How to practice reading order flow charts: a replay and journal routine for footprint observation

The most structured way to practice reading order flow charts is to replay historical sessions bar by bar, pause at fixed checkpoints, and write down what the footprint shows before you see what price does next. Each exercise targets one observation skill, such as delta, imbalances or volume at a level. Each session ends in a journal entry that you review weekly. This routine builds a habit of describing what the chart shows. It does not promise better returns, and nothing here is a trading signal.

What this practice routine is, and what it is not

Order flow charts show a lot of numbers at once. A footprint bar on ES can carry dozens of bid and ask cells, a delta value and imbalance highlights. Beginners often jump straight to interpretation ("buyers are trapped") before they can reliably describe what is printed.

This routine separates the two steps:

1. Observation: what is on the chart, in neutral terms.
2. Interpretation: a hypothesis about what it might mean, written down and checked later against what actually printed.

Replay is useful because you can stop time. It is not the same as live trading. You know the session already happened, there is no execution pressure, and you can rewind. Treat it as a reading exercise, not as evidence that a pattern works.

If you are not yet comfortable with the cell layout, start with the guide on how to read a footprint chart and come back once bid, ask and delta columns feel familiar.

Prepare the replay environment in Sierra Chart

Replay is only as good as the stored data. A footprint built from aggregated history will show cells that never existed in the real tape.

• Tick data: footprints in Sierra Chart are built with the Numbers Bars study, which needs tick by tick data. Check Global Settings >> Data/Trade Service Settings and confirm Intraday Data Storage Time Unit is set to 1 tick. The tick by tick data configuration documentation explains the setting and what happens to data stored before you changed it.
• Verify history: before practicing on a past session, scroll through it and confirm the cells contain bid and ask volume, not empty rows. The article on Sierra Chart footprint tick data requirements covers how to check historical cells.
• Footprint study: add Numbers Bars to the chart and keep the display simple at first: bid x ask volume, bar delta, and one imbalance setting. The Numbers Bars documentation lists what each display option does.
• A separate practice chartbook: save a copy of your workspace under a new name so replay settings never touch your live layout. Chartbooks use the .Cht extension; see the Sierra Chart chartbooks documentation.

Building a clean footprint layout from scratch takes time. A ready-made Sierra Chart footprint chartbook gives you Numbers Bars with bid ask volume, delta and imbalances already configured, so you can spend your practice time reading rather than adjusting settings.

For replay itself, Sierra Chart has a chart replay feature that steps through stored data at a speed you choose and can be paused. The exact menu location and control layout can vary by version, so check the Chart menu in your installation and confirm that the footprint rebuilds cell by cell as replay advances.

Choose sessions and a fixed observation window

Random practice produces random notes. Fix three things before you start:

• Instrument: one at a time. ES is a good default because its 0.25 tick size keeps footprint rows readable. NQ also uses 0.25 but moves through more ticks per bar, so cells change faster. CL uses a 0.01 tick, which makes rows thin unless you group ticks.
• Window: the same clock window every session, for example the first 60 minutes after the US cash open for ES and NQ, or the first hour after the CL pit-era open time you trade. Same window means comparable notes.
• Bar type: keep it constant across a block of sessions. Changing from 1-minute to 500-volume bars mid-week changes what a "normal" bar looks like.

A note on EURUSD: spot forex has no centralized exchange volume, so a spot EURUSD footprint reflects one feed, not the whole market. If you want to practice forex order flow, the CME Euro FX futures contract is the more consistent dataset to replay.

Chart replay exercises

Run one exercise per session. Each takes 30 to 60 minutes including notes.

Exercise 1: describe five bars without interpreting

Pause replay at five fixed checkpoints (for example every 12 bars). For each paused bar, write three lines: where the highest volume cell sits in the bar, whether bar delta is positive or negative and roughly how large compared to the previous bars, and whether any imbalances printed. No words like "strong" or "trapped". Only what is printed.

Exercise 2: delta versus bar direction

Mark every bar where the close direction and the bar delta disagree, for example a down-close bar with positive delta. Count them, note where they occurred relative to the session high and low, and write one hypothesis per occurrence. After the session, check what printed in the following bars. If per-bar and running delta confuse you, review cumulative delta vs bar delta first, since session resets change what you see.

Exercise 3: activity at a level

Pick one price level before pressing play, such as the prior session high or an overnight high. Each time price returns to it, pause and record the volume traded at that row, which side dominated, and how many bars price spent there. You are training attention on a level, not predicting a break.

Exercise 4: predict, then compare

At each checkpoint, write a one-line expectation for the next five bars and why, based only on the footprint. Advance replay and record what happened. The goal is to see where your reasoning was vague, not to score accuracy.

Footprint observation: a neutral vocabulary

Consistent words make your journal searchable later. A short glossary helps:

• High-volume row: the cell with the most combined volume in a bar.
• Delta sign and size: positive or negative, small, medium or large relative to the last 10 bars.
• Imbalance: a cell flagged by your imbalance setting; record the ratio you configured so notes stay comparable.
• Stacked imbalances: three or more consecutive flagged rows on the same side.
• Thin row: a price with very little volume relative to its neighbors.

Write the definition once in your journal and do not change it without noting the date.

Keep a trading journal for observations, not outcomes

A trading journal used for practice records reading, not profit and loss. A simple template per session:

• Date, instrument, contract month, bar type, window
• Exercise number
• Checkpoint notes (observation lines)
• Hypotheses written before advancing
• What actually printed afterward
• One unclear moment: a bar you could not describe confidently
• Settings in use (imbalance ratio, tick grouping)

A spreadsheet works fine. Add a screenshot of each checkpoint so you can revisit the exact footprint later without replaying the whole session.

Review your notes weekly

Once a week, read every entry from that block of sessions and look for patterns in your reading, not in the market:

• Which exercise produced the most "unclear moment" entries?
• Did your vocabulary drift, for example calling something stacked when it was two rows?
• Were hypotheses specific enough to be checked, or vague?

Then pick the weakest exercise for next week. After a few weeks on ES, repeat the block on NQ or CL and note what changes with tick size and speed.

Conclusion

Practicing order flow reading works best as a repeatable routine: verified tick data, a dedicated replay chartbook, one exercise per session, neutral descriptions before interpretations, and a journal reviewed weekly. It trains how carefully you read a footprint. It does not tell you what to trade or guarantee any outcome.

FAQ

How many sessions should I replay per week?

There is no required number. Three to five focused sessions with complete notes are easier to review than ten rushed ones.

Should I practice at full speed or slow replay?

Start slow with frequent pauses so you can write observations. Increase speed only once describing a bar takes you a few seconds.

Can I practice on a day I already traded live?

Yes, but you will remember the outcome, which biases hypotheses. Older sessions you do not remember are cleaner for Exercise 4.

Do I need depth of market data for these exercises?

No. Footprint replay uses tick by tick trade data. DOM and heatmap views need market depth data enabled in the data feed, which is a separate requirement.

If you want a configured footprint workspace for your replay sessions, SierraOnShop offers ready-to-use Sierra Chart chartbooks.