# Delta Footprint: Reading Net Aggression at Every Price

> Delta footprint explained: how the single net number per row works, how to read intrabar delta, and when to use it over bid x ask.

- Canonical: https://traderprofesional.com/en/delta-footprint/
- Site: Trader Profesional (https://traderprofesional.com) — order flow trading
- Language: en
- Published: 2026-07-17

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The delta footprint takes the two numbers of a bid x ask cell and collapses them into one: the net aggression at that price. Instead of `120 x 340` you see `+220`. It is the fastest footprint display to read once your eye is trained, and it is built for scanning momentum bar by bar without drowning in raw totals.

This guide covers the delta footprint as a *display type*. Delta as a concept, and cumulative delta across the session, get their full treatment in the [cumulative delta guide](/en/cumulative-delta/); here we stay on how the number lands inside each footprint cell.

## What the number on each row means

Delta is simply aggressive buying minus aggressive selling:

**Delta = volume at the ask − volume at the bid**

On a bid x ask footprint that `120 x 340` row means 120 sold aggressively, 340 bought aggressively. The delta footprint does the subtraction for you and prints `+220`. Positive means buyers were the aggressors at that price; negative means sellers were. The size of the number tells you by how much.

So a delta footprint bar is a stack of signed numbers, one per price row. Green for positive, red for negative on most platforms, with the shade often scaled to size. You read it as a column of net aggression from the low of the bar to the high.

## Reading an intrabar delta column

Here is the same small ES bar from the bid x ask world, translated into delta:

| Price | Delta |
|-------|-------|
| 5,404 | +350 |
| 5,403 | +430 |
| 5,402 | +160 |
| 5,401 | −120 |
| 5,400 | −440 |

Now the read is much faster:

1. **Follow the sign flip.** The bottom two rows are red (sellers aggressive), the top three are green (buyers aggressive). Control changed hands mid-bar, sellers pushed the low, buyers took the rest.
2. **Weigh the extremes.** The `−440` at 5,400 is the heaviest single figure. Sellers threw real aggression at the low and price still closed up near 5,404. That is aggression that failed, the fingerprint of buyers passively soaking up sellers at the bottom.
3. **Sum for bar delta.** Add the column: roughly +380 net. A green candle with positive bar delta, but one that had to eat a −440 fight at its low first.

That whole read took seconds. The delta footprint's job is exactly this: let you scan bar after bar for where net aggression sits and where it flips, without your eye parsing two numbers per row.

## Bar delta vs cumulative delta

Two levels of delta matter, and it is worth keeping them straight.

- **Intrabar / per-row delta** is what the delta footprint shows: net aggression at each price inside one bar.
- **Bar delta** is the sum of a single bar's rows, often printed at the base of the candle.
- **Cumulative delta (CVD)** is the running total of bar delta across the whole session, plotted as its own line or bars.

The delta footprint owns the first two. The running total is a different tool with its own signals, divergences, resets, sweeps, and it lives in the [cumulative delta guide](/en/cumulative-delta/). Do not try to read a whole session's trend off a single bar's colored cells; that is what CVD is for. Use the delta footprint for the *inside* of the bar, CVD for the story between bars.

## What the delta footprint is good at

The display shines in a few specific spots:

- **Spotting the flip point.** Where red turns to green (or the reverse) inside a bar marks where aggressors changed sides. That row is often the intrabar pivot and a level to mark.
- **Momentum scanning.** A run of deep-green bars, each with strongly positive rows, reads as sustained aggressive buying at a glance. You see the momentum without adding up anything.
- **Divergence at a level.** Price makes a new high but the top rows print weak or negative delta, buyers are not backing the move aggressively. That intrabar hint often precedes the full [delta divergence](/en/delta-divergence/) picture you would confirm on CVD.

## Where it falls short

The delta footprint hides the raw totals, and that costs you two things.

First, you lose the ability to eyeball the diagonal for imbalances. A `+220` tells you buyers netted 220, but not whether that was `120 x 340` or `10 x 230`, and the [imbalance](/en/order-flow-imbalances/) read depends on the actual ask-vs-bid-below comparison. If imbalances are central to your setup, you want the two numbers, which means [bid x ask](/en/bid-ask-footprint/).

Second, a small delta can hide huge two-sided volume. A row printing `+20` might be `600 x 620`, a massive, evenly matched fight, or it might be `5 x 25` of nothing. The net looks identical; the meaning is opposite. The [volume footprint](/en/volume-footprint/) or the raw bid x ask fills that blind spot.

That is why most traders do not pick one display forever. They read decisions on bid x ask and scan context on delta, toggling between them. How to set that up, colors, thresholds, which display on which timeframe, is in [footprint chart settings](/en/footprint-chart-settings/).

## A practical way to use it

My own habit: delta footprint on the context timeframe for a fast momentum read, bid x ask on the decision timeframe where I need the diagonal and the raw split. When the delta footprint shows a clean flip at a level I care about, I drop to bid x ask to confirm what actually happened, was that flip an imbalance, an absorption, or just churn?

The delta footprint is a scanning tool, quick, directional, momentum-friendly. Pair it with the raw layout for the moments that matter, and lean on [cumulative delta](/en/cumulative-delta/) for the between-bar story. The way all of these fit into one read is laid out in the [order flow trading guide](/en/order-flow-trading/).

## Frequently Asked Questions

### What is a delta footprint?

It is a footprint display that shows one net number per price row, aggressive buying minus aggressive selling (ask volume minus bid volume). A row reading `+220` means buyers were the aggressors there by 220 contracts. It is a faster-to-scan alternative to the two-number bid x ask layout.

### How is the delta footprint different from cumulative delta?

The delta footprint shows net aggression *inside* each bar, one number per price row. Cumulative delta (CVD) is the running total of bar delta across the whole session, plotted as its own line. The footprint is for reading the inside of a bar; CVD is for the trend between bars.

### When should I use a delta footprint instead of bid x ask?

Use the delta footprint when you want to scan momentum quickly and see where aggression flips inside a bar. Switch to bid x ask when you need the raw two-number split, to read imbalances on the diagonal or to check whether a small net delta is hiding a large two-sided fight.

### Can a positive delta row still be bearish?

Yes, in context. A row of positive delta at the top of a stalling move can mean buyers are chasing into resistance right before it fails. Delta measures aggression, not outcome, so you always read the number against where price is and what happens next, not in isolation.