading is binary and frequently wrong; the ORG version asks how far into the grid price reaches, which quadrant produces the reaction, and what the treatment of the midpoint says about the day being built. That's a different instrument — and it slots directly into the machinery this site already documents, because every quadrant reaction is just a PD array interaction awaiting the standard sequence, and the settlement magnet is a draw with an institutional pedigree.

The Mechanics — Settlement, Open, and the Chart That Hides It

The two anchor prices. The 4:15 PM settlement isn't just the last RTH trade — it's the exchange's official daily mark, the price against which the entire regular-hours world is margined, benchmarked, and reported. The 9:30 AM open is where that world resumes. Everything traded in the seventeen hours between belongs to the overnight session — real trade, but conducted at a fraction of RTH participation. The ORG measures how far the overnight moved the market away from its official mark before the full-participation session got its say.

The visibility trick. On a 24-hour chart, no gap exists: Globex trade fills the window from 4:15 PM to 9:30 AM continuously. Switch the same chart to RTH-only, and the overnight candles vanish — yesterday's 4:15 close now sits adjacent to today's 9:30 open, and the jump between them is the ORG. This is the single most misunderstood thing about the concept: the level is settings-dependent, but the reference is not. Institutional desks track distance-from-settlement whether or not any chart draws it, exactly as they track the electronic-session gaps — which live at different prices on a different clock, and which the ORG must never be confused with.

The quadrant grid. Measure the range from settlement to open and divide by four: the 25% level, the CE at 50%, and the 75% level (percentages read from the open toward settlement — a "25% fill" has closed a quarter of the gap). ICT's contribution is treating these as first-class levels rather than trivia: intraday reactions cluster on them with the same to-the-tick behavior every other array shows, and the CE carries its usual gravity-line status — the treatment of the gap's midpoint is the single most informative read in the first hour. Reject before it: the gap is defending. Accept through it on bodies: settlement is live as the draw.

Gap-Fill vs Gap-and-Go — The Two Morning Scripts

Every RTH open with a meaningful ORG poses one question, and the first sixty to ninety minutes answer it. The quadrant grid is how you read the answer early.

The gap-fill script. The open's initial push away from the gap fails quickly — often as a Judas-flavored fake in the gap's direction — and delivery turns back through the grid: 25%, CE, 75%, settlement. The tells: early acceptance through the CE on bodies (the decisive one), overnight inventory positioned against the gap, and a daily bias pointing back toward settlement. Once the CE is accepted, settlement is the working draw, and the quadrants flip roles behind price — each one now resistance (in a down-fill) for the retraces that offer entries. Fills that stall mid-grid are information too: a fill that dies precisely at 75% and reverses has completed a partial rebalance and often marks the low of the morning.

The gap-and-go script. The market opens away from settlement because the repricing is real — and the gap barely gets addressed. The tells are the mirror image: the retrace into the gap is shallow, terminating at the 25% quadrant or the near edge, the rejection is displacive, and the day expands away, leaving most of the gap unfilled. That open gap doesn't expire at the close — it stands as inefficiency on the RTH ledger, a level the market may return for days later like any unfilled imbalance, and a standing draw candidate for every subsequent session's planning.

Size grades the read. A ten-point NQ ORG is morning furniture; a hundred-plus-point event gap is a different regime — large gaps fill fully far less often on day one, and their quadrants govern for days, not hours. Before classifying the script, classify the gap: measured against the recent average, is this routine drift or a genuine repricing? The former usually resolves same-morning; the latter turns the quadrant grid into the week's scaffolding.

ORG vs the Rest of the Gap Family

Two disambiguations do most of the protective work. ORG vs NDOG: different clocks (4:15→9:30 vs 5:00→6:00), different charts (RTH-only vs any), different prices — both real, both tracked, never interchangeable; the full electronic-session treatment lives in the NDOG guide. ORG vs opening range: near-identical names, unrelated objects — the opening range is the high-low span of the first half hour of trade (covered in the kill zones guide), a range built by trading, while the ORG is a gap built by the absence of RTH trading. The 2023-era synthesis uses both at once: the opening range forming inside or against the ORG's quadrant grid, with the first presented FVG after 9:30 frequently supplying the entry array for whichever script the grid confirms.

NQ Walkthrough — The Fill Day, Traded Off the Grid

Pre-market: NQ settled Tuesday at 21,584 (4:15 PM). Wednesday's 9:30 open prints 21,668 — an 84-point gap up, moderately large against the recent average. Grid marked in seconds: 25% at 21,647, CE at 21,626, 75% at 21,605, settlement 21,584. The bias work leans retracement-first: the overnight rally ran into a daily-chart array, and the open is parked at premium against the true day. Plan: "let the grid classify the morning; if the CE goes on bodies, settlement is the draw."

