Footprint Chart: How to Read Order Flow, Bid/Ask Volume and Delta

What is a footprint chart?

A footprint chart opens up each candle and shows the volume that traded at every price inside it, split into aggressive buying and aggressive selling. A normal candle tells you four prices: open, high, low and close. A footprint shows the fight that produced them.

Each row reads like 310 × 360: 310 lots sold into the bid and 360 lots bought at the ask, at that price. Read down the candle and you see where buyers and sellers were active, not just where price ended up. That is the foundation of order flow trading.

This pillar guide explains how to read a footprint chart from zero: bid ask volume, delta, the POC per candle, imbalances, absorption and exhaustion, and how traders combine them with levels on NIFTY and BANKNIFTY futures.

Order flow basics: bids, asks and aggression

Every market has a bid (the highest price someone will pay) and an ask or offer (the lowest price someone will sell at). Traders who place limit orders wait on the bid or ask; they are passive. Traders who use market orders cross the spread; they are aggressive.

• An aggressive buyer lifts the offer. The trade prints at the ask and counts as ask volume.
• An aggressive seller hits the bid. The trade prints at the bid and counts as bid volume.

Price moves when aggressive orders use up the passive orders at a price. If buyers keep lifting offers faster than sellers replace them, the ask moves up. The footprint records that process price by price.

Why aggression matters

Aggressive traders pay the spread because they want to be filled now. That urgency often comes from stops, breakouts, news or large orders being worked. Knowing where urgency appeared helps explain why price moved and where it may react later.

How to read a footprint chart: the layout

Footprint styles vary, but most show the same information:

• Bid × Ask: bid volume on the left, ask volume on the right, for each price row.
• Delta footprint: a single number per row, ask minus bid.
• Volume footprint: total volume per row, often shaded as a mini profile.

Below or above each candle you usually see total volume and candle delta. Colours mark imbalances and the candle's point of control.

Rows and tick size

NIFTY futures move in very small ticks, so footprints group prices into rows, for example 0.5 or 1 point for NIFTY and larger for BANKNIFTY. Too small and the candle is unreadable; too large and detail disappears.

Reading one candle

1. Look at total volume: was this candle busy or quiet?
2. Look at delta: did buyers or sellers dominate aggression?
3. Find the POC: where did most of the trading happen?
4. Look at the extremes: heavy or thin volume at the high and low?
5. Look for imbalances, especially stacks.

Delta: who was more aggressive

Delta is ask volume minus bid volume. A candle with delta +1,300 had 1,300 more lots of aggressive buying than selling. Delta is not the same as direction: a green candle can have negative delta when sellers hit hard but could not push price down, which is itself useful information.

Cumulative delta

Adding up candle delta through the session gives cumulative delta (CVD). Rising CVD with rising price shows aggressive buying supporting the move. When price makes a new high but CVD does not, that is delta divergence, a sign of weaker participation.

Delta at the extremes

Large negative delta at a candle's low with a close near the high often means selling was absorbed. Large positive delta at a high with a weak close often means buying was absorbed. Context decides which matters.

Point of control (POC) per candle

The price with the most volume inside a candle is its point of control. It shows where the candle's business was done.

• POC near the high of an up-candle: most trading happened at the top. Buyers accepted higher prices.
• POC at the bottom of an up-candle: the rally ran on thin volume above. It may be less accepted.
• POC in the middle: a balanced candle with two-sided trade.

The session-level version of this idea is covered in point of control and volume profile. A candle POC is the same concept on a much smaller scale.

Imbalances and stacked imbalances

An imbalance compares buying at one price with selling one tick lower (the diagonal, because buyers lift the offer while sellers hit the bid below it). When one side is several times the other, commonly 3× or 300%, that price is marked.

Three or more imbalances on top of each other form a stacked imbalance. It shows one side pushing through several prices in a row. Traders often watch stacked imbalances as support or resistance when price returns.

The full method, including ratios, volume filters and how zones hold or fail, is in the order flow imbalance guide.

Absorption, exhaustion and trapped traders

Absorption

Heavy selling at a price, yet price does not go lower. Someone passive is buying everything thrown at them, often with refilling iceberg orders. At a support level this is one of the most watched footprint patterns.

Exhaustion

Volume dries up at the extreme of a move. The last buyers at the high are few, and the move is running out of fuel.

Trapped traders

Big aggressive volume at a price that is then rejected. Those traders are now losing and may have to exit, which can fuel the move the other way. This links to the idea of a liquidity trap.

See absorption vs exhaustion for how to tell them apart in detail.

