Overnight inventory & unfinished business

09:20 ET (21:20 ICT, winter time). You are writing the morning sheet. Overnight, NQ rallied 70 points in the Asia–London handoff, then went sideways near the top for five hours. The high printed twice at the same price with no tail, and the fast leg up left a thin patch of almost no volume behind it. Two classic Market Profile ideas are now on your screen: “overnight inventory gets corrected” and “the auction goes back to finish its business”.

This lesson turns that night into two or three lines on the sheet. It also shows which parts of the story have been tested, and what the tests found.

Key terms

Overnight inventory (tồn kho qua đêm) is the net position the overnight session carries into the 09:30 ET open: mostly bought above the prior close means net long, mostly sold below it means net short Definition. M2.11 shows how to measure it in two minutes; here you use the result.

Unfinished business (việc dang dở) is the name auction traders give to structure where the market moved on without two-sided trade Definition:

• a poor high or low (đỉnh/đáy kém, M2.09): an extreme printed flat, by two or more periods at the same price, with no tail;
• single prints (vùng in đơn, M2.08): a stretch of prices crossed in one period with almost no volume.

The definitions are descriptive. What traders do with them (treat them as places price has to come back to) is a separate claim, and that claim is graded below.

Chart first: what the night left behind

How it works

From the overnight read to the sheet

Read the night from its structure, not from the headlines Definition:

• Range and where the volume sat. The night’s high and low, its POC, and whether most volume traded above or below the prior close (M2.11).
• Trended or balanced. A night that travelled and then stopped (like the chart) looks different from one that rotated in a 20-point box.
• Who is holding at a loss at the open. If the open sits below the night’s value, most overnight buyers are underwater; above it, most overnight sellers are.

That read is real context Context. It tells you how much ground the night covered and who is uncomfortable. It does not tell you what those traders do next: someone underwater can cover, hold or add.

Myth / hypothesis: “A long night gets corrected early: the open has to test the night’s comfort, trapped longs exit, and their selling speeds up the drop. A trending night is fuel for the open; a balanced night is not.” Lore On NQ the “corrected early” claim leaned slightly the other way (−5.0 pp, n = 1,818; see the notes under “What the data says”). Whether trending and balanced nights behave differently at the open is not yet measured. Keep the story as a hypothesis you can log, not as the reason for a trade.

Unfinished business: a description first

A poor high says the night’s buyers stopped at a price without anyone trading through it to find out where sellers were. Single prints say the market crossed a zone too fast to build two-sided trade. Both are honest descriptions of how the night auctioned Definition.

Myth / hypothesis: “Unfinished business is a magnet: resting orders cluster there and the auction must come back to complete it, so a poor high or single prints are the day’s hidden targets.” Lore Tested on NQ by a public practitioner study and on the Nasdaq index proxy by our lab: poor extremes were not revisited more often than tailed extremes or random prices at the same distance, and single-print zones were not filled or respected more often than chance. Numbers below.

So on the sheet, a poor high or a single-print zone becomes a reference to watch (mốc cần theo dõi): a price where you ask the acceptance question from M4.01 and where a plan can put its invalidation. It is not a price the market owes you.

Why it is still worth knowing

• Shared vocabulary. Desk notes, Market Profile books and other traders’ plans use these words. You need to read them.
• Describing the auction. A night that left a flat high and a thin leg behind it is a different morning from a night that rotated quietly. The description helps you notice when the day starts doing something new.
• Framing risk. A poor high or the edge of single prints is a natural line for an if-then plan: acceptance through it changes the description, so it is a sensible place to write an invalidation.
• A hypothesis you can test. “Unfinished business gets finished” is a clean, loggable claim. The drill below shows how.

What the data says

Our lab also tested the overnight high and low themselves: they were touched and respected at the same rate as random prices at the same distance from the open Measured: no edgeNasdaq index (numbers in M2.11). Put together: the night’s extremes and its unfinished business are good places to ask a question, and no test so far shows they are good places to expect an answer.

Worked example: the poor high on the sheet (synthetic)

The night in the chart. NQ rallied from 18,000 to 18,070 in the Asia–London handoff, then balanced 18,050–18,070 into the US morning. The high, 18,072.00, printed in two periods with no tail. The fast leg left the 18,015–18,025 rows almost empty. The prior close was 18,010, so nearly all the night’s volume traded above it: net long.

The sheet at 09:25 ET (21:25 ICT):

• Inventory: net long, open expected near the top of the night’s value. Overnight buyers mostly in profit.
• References to watch: the poor high 18,072.00; the night’s VAL 18,050; the single-print zone 18,015–18,025.
• If-then, not a forecast: “If RTH trades above 18,072 and builds time there, the night’s high is accepted: lean long, invalid back below 18,068. If RTH is rejected at 18,072 and trades back below 18,050, lean short, next reference the thin zone, invalid back above 18,060. Between the two, no lean.”