The classification, live: 9:31–9:39 pushes up 22 points — the early Judas — and fails at the overnight high without displacement. By 9:48 the reversal leg is through the 25% quadrant and closes a 5M body below the CE at 21,626: the decisive tell. The grid's verdict is in — fill day — and the trade plan arms on the standard sequence, not the verdict alone.

The entry: the 9:56 retrace lifts back to 21,641 — into the underside of the spent 25% quadrant, where the reversal leg left a SIBI at 21,634–21,650. Short from the imbalance's CE at 21,642; stop 21,671, above the open and the Judas high; the sequence beneath it a valid shift. Delivery walks the staircase: 75% at 21,605 stalls it for eleven minutes (first partial off), then gives way — and at 10:41 the tape prints 21,585, one point off Tuesday's settlement, and buys hard. Full fill, runner off at the magnet, 2.6R — every target on the route pre-printed by arithmetic done at 9:30.

ES Walkthrough — The Go Day, and the Discipline of Not Fading It

Pre-market: ES settled at 6,847.50; Thursday opens at 6,872.25 — a 24.75-point gap up on strong breadth, following through on a bullish weekly structure. Grid: 25% at 6,866.00, CE at 6,859.75, 75% at 6,853.75. Bias: continuation long — which immediately reframes the gap's role. On a fill day the grid is a target list; on a candidate go day it's a defense system, and the question is which quadrant the defense shows up at.

The classification: 9:34's first dip reaches 6,865.75 — a tick through the 25% level — and the reaction is immediate: a displacement candle off the quadrant that closes back above the open within four minutes, leaving a clean 2M FVG at 6,867.25–6,869.50. Shallow retrace, first quadrant, displacive rejection: the go-script's full signature, confirmed before 9:40. The trade is continuation — long 6,868.50 at the FVG's CE on the 9:41 revisit, stop 6,862.50 below the quadrant that just defended (a close through it would put the CE in play and void the script).

The delivery — and the trap avoided: ES expands all morning: overnight high by 9:58, the weekly level at 6,884 by 10:35, runner off at 6,889.75 into the 11:00 macro for 3.4R. The gap never trades below 6,865.75 again all session — 22 of its 24.75 points still standing at the close, an open item on the RTH ledger that becomes next week's draw candidate. The discipline half of the walkthrough: a fill-biased trader fighting this tape shorts the 25% rejection, the re-test, and the lunch drift, paying three stops to a grid that announced its verdict at 9:38. The ORG's most profitable output is often the fade it talks you out of.

One habit extends the concept beyond the single morning: keep the ledger. Unfilled ORGs — especially the large, event-born ones — stay live as reference for days, their quadrants continuing to catch retraces with the same precision they showed on day one, and the market's eventual return to an old settlement level regularly explains a "mystery" reversal a week after the gap printed. A simple weekly review pass — which gaps filled, which stand, which quadrants have been defended — leaves you carrying a short list of standing RTH inefficiencies into every session's planning, alongside the electronic gaps' recent-five map and the week's NWOG. Three ledgers, maybe a dozen numbers between them, and the day's "invisible" turning points are mostly accounted for before the open.

Common ORG Mistakes

Wrong chart, wrong gap. Marking the ORG from a 24-hour chart's prices (or hunting for it there at all), or conflating it with the NDOG's 5:00→6:00 coordinates. One checkbox — RTH — creates the level; the electronic gaps live elsewhere and get tracked separately.

Assuming the fill. "Gaps always fill" is the retail version; the professional version is that the grid classifies the day first. Trading the fill before the CE speaks — or fading a go day's expansion because settlement "must" be visited — is trading the slogan instead of the read.

Ignoring gap size. Routine gaps and event gaps are different regimes. Applying same-morning fill expectations to a repricing gap several times the recent average is a category error the quadrants can't save you from.

Trading the grid without the sequence. Quadrants are locations. The entries in both walkthroughs came from the standard machinery — sweep, shift, array — executed at grid coordinates. A limit order parked blind at the CE because it's the CE is a donation with extra steps.

Letting old gaps rot on the chart. Unfilled ORGs persist as reference — but curated, like every archive on this site (the RDRB discipline applies verbatim): recent and unaddressed in the foreground, consumed gaps retired, the ledger readable at a glance.

Frequently Asked Questions