Cumulative Volume Index

The Cumulative Volume Index is an indicator designed to identify the presence of buying and selling pressure, spot shifts in market trends and momentum, give you valuable insights into market dynamics, and help you enhance your trading results and gain confidence in your signals

8 minutes


One tool commonly used by traders and analysts to gauge market momentum is the Cumulative Volume Index (CVI). Developed by Donald L. Cassidy, a renowned technical analyst, in the 1960s, this tool tracks the cumulative volume over time.

To calculate the CVI, you need to add the volume of the market on days when the price increases and subtract the volume on days when the price decreases. This cumulative volume is then combined with a base value, typically the volume on the first day of the analyzed period.

The resulting CVI line helps identify volume trends in the market and confirms or challenges price trends. When both the CVI and the asset market are on an upward trend, it indicates strong buying pressure and a bullish market. Conversely, a downward trend in the CVI and the asset market suggests weak buying pressure and a bearish market.

Traders and analysts rely on the CVI in conjunction with other technical indicators to make informed decisions about buying and selling securities in the market.

Computing the Cumulative Volume Index Indicator

The Cumulative Volume Index (CVI) is a useful tool in determining market momentum and understanding the direction of money flow in the stock market. It takes into account both advancing and declining stocks by calculating the difference between their respective volumes. This value is then added to a running total to derive the CVI for a given period.

CVI = Yesterdays CVI + (Advancing Volume - Declining Volume)

To calculate CVI: Take yesterday’s CVI and add the difference between the volume of advancing stocks and the volume of declining stocks.

While the numerical value of the CVI may not hold significant meaning as it always begins at zero, what truly matters is observing the slope and pattern of the CVI. By analyzing these aspects, you can gain valuable insights into the market’s behavior and make informed decisions.

Understanding the Cumulative Volume Index Indicator in technical analysis

When it comes to analyzing markets, understanding their momentum and trends is of utmost importance. That’s where the Cumulative Volume Index (CVI) comes into play as a valuable tool.

To grasp the concept of CVI, it’s crucial to analyze the direction and slope of the CVI line and how it corresponds to the security’s price. Let’s explore some possible interpretations of the CVI:

  1. If the CVI is rising alongside the price, it suggests strong buying pressure, indicating a potential continuation of the bullish trend.
  2. Conversely, if the CVI is falling while the price is rising, it points to weak buying pressure, implying that the bullish trend may be losing steam.
  3. If both the CVI and the price are falling, it indicates robust selling pressure, hinting that the bearish trend may persist.
  4. On the other hand, if the CVI is rising while the price is falling, it signifies weak selling pressure, indicating that the bearish trend may be losing momentum.

Traders and analysts can complement the CVI with other technical indicators like moving averages or relative strength indicators to confirm or challenge the trends identified by the CVI.

In summary, the CVI proves to be a valuable tool for identifying trends and momentum in market volume. It equips traders and analysts with essential insights to make well-informed decisions about when to buy or sell.

Donald Cassidy’s suggestions on how to use the Cumulative Volume Index Indicator

As the creator of the Cumulative Volume Index (CVI), Donald Cassidy emphasized the value of paying attention to trends and divergences in the CVI line for traders. According to Cassidy’s recommendations, traders should focus on the direction and slope of the CVI line and how it relates to the price of the security. By doing so, they can gain valuable insights.

For instance, when the CVI rises along with the price, it suggests strong buying pressure, indicating a potential continuation of a bullish trend. Conversely, when the CVI falls alongside the price, it indicates strong selling pressure, suggesting a potential continuation of a bearish trend.

Furthermore, Cassidy believed that divergences between the CVI line and the market could serve as indicators of possible reversals or shifts in market sentiment. For example, if the market is on the rise while the CVI line is declining, it may signal a bearish divergence. This divergence implies that buying pressure is diminishing, hinting at an imminent reversal in trend.

In summary, Cassidy regarded the CVI as a potent tool for traders and analysts. Its ability to identify trends and momentum in the market’s volume allows for informed trading decisions based on valuable insights. So, by incorporating the CVI into their analysis, traders can make better-informed choices regarding their trades.

