April 16, 2024

Invest Spotter

Where Dollars and Sense Meet

What Are The Bars At The Bottom Of A Stock Graph?

Stata twoway bar graph how to make the bars actually touch the bottom

Understanding the Bars

When you look at a stock graph, you may have noticed the bars at the bottom that seem to represent some sort of information. These bars are known as volume bars, and they provide crucial information about the trading volume of a particular stock during a given time period.

The Importance of Volume

Volume is a key indicator in stock trading as it represents the number of shares being bought and sold. It gives investors and traders an idea of the level of activity and interest in a particular stock. Essentially, volume helps determine the liquidity of a stock and can indicate the strength or weakness of a trend.

How Volume Bars Work

Volume bars are typically displayed as vertical bars at the bottom of a stock graph. The height of each bar represents the volume traded during a specific time period, such as a day, week, or month. The longer the bar, the higher the volume traded during that period.

Interpreting Volume Bars

Volume bars can provide valuable insights into market dynamics and can help traders make more informed decisions. Here are a few ways to interpret volume bars:

Confirmation of a Trend

When the volume bars align with the direction of the price movement, it can confirm the strength of a trend. For example, if a stock is experiencing an uptrend and the volume bars are increasing along with it, it suggests that the trend is being supported by a large number of buyers.

Signs of Reversal

Volume can also indicate a potential reversal in a stock’s price. If there is a sudden spike in volume accompanied by a significant change in price, it could be a sign that the current trend is losing steam. High volume combined with a price decline may suggest that sellers are taking control, potentially leading to a reversal.


Divergence occurs when the price of a stock is moving in one direction, while the volume bars are moving in the opposite direction. This can be a warning sign of a possible trend reversal. For example, if the stock price is rising, but the volume bars are decreasing, it may indicate that the buying pressure is waning, and a reversal could be imminent.

Using Volume Bars in Trading Strategies

Traders often incorporate volume analysis into their trading strategies to gain an edge in the market. Some commonly used volume-based indicators include:

Volume Moving Average

A volume moving average is a smoothed line that represents the average volume over a specified period. It can help identify trends in volume and highlight potential trading opportunities.

On-Balance Volume (OBV)

OBV is an indicator that adds or subtracts volume based on whether the price closes higher or lower than the previous day. It can be used to confirm trends and detect potential reversals.

Volume Profile

Volume profile displays the volume traded at each price level over a specified period. It can help identify support and resistance levels and provide insights into market sentiment.


The bars at the bottom of a stock graph, known as volume bars, provide valuable information about the trading volume of a stock. By interpreting these bars, traders can gain insights into market dynamics and make more informed trading decisions. Incorporating volume analysis into trading strategies can help identify trends, confirm reversals, and detect potential trading opportunities.