What is absorption in order flow? How to read it on NQ

By the Mercury Flow team · 15 October 2026 · 6 min read

Absorption is one of the most talked-about ideas in order-flow trading, and one of the most misunderstood. Here's what it is, how to spot it on an NQ footprint chart, and what our own testing says about using it.

Absorption in one sentence

Absorption is heavy aggressive trading at a price that fails to move the market. Sellers hit the bid again and again, but price doesn't go lower, because resting buy orders keep taking the other side. Or the reverse at a high.

What it looks like on a footprint chart

A footprint chart splits each candle's volume into what traded at the bid (sellers hitting) and at the ask (buyers lifting). Absorption usually shows up as:

• Very large volume at one or two prices near the low (or high) of a bar, much more than the bars around it.
• Little price progress: the bar closes near where that volume traded instead of extending.
• A key level underneath: a prior session low, value-area edge or high-volume node. Absorption in the middle of nowhere means much less.

Why the location matters more than the volume

Big volume alone happens all day on NQ. What makes absorption interesting is where it happens. At a level many traders watch, a wall of passive orders that soaks up aggressive selling tells you someone is defending that price. In the middle of a range, the same print is usually just a busy minute.

That's why Mercury Flow starts with context (which levels matter today) before behaviour (what happened when price got there).

Absorption is not an entry signal on its own

This is where most content online oversells the idea. We tested absorption-style events on years of ES and NQ data. Taken alone, at 15 to 60 minutes, they did not reliably predict direction. Heavy absorbed selling at a level was followed by higher prices about as often as lower ones.

What matters is the response afterwards:

• Does price reclaim the level and hold above it?
• Does aggression flip, with buyers now lifting the offer?
• Did a stop run through the level close back inside?

Treat absorption as a reason to pay attention, and the confirmation as your reason to act, with a stop beyond the level.

Absorption vs. exhaustion

Exhaustion is the opposite picture: volume dries up at the extreme of a move. Nobody wants to keep pushing. Absorption is a fight; exhaustion is a fade-out. Both can appear at the end of a move, and both need confirmation.

A simple checklist

1. Is price at a level that matters today (prior session high/low, value area, naked POC)?
2. Is there unusually heavy aggressive volume with little progress?
3. Did the next bars confirm (reclaim, flip in aggression, failed breakout)?
4. Is your stop beyond the level, and is there room to the next liquidity for a target?

Mercury Flow draws each of these on your DeepCharts chart: the levels, the large orders, the absorption marker and the trade plan, so you can run this checklist at a glance.

Futures trading involves substantial risk. This guide is educational, not financial advice.