Volume Bars Explained
Volume bars close after a fixed number of contracts trade, so every bar represents similar participation. Here is how they work and when they help futures traders.
Updated 2026-11-05 · 7 min read
I trade ES and NQ with orderflow and share daily ES/NQ levels and setups in SATO VIP, my own paid service. Bar sizes below are illustrative, not recommendations.
A volume bar closes once a set number of contracts has traded, not when the clock moves. During the open or news, bars print quickly; at lunch they slow down. Unlike tick charts, which count trades, volume bars count contracts, so large orders carry their full weight. They are useful for comparing bars of equal participation and for footprint reading, but they hide time context. Don't confuse them with the volume histogram under a normal chart.
Volume bars are one of several chart types that ignore the clock. For the broader decision, read my comparison of tick, range and time charts; this guide covers volume bars only.
Two meanings of 'volume bars'
Volume histogram: the bars under a time chart showing how many contracts traded in each period. Volume chart: price bars that each close after a fixed volume. This guide is about the second, but the histogram is still worth watching on any chart.
How a volume chart is built
You set a size, for example 1,000 contracts. The platform adds up contracts as trades print; once the total reaches 1,000, the bar closes and a new one starts. Each bar still has an open, high, low and close. Because the final trade can overshoot, platforms either split it into the next bar or let the bar run slightly over.
Where volume bars help
- Equal participation. Each bar represents similar contracts, so bars are easier to compare.
- Adapts to activity. Fast markets get more detail; slow markets get less clutter.
- Large orders count fully. A big lot moves the bar further than on a tick chart.
- Cleaner footprints. Equal-volume bars make footprint imbalances easier to compare.
Where volume bars mislead
- No time context. You can't see how long price stayed at a level.
- Session changes distort. Overnight volume is much thinner, so a size that works in the regular session can be too slow overnight.
- Platform differences. Data feeds and overshoot handling vary, so bars may not match across platforms.
- Indicators shift meaning. A 20-bar average covers very different time spans across the day.
Volume bars vs tick charts vs time charts
| Volume bars | Tick charts | Time charts | |
|---|---|---|---|
| New bar when | Set number of contracts trade | Set number of trades print | Clock interval ends |
| Large orders | Count fully | Count as one trade | Count fully |
| Busy markets | More bars | More bars | Same bars, bigger |
| Quiet markets | Few bars | Few bars | Same bars, smaller |
| Time context | No | No | Yes |
| Best for | Equal-participation bars | Activity & orderflow | Session structure |
Tick and volume charts are close relatives; the difference is whether you count trades or contracts. For range-based bars see my range bars guide, and for the full trade-offs see tick vs range vs time charts.
Choosing a size for ES and NQ
Start with a size that prints a manageable number of bars in the regular session—enough to see structure, not so many that each bar is noise. NQ usually trades fewer contracts than ES, so the same number behaves differently on each. Keep one size fixed for several weeks, judge it on forward results, and pair it with levels such as volume profile and orderflow confirmation.
Last updated 2026-11-05. Futures trading involves substantial risk of loss.
Volume Bars FAQ
What are volume bars?+
Volume bars are chart bars that close after a fixed number of contracts trade, for example 1,000 contracts, instead of after a fixed amount of time. Busy markets print many bars; quiet markets print few.
Is 'volume bars' the same as the volume histogram?+
No. The volume histogram is the row of bars under a normal chart showing how much traded each period. A volume chart builds the price bars themselves from volume. Both are often called 'volume bars', so check which one a source means.
Volume bars vs tick charts: what is the difference?+
A tick chart closes a bar after a set number of trades, regardless of size. A volume chart closes after a set number of contracts. One 50-lot counts as one tick but 50 contracts, so volume bars react more to large participants.
What volume bar size should I use for ES or NQ?+
There is no correct number. Traders often pick a size that prints a manageable number of bars per session, then adjust. Test several sizes on your own data and keep one fixed while you evaluate it.
Do volume bars all have the same volume?+
Roughly. The last trade that completes a bar can overshoot the target, so some platforms split it and others let the bar run slightly over.
Are volume bars good for day trading?+
They can help: they speed up during the open and news and slow down at lunch, so each bar represents similar participation. They are less useful for reading time-based context like session hours.
Do volume bars work on TradingView?+
Availability depends on the platform and plan; many futures platforms offer volume-based bars. Check your platform's chart-type settings.
Can I use orderflow on volume bars?+
Yes. Footprint and delta can be shown on volume bars, and equal-volume bars make footprints easier to compare. Many traders still prefer tick or time charts for footprint.
What chart does Sato use?+
I trade ES and NQ with orderflow and volume-based levels, mostly on tick and time charts with ExoCharts for footprint. I don't trade primarily from volume bars.
Should beginners use volume bars?+
Learn time charts first so you understand session structure, then experiment with volume or tick bars to see whether activity-based bars suit you.