Absorption & exhaustion

It is 09:38 ET (21:38 ICT, winter). NQ has slid ten points from the open into 20,400.00, a level on your map from yesterday’s profile. In the next fifty seconds about 1,860 contracts sell into the bid. Volume per minute is four times what the last half hour printed. Price prints one tick under the level, then sits there. Someone is buying everything that is sold.

The tempting conclusion is “buyers are defending, go long”. This lesson is about the gap between that print and that conclusion: what absorption and exhaustion look like, what they tell you for certain, and what they do not.

Key terms

Absorption (hấp thụ): aggressive orders trade heavily at a price and the price barely moves, because resting orders on the other side keep taking the other side of every trade Definition. On a footprint you see unusually large volume at one or two prices, delta strongly with the aggressor, and a small range for that much volume.

Exhaustion (kiệt sức): a push ends in a climax bar (the widest range and the largest delta of the move, often the highest volume) and the following bars fail to extend it Definition. The difference from absorption is the range: absorption compresses, exhaustion stretches and then stops.

Term you need: delta. Delta is volume traded at the ask minus volume traded at the bid in a bar or at a price. Negative delta means sellers were the aggressors. M3.04 covers it in full.

Chart first: effort without result

How it works

Absorption: effort without result

Every trade has a buyer and a seller. When sellers hit the bid 1,860 times in a minute and the bid does not drop, someone with resting buy orders is filling all of it, and refilling as they are filled. On the footprint the absorbed prices show a heavy bid column, a strongly negative delta, and a bar range that is small for its volume.

What absorption shows for certain is limited: at that price, at that moment, resting demand was larger than the selling that arrived. It does not tell you how much demand is left, whether it will stay, or whether the sellers are finished. A resting order can be pulled at any time, and when the passive side finally fills or leaves, price often moves faster through the level than it moved into it.

Exhaustion: the last push

Exhaustion is the opposite range structure. A move accelerates into a climax: the widest bar of the session leg, the largest delta extreme, volume well above average, a close near the extreme. Then the next bars cannot add to it. Delta fades or turns, ranges shrink, closes step back.

Traders also use the word for the opposite print: the last push trades only thin volume at its extreme tick, because the aggressors have run out. Both versions describe the same idea, a push that cannot continue, and both were tested (box below).

A climax bar on its own is only volatility. Exhaustion is a label you can apply after the fact, once the following bars have failed to extend. The trader who “sells the climax” before that is guessing that this push is the last one.

What the print does not tell you

Myth / hypothesis: “Absorption precedes the reversal.” Lore The claim is widely taught: the wall holds, the aggressors give up, and price snaps the other way. As a forecast it has been tested on NQ and not supported: bars with absorption reversed about as often as bars without it (box below). Treat it as a hypothesis you could test, not as a rule.

Three endings follow the same absorption print, and the print does not choose between them. The resting buyer keeps holding and fresh buyers arrive: price reverses. The selling slows but nobody lifts the offer: price stalls and chops. The resting order fills or is pulled: price breaks through, often fast.

Exhaustion has the same problem Lore. Thin volume at the extreme tick and big volume surges at the end of a move were both tested as reversal markers, and neither beat the base rate; the surges leaned slightly against the claim.

Why it is still worth knowing

You still need these words. Absorption and exhaustion describe the auction in plain terms: where effort met resistance, and where a push ran out of buyers. They tell you where a stop is cheap (just past the absorbed price, where the read is plainly wrong) and where it is expensive (inside a climax bar). They flag that volatility is about to arrive, even if they do not say which way: footprint signals of this kind widened both the best and the worst excursions in the same public study, in 35 of 45 signals tested PlausibleOne trader's study. And they are exactly the kind of claim you will learn to test in EV1.04: write the rule down, compare it with a baseline, then decide.

Worked example: the bid at 20,400, long side

Synthetic session, built to the shape above, not a real date. NQ, 1-minute footprint, tick 0.25 points, $5 per tick per contract.

The 09:38 bar prints 2,350 contracts against roughly 600 per minute over the prior half hour. Delta is −1,420. The low is 20,399.75, one tick under the level; the high is 20,401.50 and the close 20,400.75. Most of the volume sits at 20,400.00 and 20,399.75 on the bid side. That is absorption by definition: heavy selling, one tick of progress.

