Volume shows how much trading backs a price move, helping commodity traders judge trend strength, spot breakouts, and avoid false signals when planning entries and exits.
Volume is an important technical analysis tool to learn and understand how to apply to price movements. This quick illustrated introduction will help you understand the concept of volume as it is used by traders to analyze markets.
Volume increases every time a buyer and seller transact their stock or futures contract. If a buyer buys one share of stock from a seller, then that one share is added to the total volume of that particular stock.
Volume has two major premises:
- When prices rise or fall, an increase in volume acts as confirmation that the rise or fall in price is real and that the price movement had strength.
- When prices rise or fall and there is a decrease in volume, then this might be interpreted as being a weak price move, because the price move had very little strength and interest from traders.
The chart below of Gold futures shows a strong trend being confirmed by a strong increase in volume:
The chart above of Gold shows that when prices began making new highs, volume increased. As the price of Gold increased, more and more buyers (buying pressure) appeared to jump on board the trend.
Likewise, if prices are heading downward and are making new lows and volume increases, the sellers are becoming more and more interested as price falls (increased selling pressure).
Importance of Volume when Analyzing Price Movements
The following is an extreme illustration of the importance of volume:
- A buyer places a market buy order after hours for 10 shares of stock. The transaction occurs one dollar above the closing price. Therefore, the one dollar price move had 10 shares worth of interest from a buyer.
- A buyer places a buy order for 100,000 shares of stock. This transaction takes place at a price that is one dollar above the current price.
Which example is more bullish? They both increase the last transaction price by one dollar. If a trader didn’t use volume, he/she would think that the move was identical from a price chart perspective.
Of course, the second example is more bullish because the one dollar more the buyer of the 100,000 shares is willing to pay is significant (the buyer is bullish and is taking a large bet to prove it); whereas, in the second example, 10 shares is insignificant.
Increases or decreases in price along with increased volume isn’t always confirming of trend. Volume blow-offs are discussed on the next page.
Volume Spikes & Blowoffs
Extreme increases in volume along with extreme rises or falls in price can sometimes be interpreted opposite to regular volume analysis:
- Sharp increases in price and sharp increases in volume can mean bulls have been exhausted, all buyers have bought and there is no one else but sellers; the result is bearish.
- Sharp decreases in price and sharp increases in volume can mean that everyone that wanted to get out of the stock or future has; therefore, there are only buyers left – bullish sign.
The chart below of eBay (EBAY) stock illustrates a volume spike, defined as at least two times the average volume:
Volume extremes may occur at bottoms as well, which is shown below in the chart of the Nasdaq 100 QQQQ’s:
A strong understanding of volume is a good addition to price analysis skills. Being able to see when price increases or decreases have firm support or knowing when either buyers or sellers have been exhausted might prove useful when trading.
Another way of visualizing volume is Volume Rate of Change (see: Volume Rate of Change) and the Volume Oscillator (see: Volume Oscillator). Also see Volume Accumulation.
How to Get Started Trading
Further Reading on Volume Indicators
These volume tools complement Volume Analysis: Accumulation Distribution, Chaikin Oscillator, and On Balance Volume (OBV).
Technical analysis is most widely used in CFD and forex trading. If you’re ready to apply these techniques, browse our vetted CFD brokers or forex brokers.
Update history
This page was revised 7 times between May 2020 and April 2026.
Added two paragraphs directing readers to CFD and forex broker resources in Further Reading section.
Added new section on complementary volume tools (Accumulation Distribution, Chaikin Oscillator, OBV) and renamed "Further Reading" to "Further Reading on Volume Indicators" for specificity.
Expanded introduction to clarify that the guide provides an illustrated walkthrough of volume analysis concepts for traders.
Expanded introduction to clarify volume's role in market analysis for traders.
Renamed section heading from "How to Get Started Trading Commodities" to "How to Get Started Trading" and simplified broker introduction text.
Added three new section headings and introductory text to organize content on volume analysis, removed disclaimer, and consolidated list items for better formatting flow.
Restructured volume content by moving introductory premise earlier, consolidating the "Volume Spikes & Blowoffs" section into flowing narrative, and redistributing examples throughout for improved pedagogical progression.
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