Open Interest

Glossary · Derivatives

Open interest is the total number of outstanding derivatives contracts that haven't been closed or settled. Every contract has one long and one short, so OI measures money committed to a market, not volume traded. Rising OI means new positions entering; falling OI means positions closing out — the fuel gauge behind any move.

"OI is how much money is actually sitting in the trade — volume is people talking, OI is people staying."

OI counts open contracts or their notional value — one long matched with one short. Read it against price: price up + OI up means new longs pressing; price up + OI down means shorts covering, which runs out of fuel fast; price down + OI up is fresh shorts building; price down + OI down is longs bailing. The distinction matters: a rally on falling OI is positions leaving the table, not conviction arriving.

The number that matters most is OI relative to its own recent range. When OI on a coin balloons 30–50% in a few days while price grinds sideways, leverage is stacking on one side and the flush usually arrives before the breakout does. After a big wipeout, crushed OI is actually the cleaner setup — fewer forced sellers left in the building. Retail misreads OI as demand; it's exposure, and exposure is exactly what liquidation cascades feed on.

Open interest by coin across seven exchanges, live

Related jargon

Questions

What is Open Interest in crypto trading?

Open interest is the total number of outstanding derivatives contracts that haven't been closed or settled. Every contract has one long and one short, so OI measures money committed to a market, not volume traded. Rising OI means new positions entering; falling OI means positions closing out — the fuel gauge behind any move.

How would a trader say it?

OI is how much money is actually sitting in the trade — volume is people talking, OI is people staying.

Part of the Crypto Jargon glossary — every term, decoded the way a trader would say it.

Crypto Jargon

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