You do not buy the print. You write the plan:

• If the next bars trade back above 20,401.50 with delta turning positive, the sellers’ effort has failed and buyers are now initiating. Long 1 contract at 20,401.75.
• Stop 20,399.00, three ticks under the absorbed low: 11 ticks of risk, $55 per contract before costs.
• Target 2R, 22 ticks, at 20,407.25. Manage it per your rules in M6.
• Invalid if a 1-minute bar closes below 20,399.75 with negative delta: the resting buyer is gone and you stay flat.

In this synthetic session the 09:39 and 09:40 bars print delta +380 and +510 and trade to 20,402.50. The trigger fills at 20,401.75. That is one ending, not the expected one.

The mirror and the failure

Short side. Flip the figure. Aggressive buying lifts the offer at a level, ask volume piles up, price gains a tick and stops. The plan mirrors: short only if price trades back below the absorbed prices with delta turning negative, stop a few ticks above the absorbed high, invalid on a close above it with positive delta.

The failure. Same structure on another synthetic morning: 09:51 ET, 2,100 contracts sell into 20,400.00, one tick of progress. The trigger never comes. At 09:53 the bid at 20,400.00 shrinks from about 300 contracts to 40 without trading (it was pulled), and the next bar trades 20,397.50 on delta −1,900. A trader who bought the print at 20,400.25 with the same stop at 20,399.00 loses 5 ticks, $25 per contract plus costs; a trader who waited for the trigger never entered. Absorption does not fail rarely. On the data in the box it “fails” about half the time, which is what no edge looks like.

The second figure shows the whole picture: the same print, then three endings, with the measured reversal rate next to the base rate.

Do it on the platform

Prop-firm note. The stop beyond the absorbed price is also the number your evaluation’s loss limits see. Size it from the stop distance, not from how strong the print looks; the Prop Firm course covers how a firm’s daily and maximum loss limits interact with stop distance.

Common mistakes

Common mistake: Treating a base rate as an edge. “Absorption reversed 51% of the time” sounds like a coin with a slight lean. Without the rate for bars without absorption (also 51.1%) the number says nothing about absorption.

Common mistake: Entering inside the print. Buying while the sellers are still hitting the bid is guessing that this wave is the last one. Wait for the bars after it: the release for absorption, the failure to extend for exhaustion.

Common mistake: Selling the climax bar. The widest, loudest bar of a move is maximum volatility, not a turning point. In the public data, end-of-move surges were slightly less likely than other bars to reverse.

Drill: score your own absorption prints

Over five sessions of NQ replay, mark every 1-minute bar at one of your pre-market levels whose volume is at least three times the prior 30-minute average and whose range is three ticks or less beyond the level. Before you look at what happens next, write down your outcome rule: for example, “reverse” means 8 ticks away from the level within 10 bars before 8 ticks through it.

Then mark the same number of ordinary touches of the same levels (no volume spike) as a baseline.

1. Log each event: time (ET), level, bar volume, delta, range in ticks.
2. Score each event as reverse, stall or break with the rule you wrote first.
3. Compare the reverse rate of absorption touches with the reverse rate of ordinary touches.

What we don’t know yet

• Whether absorption measured with order-book depth (the resting size before and after the hits) behaves differently from absorption read off the footprint. Our lab has no depth data yet: not yet measured.
• Our lab’s own replication of the public absorption result on NQ is planned but not run: not yet measured.
• Whether absorption helps as a stop-placement tool (smaller losses at the same win rate) rather than a direction signal: not yet measured.

Recap

• Absorption is heavy aggression with little price progress; exhaustion is a climax push that the next bars cannot extend.
• Both are descriptions you read from range, delta and volume; exhaustion is only confirmed by the bars that follow.
• As reversal signals both are graded Lore on NQ: tested in a public study, no edge shown against bars without them.
• Use them to locate cheap stops and to write if-then plans, and wait for the next bars before acting.

Further reading

• Order Flow, Measured: All claims. A public, pre-registered practitioner study on NQ, 2018–2026. Read the absorption (FP-01, FP-02, FP-12) and exhaustion (FP-04, DA-07) rows, then the study’s “Absorption test” and “Does a Wider Target Help?” pages for the two-bar shape and the excursion result.
• Cont, Kukanov and Stoikov (2014), “The Price Impact of Order Book Events”, Journal of Financial Econometrics 12(1). Order-flow imbalance explains price changes over the same interval; that is explanation, not forecast (EV3.03).
• Our lab: the absorption and exhaustion concept note grades both Lore as reversal signals and keeps them for stop and size decisions, not direction.

Next: M3.03 turns from single prices to runs of imbalanced prices (stacked imbalances), and applies the same test: describe first, then check the baseline.

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