™Open interest (OI) is the total number (or value) of futures contracts that are currently open — positions that have been opened and not yet closed. Every open contract has a long side and a short side, so open interest measures how much is at stake, not which side is winning.
Open interest vs volume
Volume counts every contract traded in a period, including positions being closed. Open interest only changes when positions are opened or closed overall: it rises when new positions are created and falls when existing ones are closed or liquidated. A day of huge volume can leave open interest unchanged if traders were mostly passing positions to each other.
Reading OI with price
| Price | Open interest | Common reading |
|---|---|---|
| Up | Up | New positions are joining the move — often fresh longs; the move has new money behind it |
| Up | Down | Positions are closing — often shorts covering; the rally may have less fresh conviction |
| Down | Up | New positions are joining the decline — often fresh shorts |
| Down | Down | Positions are closing — often longs exiting or being liquidated |
"Often" matters: open interest cannot tell you which side opened the position. Funding, liquidations and order flow help fill in the picture.
Why sharp OI drops matter
A sudden fall in open interest during a fast move usually means positions were forced out — a liquidation cascade. After a flush like that, the leverage that was driving the move has been removed, which is why sharp moves sometimes stall once open interest has dropped.
Common mistakes
- Treating rising OI as bullish. Rising OI only means more positions; shorts are open interest too.
- Using one exchange as the market. OI is split across many venues; one exchange's figure is a sample.
- Ignoring funding. Rising OI with very high funding points to crowded longs; with negative funding, to crowded shorts. Funding rate explained →
Open interest in LiveTradingAI
Market Verdict combines open interest with funding, liquidations, trend, momentum, order blocks, fair value gaps and coin news into one plain-English market read, and every past read is scored against what price did next — misses included. Free in the browser. Open Market Verdict →