Distinguish absorption from exhaustion in order flow

What absorption and exhaustion mean in executed flow

A candidate sell-side absorption event has substantial seller-initiated trading but limited downward progress over a stated window. Passive bids, including replenishing orders, may be meeting the selling. The useful observation is large executed pressure with a muted price response, not the assumption that a particular institution is defending a level.

Exhaustion instead describes fading aggressive participation. Price may stop declining because fewer sellers continue to cross the spread. Low activity can precede a reversal, a pause or another leg down once sellers return. Absorption and exhaustion can occur in sequence, but neither label by itself establishes a profitable entry.

Measure volume, delta and price response in one window

Compare flow and price over the same duration, instrument and venue set. A 300-unit trade burst is not large merely because the number looks large; compare it with normal activity for that market and session. Record total volume as well as delta. A small net delta can hide very active two-way trading.

Watch what happens after the pressure meets the level. Does price regain a predefined boundary? Do bids replenish after actual executions, or does displayed liquidity disappear? Can sellers push through on the next attempt? These observations help reject the hypothesis, whereas naming an invisible “whale” adds no testable information.

Example: 100 to 99.95 on 300 vs 30 units of volume

Prices in this example are USD per asset unit; all volumes are asset units. In two hypothetical one-minute windows, price moves from 100 to 99.95. Window A contains 270 units of aggressive selling and 30 of aggressive buying: total volume 300, delta −240. Window B contains 19 units of selling and 11 of buying: total volume 30, delta −8.

Window A is compatible with absorption if that selling is unusually large and bids hold through executions. Window B is compatible with exhaustion if activity has faded from the preceding decline. The equal price change does not make the mechanisms equal. For either case, require a separately specified price response before testing a reversal trade.

Absorption can fail when replenishment stops

Repeated heavy selling at a stable price may consume available demand. If bids stop replenishing, the next sell wave can move price sharply lower. The earlier absorption observation was not necessarily false; the condition changed. A trade plan needs invalidation and executable risk controls rather than a belief that a defended level must hold forever.