Volume refers to the number of shares that have been bought and sold for the day. This is similar to the beta, but the volume gives us an exact number of just how much volatility a stock might potentially have. The difference between volume and volatility is that a stock might have heavy volume but low volatility, or vice versa. Higher Relative Volume can bring volatility to a stock and make it easier to move. What is Relative Volume and Why Does It Matter? The relative volume compares current volume to the “normal” volume and displays it as a multiple.