Relative volume, often shortened to RVOL, compares how much a stock is trading now with how much it normally trades. A reading of 1.0 means a normal day. A reading of 2.0 means twice the usual volume. Raw volume numbers mean little on their own, because a quiet day for a giant company can be a frantic day for a small one. Relative volume puts every stock on the same scale.
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Why it matters for swing traders
Price shows where a stock went. Volume shows how many people agreed. A breakout on heavy relative volume suggests real demand. A breakout on thin volume can mean few buyers are involved, and those moves fade more easily.
How to read it
- Breakouts: relative volume clearly above 1.5 on the breakout day adds confidence.
- Pullbacks and bases: relative volume below 1.0 is often a good sign; sellers are not in a hurry.
- Extreme spikes: very high readings on news can mean a move is already crowded. Check where your stop would be before chasing.
A worked example (hypothetical numbers)
A hypothetical stock normally trades 1 million shares a day. It has been basing for four weeks on about 700,000 shares a day (RVOL around 0.7). On the breakout day it trades 2.1 million shares (RVOL 2.1) and closes near the high. Quiet base, loud breakout: that is the pattern traders look for.
Keep it simple
- Compare against the stock's own average, usually the last 50 days.
- Early in the session, use time-adjusted RVOL if your platform offers it.
- Volume confirms a setup; it does not create one.
For more on finding strong stocks, read our note on why market leaders keep leading.
Education only, not financial advice.
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