Twenty-four-hour volume is the total value of an asset traded over the past day. It measures activity — how much buying and selling is actually happening — rather than price, and it is one of the quickest ways to gauge how alive a market is.
Volume and liquidity go hand in hand. High volume usually means many participants, tighter spreads and prices you can trust, because there is enough trading to absorb orders. Thin volume means a single large trade can swing the price and the quoted figure is less reliable.
Volume is also a useful sanity check on price moves. A sharp move on heavy volume reflects broad participation, while a big move on almost no volume can be noise or even manipulation in a small, illiquid market.
Worked example
A coin showing millions in 24-hour volume trades far more reliably than one showing only a few thousand.
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This definition is general education, not investment advice. Markets — especially crypto — are volatile and you can lose money. Please read our disclaimer and see our methodology.