Glossary · Markets · Beginner-friendly
Volume
In plain English
Volume is how many shares changed hands. A big price move on heavy volume usually means more people agree; the same move on tiny volume is easier to fade.
Everyday analogy: A stadium roar vs a few people whispering - same “score,” different energy.
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Why it matters
Volume is the participation meter. It helps separate conviction moves from quiet drifts that often fade.
A bit more detail (optional)
Price plus participation
A breakout on heavy volume usually means more than the same move on a sleepy tape. Volume does not say who is right - only that activity rose.
Climaxes
Extreme volume spikes can mark panic or euphoria. Wait for follow-through before treating one bar as a permanent turn.
Simple examples
Quiet drift vs loud break
A 3% rise on half average volume is often fragile. The same rise on triple volume after guidance is more likely to matter.
Event volume
Guidance hits after the close. Next session opens on multiples of average volume - the move has more information content than a quiet Tuesday drift.
Easy mistakes to avoid
- Treating every volume spike as a buy signal
- Reading delayed volume as a precise scalping edge
- Ignoring that index ETFs and single names trade differently
Remember: Use volume to judge conviction - not as a standalone crystal ball.