Open interest (OI) is the total number of derivative contracts currently held open — every long is matched by a short, and OI counts the pairs. It answers a different question than volume. Volume says how much traded; open interest says how much conviction is still on the table. Volume can spin in circles all day while OI goes nowhere; when OI moves, positioning actually changed.
The live panel aggregates BTC perpetual open interest from four venues — Binance, Bybit, OKX, and Hyperliquid — showing the total, the per-venue split, and a 24-hour history line.
OI is not volume
- A trade between a new buyer and a new seller opens a contract — OI rises.
- A trade where both sides close existing positions — OI falls.
- A trade where a position passes from one holder to another — OI unchanged, volume still printed.
- So rising OI = net new positioning entering; falling OI = net positioning leaving. Volume alone can't tell you which.
The four quadrants — OI change × price change
The classic way to read OI is against price, over the same window. Each combination has a textbook interpretation of what positioning did — note that all four describe the past 24 hours, not the next 24:
- OI up + price up — fresh longs entered on the way up. New money drove the move rather than shorts bailing out.
- OI up + price down — fresh shorts entered on the way down. New bearish positioning, not just longs exiting.
- OI down + price up — short covering. Existing shorts closed and their buy-backs lifted price; demand wasn't necessarily new.
- OI down + price down — deleveraging. Existing longs closed out; the selling was exits, not fresh bearish bets.
- Either measure flat — no read. The quadrants only mean something when both legs actually moved.
Why we count in BTC, not dollars
Dollar-denominated OI moves whenever price moves, even if not a single position changed — a 5% price rise inflates "OI in USD" by 5% all by itself. Counting open interest in BTC isolates real positioning changes from price noise. The panel shows dollar values for scale, but every change percentage and the history line are BTC-denominated so a price move can't fake a positioning story.
Caveats — read these before leaning on the panel
- Coverage is four venues (USDT-linear perps), not the whole market — treat levels as a consistent sample, and changes as more meaningful than absolutes.
- 24h change is computed from the venues that publish history (Binance, Bybit); OKX and Hyperliquid contribute current levels only.
- OI says positioning changed — it never says who is right. Crowded positioning can unwind violently in either direction.
- Strongest when read in confluence with the taker-flow dashboard: e.g. rising OI while spot and perp takers lean the same way is a much fuller picture than either alone.
- As everywhere on this site: descriptive market data for learning, not trading advice.