What is RELVOL?

RELVOL is a relative volume scanner that allows traders to find unusually active stocks and ETFs and visually compare their intraday trading volume to historical averages.

Relative volume scanner.

What is relative volume?

Relative volume (RVOL) is the ratio of shares traded during a period of time divided by an average of the same security's historical trading volume.

The parameters of the historical volume average can be adjusted to calculate relative volume for a specific timeframe.

RELVOL calculates relative volume indicators in three customizable timeframes:

1. Daily

The current volume divided by the average daily volume of the past 1–20 trading days.

A daily relative volume of greater than 1 means that the security has traded more than its average daily volume.

2. TOD

The current volume divided by the average volume of the past 1–20 trading days at the same time of day.

A time-of-day relative volume of greater than 1 means that the security has traded more shares than usual by that point of time in the session and is on track to exceed its average daily volume.

3. Period

The volume during the past 5 minutes–2 hours divided by the average volume of the past 1–20 trading days during the same time period.

A period relative volume of greater than 1 means that the security traded more shares than it usually does during the same portion of the day.

What does high relative volume indicate?

A high absolute volume implies that a security is actively trading, but it doesn't provide any information about how active it is relative to previous sessions.

High relative volume indicates unusual trading activity and an above average level of attention from the market. This is often in reaction to news regarding the security, or in anticipation of news to be released.

How can relative volume be used to find and analyze trades?

The increased trading activity of a high relative volume stock or ETF is often accompanied by volatile price action.

Relative volume can be used as a metric to screen tickers by to find volatile day swing or day trade opportunities.

The RELVOL scanner quickly surfaces high relative volume tickers and filters them by your criteria to build your watchlist of trade ideas.

Relative volume can also be used to determine the strength of a breakout or confirm the trade signals of other momentum strategies.

A good relative volume ratio for any timeframe is 2 or greater, since it means the ticker has traded at least twice the average amount of shares during that period of time and its traders are likely reacting to a catalyst.

What are the scanner's features?

Using The Scanner


Scanner column definitions.

The trading symbol of the security.

Absolute Volume

The number of shares traded during the current session.


The number of shares traded over the selected period of time.

Relative Volume

The relative volume ratio of the current volume compared to the daily average.

TOD (Time-of-day)

The relative volume ratio of the current volume compared to the daily average at the current time of day. This represents the pace of the volume compared to previous sessions.


The relative volume ratio of the current volume over the selected period compared to the average of the selected day range over the same period of time.


Sortable column headers.

Click any table header to sort results by its corresponding column. Click again to toggle between descending and ascending order.


Data update indicator.

The scanner updates its data once per minute.

When an update becomes available, the refresh indicator will appear at the top of the scanner above the control bar and the submit button will turn blue. Click to refresh the scanner and receive the latest data.


Clicking the second toggle button in the control bar will reveal or hide the panel containing all the settings and filters for the scanner.

RVOL Settings

Relative volume timeframe settings.

These settings provide granular control over the timeframes being compared in the relative volume calculations.


The number of trading days factored into the interday average volume calculation, from 1 (the previous trading session) to 20 (the past 20 trading days/calendar month).


The intraday time range for the absolute and relative volume period columns.

Filter by value

Scanner filters.

Filter results by any column or field by entering a minimum and/or maximum value, or selection, into its respective filter.

The drop-down selectors included with several of the filters allow you to choose the factor to multiply its filters' values by to eliminate the need to type the entire number. Both the minimum and maximum value are multiplied by the selected factor.


For example,

Filter's multiplying factor.

will filter results between 500,000 and 10,500,000.

Filter by ticker

Filter by ticker(s).

To filter results by one or more tickers, type their comma or space-separated symbols into the search input.

Applying filter changes

When a filter has been added, updated, or removed, the submit button icon will become a check mark to indicate that changes have been made. Click to apply the updated filtering criteria and refresh the results.


Scanner results pagination.

Navigate through pages of results by clicking the previous or next pagination link at the bottom of the scanner.


Relative Volume Chart

Relative volume chart.
Chart Lines

The orange line is the security's volume during the current trading session.

The white line is the average volume for the selected number of days.

For both lines, the trailing highlighted background section indicates the range of time for the period calculation.

Interactive History

Moving your cursor across the chart will update the crosshair's position and the RVOL Analysis widget below with the volume values for the selected point in time.

Click the chart to lock the crosshair in its current position.

On touchscreen devices, tap and hold the chart for a moment to unlock the crosshair which can then be dragged across the chart to the desired position. Tap again to reset the crosshair.

Price Chart

Price chart.

The 15-minute delayed price chart for the ticker.

Price chart toggle./Volume chart toggle.

Switch between the two chart types by clicking the chart toggle button.


RVOL Analysis

Relative volume analysis widget.

This widget displays the volume details for each timeframe at the point in time currently selected on the volume chart.

  1. TOD: The time of day that the widget's data corresponds to.
  2. Period: The time range for the Period column's calculation, based on the TOD and your selected Period in the RVOL Settings.
  1. RVOL: The relative volume ratio for each timeframe column.
  2. Volume: The volume of the current trading session for each timeframe.
  3. The average historical volume of each timeframe. Clicking the toggle in the first column will reveal the volume details for each day factored into the historical volume average. Scroll down to see all all days.
Historical relative volume.

Ticker Details

Ticker details widget.
  1. Liquidity: The average daily dollar volume liquidity over the past 20 trading days.
  2. MCAP: The market capitalization of the security.
  3. Type: The type of security, either a stock or an exchange traded fund (ETF).

The full name of the security and its 15-minute delayed price.


Watchlist addition toggle./Watchlist removal toggle.

Add or remove a ticker from your watchlist using the watchlist inclusion toggle button.

Relative volume watchlist view toggle.

Click the first toggle button in the control bar to switch between your watchlist and the scanner.

Historical Data

Analyze and interact with up to one month of historical relative volume data for each ticker.

Historical data toggle.

Access the historical data interface by clicking the toggle button, or by selecting a ticker in the historical volume data directory.

Navigating the history

Historical data navigation.

Select the date of the trading session to view historical data for up to 20 trading days ago.


Same as RVOL Settings. The Average is relative to the selected Date.

One-minute interval historical data

Historical volume data.

The minute-by-minute historical volume data for the selected trading day and settings, including 30 minutes of pre-market data.

The timestamps are automatically converted to your local time zone.


Android App

RELVOL is also available as an application for Android devices.

The mobile app provides the full functionality of the scanner in a convenient package without the need for a web browser.

Google Play

Relative Volume Scanner — Google Play
Get RELVOL on Google Play

Google Play and the Google Play logo are trademarks of Google LLC.

Amazon Appstore

Relative Volume Scanner — Amazon Appstore

Get RELVOL on the Amazon Appstore

Social Media


Reddit icon.Twitter icon.Facebook icon.

Live Streams

Twitch icon.YouTube icon.

Pre-Market Reports

Medium icon.