How to use the Cumulative Volume Index in trading?

Cumulative Volume Index plotted along with NIFTY500 and NIFTYTOTAL indices via a multi-symbol workspace, but compared alongside NIFTY500

Discover how you can effectively and practically utilize the Cumulative Volume Index (CVI) with these helpful recommendations for trading:

Spotting trendlines and chart patterns

You can identify trends and chart patterns by using the CVI, which will assist you in anticipating future price movements. For example, if you observe the CVI steadily rising alongside an upward price movement, it may indicate a strong bullish trend.

Identifying divergences between the CVI and the market

Pay attention to divergences between the CVI and price, as they can potentially indicate trend reversals or shifts in market sentiment. Suppose the price of a security is increasing while the CVI is decreasing. In that case, it could be a bearish divergence suggesting that buying pressure is diminishing.

Confirming or contradicting other technical indicators

The CVI can work in harmony with other technical indicators like moving averages or relative strength indicators. It helps to confirm or contradict prevailing trends. If other indicators indicate a bullish trend, a rising CVI can serve as confirmation.

Applying the CVI to multiple timeframes

For a comprehensive understanding of market trends and momentum, apply the CVI to different timeframes. This approach allows you to identify entry and exit points effectively.

Considering the overall market context

While the CVI is a valuable tool, it’s crucial to keep an eye on broader market trends and various factors that can impact the performance of individual securities. Economic indicators, news events, and political developments are examples of such factors.

Combining the CVI with other technical indicators

Enhance your analysis of market trends and momentum by incorporating the CVI alongside other indicators. This comprehensive approach ensures a thorough assessment.

Implementing stop-loss orders

To mitigate potential losses, utilize stop-loss orders based on technical indicators like the CVI, as well as factors like support and resistance levels.

Also see: Stop Loss . . . and its importance in tradingSome ways of setting up stop loss levels

In conclusion, traders can make well-informed trading decisions by effectively utilizing the CVI in conjunction with other technical indicators, trendlines, chart patterns, divergences, market context, and stop-loss orders.

Advantages & Limitations of the Cumulative Volume Index Indicator

Let’s explore the advantages and drawbacks of utilizing the Cumulative Volume Index (CVI) in trading:


  • You gain market insights: By employing the CVI, a volume-based indicator, you acquire valuable insights into market trends and momentum. This enables you to make well-informed trading decisions.
  • It’s user-friendly: The CVI stands out as a straightforward indicator that is both easy to interpret and calculate. You can combine it with other indicators to obtain a comprehensive understanding of a security’s performance.
  • It works in various markets: The CVI proves its versatility by functioning effectively in any market, whether it involves stocks or commodities.


  • Dependence on historical data: Since the CVI relies on historical volume data, it might not accurately reflect present market conditions. To validate the CVI’s signals, it is crucial for you to cross-reference them with other indicators.
  • Risk of false signals: Like many technical indicators, the CVI can occasionally generate false signals, especially during volatile or erratic market phases. For this reason, it is advisable for you to corroborate the CVI’s signals with additional indicators.
  • Necessitates careful interpretation: While the CVI is a potent tool, it necessitates careful interpretation to be utilized effectively. You should be mindful of the CVI’s limitations and corroborate its signals with other indicators. Moreover, it is important to consider broader market conditions when interpreting the CVI’s signals.

You’ll find the CVI to be a powerful indicator based on volume, providing valuable insights into market trends and momentum. It’s user-friendly and can be used together with other technical indicators to validate signals and gain a complete understanding of how well a security is performing. The great thing about the CVI is its versatility, as it can be applied to different timeframes and any market, making it a valuable tool for traders like you.

While the CVI can provide valuable insights into market trends and momentum, it should not be used as the sole basis for making trading decisions. Trading involves inherent risks, and relying solely on the CVI may not capture all relevant market dynamics. It is advisable to combine the CVI with other technical indicators, fundamental analysis, and prudent risk management strategies. Always conduct thorough research, seek professional advice, and consider your individual financial goals and risk tolerance before making any investment or trading decisions.

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