It is one of the few indicators that is not based on price.
It helps to confirm price trends and chart patterns, as it shows how much interest the security is attracting. Changes in volume tend to lead the price movements. A volume indicator over a long period is relevant to the price trends and helps determine when the price is losing momentum.
Volume is one piece of information that is often neglected by many market players, especially beginners. However, learning to interpret volume brings many advantages and could be of tremendous help when it comes to analyzing the markets.
The Significance of High Volume
A sudden increase in trading volume points to an increased probability of the price changing. News events are typical moments when the volume can increase.
If most of the volume takes place at the bid price, then the price will move lower and the increased volume shows that sellers are motivated to get rid of the stock.
If most of the volume has taken place at the ask price, then the stock price will move higher (due to demand and price availability). The increased volume shows buyers believe the stock is moving, and want to purchase the stock.