A footprint chart shows the volume traded at every price, split into buyers and sellers. Once you can read the numbers, the next step is recognizing the patterns those numbers form — the recurring prints that experienced order flow traders scan for. This article catalogs the classic footprint patterns: what each looks like, what it suggests, and which ones ATAS can highlight automatically. (New to the footprint itself? Start with What Is a Footprint Chart — this article builds on it.)
(Quick note: nothing here is financial advice. Every pattern below is a tendency, not a promise.)
First, how imbalances are read
Most footprint patterns are built from imbalances — and the comparison is diagonal, not side-by-side. The ask volume at one price is compared to the bid volume one tick lower: buyers lifting the offer versus sellers hitting the bid around the same fight. When one side is a set percentage bigger, the level is marked as an imbalance.
The threshold is a convention, not a law. The number most educators teach is 300% (three times the other side), and it's adjustable in the settings. There is no objectively correct setting — it depends on the instrument and timeframe. One filter matters more than the ratio: minimum volume. Four contracts against one is technically a "400% imbalance" and means absolutely nothing.
Stacked imbalances
What it looks like: three or more consecutive price levels in one candle, all imbalanced in the same direction.
What it suggests: one aggressive participant — likely too big to fill at a single price — pushing with initiative. The stacked zone often acts as support or resistance on a retest, because whoever built it tends to defend those entries.
The flip side is the signal too: when price later trades straight back through a stacked buying zone, that aggression failed — a warning that feeds the trapped-traders pattern below.
In ATAS: fully automatic. The footprint's Bid×Ask Imbalance mode highlights single imbalances, and the dedicated Stacked Imbalance indicator finds the stacks — you set the ratio, the number of consecutive levels, and a volume filter, and it draws the zones as extended levels.
Unfinished auction
What it looks like: at a candle's extreme, volume printed on both sides. A "finished" high shows a zero on the bid side (buyers gone); a high with trade on both sides means the auction there never completed.
What it suggests: the market left unfinished business, and such levels often get revisited. Honest print: this magnet effect is a tendency, not a guarantee — strong trends leave unfinished auctions behind untested. Treated as a level of interest, it pairs naturally with naked POCs — both are "the market may come back here" levels.
In ATAS: automatic — the Unfinished Auction indicator marks the level and keeps the line on the chart until price returns to finish it. Use the volume filter, or small timeframes will spray these everywhere.
Absorption and exhaustion (the short version)
Both end trends, in opposite ways. Absorption: huge volume at the extreme, but price stops moving — passive limit orders eating all the aggression. Exhaustion: the volume itself dries up at the extreme — the aggressors simply ran out. On the footprint: absorption is big numbers, no progress; exhaustion is small numbers at the end of the move.
These two deserve their own article, and they have one: Absorption vs Exhaustion.
Delta patterns: the flip and the divergence
Delta — buys minus sells — has two classic prints at extremes. The delta flip: a run of strong positive-delta candles into a high, then a candle where delta suddenly swings negative — aggression changing sides. And divergence: price makes a new high, but delta (or cumulative delta) doesn't confirm it — bullish price on weakening flow.
Both are warnings rather than triggers. The mechanics live in Delta & Cumulative Delta.
Trapped traders
What it looks like: heavy aggression at the very extreme of a move — stacked buying imbalances right at the top — followed by an immediate reversal within a few candles. The buyers who chased the high are now all underwater.
What it suggests: their exits become fuel for the move down. Nobody is literally "trapped" — everyone can exit — but forced covering is a real and repeatable pressure.
In ATAS: no button for this one, because it's a sequence: an imbalance signal that fails. Which is a useful way to think about the whole catalog — knowing what a pattern's failure looks like is as valuable as the pattern.
Volume nodes inside the candle
One cluster far bigger than the rest — a high volume node — marks where the real business was done; it acts like an intrabar point of control, often revisited and defended. Rows of near-zero volume — thin prints — mark where price moved too fast for trade; price tends to move quickly through that air again. ATAS's Cluster Search indicator can flag abnormal clusters automatically by volume, delta, or trades.
The rule above all patterns: location
A stacked imbalance in the middle of nowhere is noise. The same print at yesterday's value area low is a trade idea. Every pattern in this catalog earns its meaning from where it prints: previous day high and low, the POC, the value area edges, naked POCs. Pattern is the trigger; level is the reason. Order flow traders who skip the map end up reading candles like tea leaves.
Common mistakes
- Treating every highlighted imbalance as a signal — at default settings there are dozens per session.
- No minimum-volume filter, so tiny prints create "huge" percentage imbalances.
- Pattern-hunting without levels (see above — it's the big one).
- Wrong timeframe: 1-minute footprints spray patterns everywhere; too-high aggregation smears them away.
- Copying thresholds between instruments — ES, NQ and CL each need their own tuning.
What you need
A platform with a proper footprint. ATAS highlights imbalances and stacked imbalances, marks unfinished auctions, and its Cluster Search finds abnormal volume automatically — most of this catalog, marked for you, with a free trial to practice on.
The bottom line
Footprint patterns are the recurring prints of aggression, absorption and abandonment: stacked imbalances, unfinished auctions, delta flips, trapped traders, and the volume nodes in between. ATAS can mark many of them automatically — but no setting replaces the two judgments that matter: is there real volume behind the print, and is it happening at a level worth caring about?