Footprint chart patterns traders study

Beyond single prints, a few recurring footprint shapes are worth learning, because they appear again and again on NIFTY and BANKNIFTY futures.

Unfinished auction

Normally the very top and bottom price of a candle show light volume on one side, because the auction found no one willing to trade further. When both bid and ask show meaningful volume at the extreme, the auction is considered unfinished, and many traders expect price to revisit that price later.

P-shape and b-shape candles

When most of a candle's volume sits in its upper part with a thin tail below, the footprint profile looks like the letter P. It often appears during short covering, where buyers rushed in and then trade settled at higher prices. The opposite, a b-shape, has volume clustered low with a thin tail above, often seen when long positions are being liquidated.

Delta flip

A run of candles with strongly negative delta followed by a candle with strongly positive delta at the same level is a delta flip. It suggests the aggressive side changed. At a planned level, it is often the first footprint clue that a move is stalling.

Low-volume pockets

Prices inside a candle with very little traded volume show where price moved too fast for two-sided trade. These thin areas behave like small low volume nodes and price often moves through them quickly on a revisit.

Choosing timeframe and settings

There is no single best footprint setting, but some choices make learning easier.

• Time-based candles (1, 3, 5 minutes) are the most intuitive and line up with your normal chart.
• Range or volume candles close after a fixed price move or volume, which keeps footprints comparable through quiet and busy periods.
• Row size should keep around 15 to 40 rows in a typical candle.
• Imbalance ratio of 300% with a minimum volume filter is a sensible default.

Whatever you choose, keep it fixed for a few weeks. Order flow reading is pattern recognition, and patterns only become familiar when the display is consistent.

Footprint chart vs volume profile vs candlesticks

They work together. Volume profile and key levels tell you where to look. The footprint tells you what happened when price got there.

A footprint trading process at a level

A footprint is most useful at a level you already care about: a prior high or low, an order block, a volume profile node, the value area edge or VWAP. In the middle of nowhere, it is just numbers.

1. Plan levels before the open. Mark the previous day high, low, POC and value area.
2. Wait for price to reach a level. Do not read every candle all day.
3. Read the footprint at the level. Absorption, exhaustion, a stack, or delta divergence?
4. Look for confirmation. The next candle should support the read, for example price moving away with delta in the same direction.
5. Define where it is wrong. If price trades through the level with strong aggression, the read is invalid.
6. Size the position so a wrong read is affordable. See risk management.

Worked example on NIFTY futures

An illustration with plausible numbers.

The previous day's low on NIFTY futures was 24,450. Today price sells off and reaches 24,452 at 10:40 IST. The 5-minute footprint at the low shows 2,600 lots sold at the bid across 24,452–24,454 and only 700 bought at the ask. Price does not print 24,450. The candle closes at 24,468 with delta −1,200 and its POC at 24,453.

That is heavy selling with no progress at a planned level: absorption. The next candle shows buying imbalances stacked from 24,462 to 24,464 and delta +900. Price moves to 24,495 over the next half hour.

Had price instead traded 24,445 with a stacked selling imbalance, the absorption read would have failed, and the previous low would likely have become resistance. Looking at both outcomes in advance is what keeps footprint reading honest.

Common mistakes when learning order flow

• Reading every candle. Focus on levels.
• Using delta as direction. Delta shows aggression, not who is winning; price response decides that.
• Tiny row sizes. Group prices so each candle is readable.
• Ignoring session timing. The first 30 minutes after 9:15 IST and expiry afternoons behave differently from lunch hours.
• Changing settings constantly. Keep timeframe, row size and imbalance ratio fixed while learning.
• No journal. Screenshots of footprint reads and outcomes teach faster than anything; see trading journal and psychology.

Seeing it on the TradingMarble chart

The TradingMarble chart shows a footprint for NIFTY, BANKNIFTY and other Indian index futures, built from tick-level data, with bid and ask volume per price, delta, candle POC and imbalances. Volume profile, prior levels, VWAP and Smart Money Concepts zones sit on the same chart, so you can study price reaction at each level. For India-specific setup details, see the NIFTY footprint chart guide and the features page.

Footprint chart checklist

1. Am I at a level I planned?
2. What is the candle's volume and delta?
3. Where is the candle POC?
4. Heavy or thin volume at the extremes?
5. Any stacked imbalances?
6. Does cumulative delta agree with price?
7. Did the next candle confirm, and where is the read wrong?

Learning how to read a footprint chart takes screen time, but the idea is simple: bid ask volume shows who was aggressive, delta sums it up, the POC shows where business was done, and levels tell you when it matters. That is order flow trading in its most practical form.

Frequently asked questions