What Is Open Interest in Crypto Trading?

Open interest in crypto trading is the number of futures contracts that are currently open and not yet closed. Every contract has someone betting the price goes up and someone betting it goes down, so open interest counts live agreements, not trades. When exchanges such as Binance, Bybit or the CME report bitcoin open interest, they are telling you how much money is sitting in unsettled bets right now.

How is it different from volume?

Volume is how many people walked through the door today. Open interest is how many are still inside. If you buy a contract and sell it an hour later, you added volume twice and left open interest exactly where it was. Open interest only moves when a position is genuinely created or genuinely closed.

That gives the two numbers different jobs. Volume tells you how busy the market was. Open interest tells you how much exposure is still on the table when the day ends, which is why it is watched closely after a sharp move: busy but emptying is a very different market from busy and filling up.

Where do you see it, and for what?

Every large derivatives exchange publishes it, and tracking sites aggregate it across venues so you can see total bitcoin or ether open interest in one chart. It is usually quoted in dollars, sometimes in coins - worth checking, because a figure in dollars can rise purely because the price rose, with no new positions at all.

Traders use it as a crowding gauge. A large and fast-growing figure means a lot of leveraged positions stacked in one direction, and leveraged positions are the ones that get force-closed when the price turns. That is why violent moves so often arrive when open interest has just hit a high: the market is full of people who cannot afford to be wrong for long.

Open interest never tells you direction on its own. Read it next to price, and treat an unusually high reading as a warning that moves may be sharper than usual, not as a signal to buy or sell. Next, how to read open interest on a futures chart, then what rising and falling readings signal.