Footprint Charts Explained: How to Read Bid, Ask, Delta, and Imbalances

Futures footprint charts show how many contracts traded at the bid and at the ask for every price inside a bar. Subtract bid volume from ask volume and you get delta. Compare one side against the other diagonally and you find imbalances. Together they show which side was aggressive at each price, which a standard candlestick compresses into four numbers.

What Is a Futures Footprint Chart?

A futures footprint chart replaces each candle with a ladder of prices and shows how many contracts traded at the bid and at the ask at every price. Bid volume is aggressive selling. Ask volume is aggressive buying. The grid shows which side was more aggressive at each price, which a standard candlestick hides.

A candle tells you where price opened, closed, and extended. It does not tell you whether the move to the high came from real buying or from a thin book. The footprint chart keeps that detail. It is one of the main tools in order flow trading, and it builds directly on the level-marking work in using a volume profile chart.

Footprint reading works best on liquid contracts such as ES, NQ, MES, and MNQ, where every price in a bar sees enough trades to mean something.

How Do You Read the Bid and Ask Numbers?

Each row is a price. The left number is volume that traded at the bid, where sellers hit resting buyers. The right number is volume that traded at the ask, where buyers lifted resting sellers. Every trade has a buyer and a seller, so these numbers show who initiated, not who owns the position.

Layouts differ by platform. Left bid and right ask is common, but check your settings. Some platforms show total volume per price, or show delta per price in a separate column. In Sierra Chart, the numbers bar study can display ask volume and bid volume at each price level, plus their difference, and each column can be configured separately.

Start by reading one bar at a time. Find the price with the most total volume, which is that bar’s own point of control. Then look at which side dominated above and below it.

What Is Delta on a Footprint Chart?

Delta is ask volume minus bid volume. Positive delta means buyers were more aggressive. Negative delta means sellers were. You can read it for a single price, a whole bar, or a session. Delta measures aggression, not future direction, so a bar can close higher on negative delta. That mismatch is worth noticing.

A bar that closes near its high with strongly positive delta shows buyers paid up to get filled. A bar that closes near its high with negative delta says price rose even though more volume traded at the bid. Either the move came from sellers stepping aside, or from passive buyers absorbing the selling. You decide which by looking at what happens next. Running totals across bars are covered in our guide to cumulative delta.

What Are Imbalances and Stacked Imbalances?

An imbalance is a cell where one side dominates by a set ratio, compared diagonally: ask volume at one price against bid volume one tick lower. A stacked imbalance is several consecutive levels dominated by the same side. Isolated imbalances are mostly noise. Stacked ones show sustained initiative worth watching closely.

The diagonal comparison matters. Aggressive buyers lift the offer at one price, while the aggressive sellers who oppose them hit the bid one tick below. Comparing the ask at a price with the bid directly below it lines up the two sides of the same fight.

What Imbalance Ratio Should You Use?

Many platforms default near 300 percent, meaning one side traded three times the other, and traders commonly tune between about 200 and 300 percent. No ratio is universal. Pick one setting per contract, keep it fixed while you test, and compare results across a full sample before you change it.

How Do You Read a Footprint Bar? A Worked Example

Here is a hypothetical ES bar with illustrative numbers.

Add the columns. Ask volume totals 351 and bid volume totals 167, so bar delta is +184 on 518 contracts. Now check diagonals at a 300 percent threshold. Ask at 5,101.00 is 52 against 14 bid at 5,100.75, about 3.7 times. Ask at 5,100.75 is 88 against 20 bid at 5,100.50, about 4.4 times. Ask at 5,100.50 is 120 against 55 bid at 5,100.25, about 2.2 times, which misses.

You have two stacked buy imbalances at the top of the bar, and heavy selling only at the bottom. That says buyers were the aggressors as price moved up. It does not say price will keep rising. It gives you a zone, roughly 5,100.50 to 5,101.00, to watch on a pullback.

Follow these steps on every bar you study:

1. Sum bid and ask volume to get bar delta.
2. Find the price with the most total volume.
3. Check diagonal ratios against your fixed threshold.
4. Mark any stacked imbalances.
5. Note where the bar closed relative to its delta.
6. Wait for price to return to the zone before acting.

How Do You Use Footprint Charts to Trade?

Use the footprint to confirm or reject a level you already marked, such as a prior value area edge. Heavy aggressive volume at a level with no price progress suggests absorption. A stacked imbalance that holds as support or resistance suggests initiative. Never trade a cell alone. Context comes first.

Take absorption. Price rallies into a marked level and the footprint shows heavy ask volume at the high, yet price stops advancing. Buyers lifted offers repeatedly and the offers did not give way. That can mark a failed push.

Stacked imbalances work the other way. After a strong move, a stacked buy imbalance near the low of the move can act as support when price returns, because aggressive buyers already showed their hand there. Treat these zones as hypotheses and test them in simulation first. Define your stop and size from your risk, not from margin. The Ironbeam day margins table shows what you need to post.

What Do You Need to Use Footprint Charts?

You need tick-level trade data and a platform that builds footprint bars. Ironbeam, a professional futures broker, supports Sierra Chart, whose Numbers Bars display ask and bid volume per price, and Bookmap. Ironbeam’s cloud-based futures trading platform covers everyday execution. Confirm the footprint feature set for your platform and data plan before you subscribe.

Sierra Chart at Ironbeam is a strong fit for traders who want deep chart customization and direct order routing, and the Sierra Chart platform page explains the Teton routing setup. Bookmap adds heatmaps and volume delta for traders who want to see resting liquidity.

Compare every supported option on the Ironbeam trading platforms page. If you trade fast, our guide to futures platforms for scalping covers speed and data. For exchange background on the contracts you trade, see CME Group education. 

When you’re ready, open a futures account.

Frequently Asked Questions

What is a footprint chart in futures trading?

A footprint chart shows how many contracts traded at the bid and at the ask at every price inside a bar. It reveals which side was more aggressive, which a standard candlestick does not show.

What does delta mean on a footprint chart?

Delta is ask volume minus bid volume. Positive delta means buyers were more aggressive, and negative delta means sellers were. It measures aggression, not future price direction.

What is a stacked imbalance?

A stacked imbalance is several consecutive price levels where one side dominates the other by a set ratio. It shows sustained aggressive buying or selling, and traders watch these zones when price returns.

What imbalance ratio should I use?

Many platforms default near 300 percent, and traders often tune between 200 and 300 percent. No setting is universal, so keep one ratio fixed while you test.

Are footprint charts good for beginners?

They can be, if you start with one contract and one setup. Learn to read bid, ask, and delta on a single bar before you add imbalances, and practice in simulation first.