Absorption
When passive limit orders absorb aggressive market orders WITHOUT price moving — a hidden wall that reveals large institutional resting liquidity.
Absorption is the opposite of Imbalance. It occurs when a large volume of aggressive orders hits a price level, but price does NOT move. The passive side (limit orders resting on the book) is absorbing the aggression without giving ground.
What it looks like on a Footprint Candle:
- ●A price level shows enormous total volume, but the candle body barely moves past it.
- ●Both the bid and ask columns are large (heavy two-sided trading), but the net Delta is near zero — buys and sells are canceling out.
- ●Price repeatedly tests the level but fails to break through.
What Absorption reveals:
- ●An institution or market maker has resting orders at that level and is deliberately absorbing aggression to fill a large position.
- ●The level becomes a powerful support or resistance zone — as long as the passive player's orders hold.
- ●When Absorption finally fails (the resting orders are exhausted), the breakout through that level tends to be violent — all the trapped traders on the wrong side scramble at once.
The "Big Number Trap": Absorption frequently occurs at round numbers (5800, 5900, 6000 on SPX) because dealers cluster hedging orders at these levels, and retail traders pile stop-losses just beyond them. The round number absorbs multiple pushes, trapping breakout traders, then reverses — or one final push exhausts the wall and a genuine breakout follows with acceleration.
SPXXL's proxy: the engine detects Absorption-like behavior through a combination of scores.liquiditySweep and relativeVolume in the 6-Step Read (Step 5). High volume but minimal price progress (tight candles with big wicks) maps to Absorption. The Liquidity Sweep session classification itself is often the macro-level expression of Absorption → Breakout failure → Reversal.
For 0DTE traders: recognizing Absorption saves you from chasing breakouts that will fail. When SPXXL's Order Flow widget shows Step 5 "Absorption" as unconfirmed, it means there is no sign of passive resting liquidity being overcome — the trend may stall.
This entry is educational and uses SPX for illustration — it is not financial advice, and no outcome is predicted or guaranteed.
Related Terms
A lopsided ratio of buying-to-selling volume (or vice versa) at a specific price level — a signal that one side is overpowering the other.
The real-time stream of buy and sell orders hitting the market — the raw aggression behind every candle, revealing who is in control before the chart shows it.
An advanced candle type that displays the volume transacted at each price level within the bar — showing the bid×ask split that a standard candle hides.
A session where price probes beyond key levels to trigger clustered stop-loss orders before reversing — designed to trap directional traders.
The dealer desks that quote and take the other side of SPX options trades — their delta and Gamma hedging of 0DTE flow is now one of the strongest forces shaping intraday SPX price action.
The aggregate Gamma positioning of options market makers — determines how dealer hedging amplifies or dampens SPX price moves.
When price makes a new high (or low) but the cumulative Delta does not — a signal that the aggression behind the move is exhausting.