Definition
#Tracks the net percentage change in perpetual open interest over six absolute time windows: 1m, 5m, 15m, 60m, 120m, and 240m. The shorter windows catch real-time position flow as it develops. The longer ones tell you whether you're watching a brief spike or a four-hour capital build. BINANCE_PERPS and HYPERLIQUID only. Open interest does not exist on spot markets.
Formula & calculation
#OI Change % = ((OI_now - OI_N_minutes_ago) / OI_N_minutes_ago) × 100OI_N_minutes_ago is the open interest at the close of the 1-minute bar N minutes back. Open interest is polled about every 10 seconds on Hyperliquid, and on Binance every perpetual is polled in turn within the exchange rate limit, so each contract refreshes roughly every 10 to 15 seconds.
Units & range
%. Positive = OI expanding (new positions being opened). Negative = OI contracting (positions closing or being liquidated). Quiet conditions: ±0.5% on 5m. Active sessions: ±3–5%+ on 240m.
Interpretation
#OI is directionally neutral on its own. Every new contract creates one long and one short simultaneously, so rising OI just means more positions exist, not which side is winning. Direction comes from pairing it with price or taker flow.
OI up + price up → new longs entering. Conviction building.
OI up + price down → new shorts entering. Sellers adding exposure.
OI down + price up → shorts being squeezed or closed. Thinner book going up.
OI down + price down → longs liquidating or cutting losses.
The 120m and 240m windows answer a different question: is this a single flush or a sustained directional commitment? A 240m OI build that lines up with taker imbalance describes a more sustained commitment than a single short-window spike.
OI up + price up → new longs entering. Conviction building.
OI up + price down → new shorts entering. Sellers adding exposure.
OI down + price up → shorts being squeezed or closed. Thinner book going up.
OI down + price down → longs liquidating or cutting losses.
The 120m and 240m windows answer a different question: is this a single flush or a sustained directional commitment? A 240m OI build that lines up with taker imbalance describes a more sustained commitment than a single short-window spike.
Practical usage
#Short windows (5m, 15m) surface emerging flows. Use them for real-time momentum signals, paired with Net Taker Imbalance for direction. Long windows (120m, 240m) give structural context: a 240m OI expansion of 5%+ tells you capital has been moving in one direction for four hours. That changes how you read a current 5m spike. To avoid noise on thin contracts, pair it with a Today Volume in $ floor and Liquidity score. The Open Interest filter counts coins, not dollars, so one Open Interest floor can't cover every contract.
Common mistakes
#Frequent interpretation traps and misuse patterns to avoid when applying this metric.
- Reading rising OI as a directional signal. It is not. Always check price direction or taker flow alongside it.
- Applying the same threshold across all windows. A 1% move over 5m is notable; over 240m it is background noise.
- Using on BINANCE spot or COINBASE symbols. Open interest only exists on perpetual contracts (BINANCE_PERPS and HYPERLIQUID).
- Chasing large percentage moves on contracts with very little open interest, where a few trades can swing OI by 10%. Screen them out with Today Volume in $, since the Open Interest filter counts coins, not dollars.