What happened. At 09:34 ET NQ traded 18,074.25, printed a long upper wick and was back at 18,062 by 09:41. That is the rejection branch’s first half, decided by the plan’s own rule; the short lean still waits for a trade below 18,050. The trader with the sheet did not buy the “new high”; the trader without it did. Note what the sheet did not do: it did not predict that the poor high would be touched. On this day it was. On many days it is not.

The bias line is a lean, not a position: “long while above 18,068” carries its condition, and the rejection branch was written before the temptation arrived. A bias without a condition is just an opinion with a timestamp.

The mirror and the failure

Mirror (net-short night). A night that sold off and balanced near its low, leaving a poor low and single prints above. Flip every line: acceptance below the poor low means the short inventory is being extended (invalid back above it); a rejection that reclaims the night’s VAH means it is being unwound (invalid back below it).

Failure: the poor high nobody came back for (synthetic). Same kind of night: poor high at 18,072.00, single prints at 18,015–18,025. This time the open prints 18,041, below the night’s value. NQ trades down through 18,025 and the thin zone, and spends the morning near 17,990. The poor high is never revisited that session. If the sheet had said “upside target 18,072”, it would have been wrong all day; written as a reference with two branches, it simply never came into play. M2.11 walks through a real night (August 2026) where a textbook poor overnight high was left unvisited all session.

Two days, two outcomes: that is what an untested story looks like from the inside. The studies above count thousands of extremes instead of remembering two.

Common mistake: Treating a base rate as an edge. “Poor highs get revisited a lot” can be true and still be useless: nearby prices get revisited a lot, whatever they are. In our lab’s test, prior poor extremes were touched slightly less often than random prices at the same distance. A revisit rate means something only next to a placebo.

Common mistake: Using the overnight range as support and resistance without a plan. Buying the overnight low “because it is the overnight low” trades geometry, and our lab found the overnight extremes respected like random prices. Use the line as an acceptance question with an invalidation, or do not use it.

Common mistake: Weighting a level by the night’s volume or trend as if that were tested. Heavy, trending nights do leave more positions near the price, and the sheet should say so. Whether that makes their extremes or unfinished business behave differently is not yet measured. Record it; do not size up because the night “meant it”.

Drill: log the night’s unfinished business

For the next ten sessions, before 09:30 ET:

1. Mark every poor overnight high or low and every overnight single-print zone (thin rows on the overnight profile).
2. For each, write one acceptance branch and one rejection branch, each with an invalidation price.
3. Mark one random price at the same distance from the pre-open price as a control.
4. After 11:00 ET, record for each reference and for the control: touched or not, and if touched, accepted or rejected by your written rule.

What we don’t know yet

• Whether overnight poor extremes and single prints, as opposed to the prior regular session’s, behave differently from random prices on NQ futures. Not yet measured: our lab’s test used regular-session profiles on the index proxies.
• Whether a heavy or trending night changes how its extremes and unfinished business behave at the open. Not yet measured.
• Whether order-flow confirmation at one of these references (a written, scorable rule, M4.09) adds anything over the reference alone. Not yet measured.

Recap

• Read the night for the sheet: range, where volume sat, trended or balanced, and who is underwater at the open. That is context, not a direction.
• Poor highs and lows and single prints describe where the night moved on without two-sided trade.
• “Unfinished business gets finished” is Lore: not supported on NQ and no better than random prices on the index proxies.
• Put these prices on the sheet as references to watch, each with an acceptance branch, a rejection branch and an invalidation.
• Write the bias as a conditional lean with its trap named in advance, never as a position.

Quiz

Further reading

• James Dalton and co-authors, Mind Over Markets and Markets in Profile: overnight inventory and poor structure in the auction framework. Read them as description; the directional rules are the ones tested above.
• Following the Auction: Market Profile Basic Language: single prints and unfinished auctions in plain English.
• Order Flow, Measured: all claims: the public practitioner study behind AP-05, AP-07 and OI-10.
• Our lab: poor extremes and single-print edges of the prior session were touched and held about as often as random prices at the same distance (QQQ and SPY, 656 sessions), and no TPO rule passed its holdout.

Prerequisites: M2.11 Overnight inventory (how to measure the night), M4.05 Initial Balance in session prep · Next: M4.07 Daily, weekly & monthly level map, where these references join the rest of the map and are checked against random levels · Connects to: M2.08 (single prints), M2.09 (poor highs & lows), M4.01 (acceptance), M4.08 (the morning sheet), M4.09 (writing a confirmation rule)

Educational content only, not financial advice. Futures trading involves substantial risk of loss.