What Is Volume?
Volume is how much of an asset changed hands over a period, usually measured in dollars per day. It is the market's participation gauge: price says what happened, volume says how many people meant it.
How It Actually Works
Every trade adds its size to the tally. High volume around a price move means broad participation and makes the move harder to reverse. Thin volume means few participants, and prices on thin volume drift and gap easily because small orders meet little resistance in the book. Analysts flag it for a reason: a market pinned in a range on its lowest spot volume in years is a market where nobody is committing, and where any determined actor can shove price around cheaply.
Reading Volume Honestly
- Breakouts on high volume carry weight. Breakouts on thin volume are suspicious by default.
- Rising price on falling volume is a rally running out of participants.
- Volume spikes at capitulation lows mark the moment sellers finally exhaust. Easy to see afterward, hard to trade in the moment.
Risks and Common Mistakes
- Trusting reported volume blindly. Wash trading inflates numbers on loosely policed venues and on token screeners, where volume can be manufactured to attract attention. Cross-check with liquidity depth: real markets have both.
- Confusing volume with open interest. Volume is flow during the period. OI is leveraged positions still standing.
- Ignoring venue mix. Derivatives volume dwarfs spot in crypto. A spot-led move and a perp-led move are different animals.
When It Matters
Confirming any technical signal, judging whether a small token's market is real, and understanding regimes: the difference between a conviction market and a drift market is volume. Worked example on my learn page about Bitcoin's thin-volume standoff.
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