Direct Answer
Up volume is the volume of bars in which the price closed above the prior close. Whole-bar volume is assigned to the up side based on the bar's price change, with no look at who initiated each trade. Up volume that clearly exceeds down volume over the same window shows that more activity came on advancing bars.
Up Volume: Formula, Meaning, Signals, Examples and How to Use It
How Is Up Volume Calculated?
Up volume is the volume of bars in which the price closed above the prior close. Whole-bar volume is assigned to the up side based on the bar's price change, with no look at who initiated each trade.
Formula: Up Volume = sum of Volume over bars where Close > prior Close
Inputs:
- Bar closes
- Bar volumes
- Look-back window to sum over
Worked example. Three up-closing bars with volumes of 0.80M, 1.10M and 0.65M shares give an up volume of 2,550,000 shares. The inputs are illustrative numbers, not market data.
Reading it. Up volume that clearly exceeds down volume over the same window shows that more activity came on advancing bars. Market-wide versions sum the volume of advancing stocks and feed breadth measures.
Limits. It is a bar-level label: a bar that closes up may have had heavy selling inside it. This is why up volume differs from buy volume, which is based on trade-level aggressor classification.
What is Up Volume?
Up volume is the volume of bars in which the price closed above the prior close. Whole-bar volume is assigned to the up side based on the bar's price change, with no look at who initiated each trade.
How to use Up Volume
Up volume that clearly exceeds down volume over the same window shows that more activity came on advancing bars. Market-wide versions sum the volume of advancing stocks and feed breadth measures. A reading alone is never a buy or sell signal; it needs context from price structure, volume, volatility and the broader market regime.
Strengths
- Labeling the whole bar needs only the close and prior close, so it works with ordinary bar data and no tick feed.
- The bars of one direction sum to a single total, so the share of volume on up bars can be tracked as a simple ratio.
- Reproducible when the formula and data convention are fixed.
Weaknesses and limitations
- A close higher by one tick labels all of a bar's volume as up, so tiny price changes carry the full weight of the bar.
- A bar that gaps up and then declines through the day still counts as an up bar if it closes above the prior close.
- Correlated indicators can create false confidence by repeating the same underlying information.
Editorial and risk note
This page is educational content, not individualized investment advice. It should not imply guaranteed prediction, accuracy or outperformance.
Frequently Asked Questions
Is Up Volume a buy or sell signal?
No. Up volume that clearly exceeds down volume over the same window shows that more activity came on advancing bars. It is a bar-level label: a bar that closes up may have had heavy selling inside it. A trade built on it still needs a trigger, an invalidation rule, a position size and realistic execution assumptions.
What is the best setting for Up Volume?
Up Volume takes these inputs: bar closes; bar volumes; look-back window to sum over. There is no universal best setting for the tunable ones, so test them across instruments, regimes and out-of-sample periods and favor stable parameter regions over one historical winner.
Can Up Volume be used by itself?
It is a bar-level label: a bar that closes up may have had heavy selling inside it. This is why up volume differs from buy volume, which is based on trade-level aggressor classification. For that reason it is read next to measures of direction, participation, valuation, liquidity and risk, not alone.
Does Up Volume work on every timeframe?
The calculation can be run on any bar size, but behavior is not portable: a reading on a five-minute chart describes a very different market window from the same reading on a daily chart. Validate the exact timeframe before relying on it.
Why does Up Volume give false signals?
A close higher by one tick labels all of a bar's volume as up, so tiny price changes carry the full weight of the bar. A bar that gaps up and then declines through the day still counts as an up bar if it closes above the prior close. Lag, noise and regime changes add to this, because market participants react to new information after the reading is calculated.
How should Up Volume be backtested?
Rebuild Up Volume from bar closes using point-in-time data, write the rules before testing, include delisted securities where relevant, model realistic fills and costs, reserve a validation sample and compare with a simpler baseline.