What is Open Interest?
Open Interest (OI) is the total of all open positions (longs + shorts, aggregated as contract pairs) that have not yet been closed by an offsetting trade or by expiry.
Important: every open contract is counted once — long and short are two sides of the same contract.
OI vs. volume
| Open Interest | Volume | |
|---|---|---|
| What | Open positions at the end of the day | Contracts traded within a period |
| Tells you | How much capital is committed? | How actively was it traded? |
| When rising | New positions are being opened | High trading activity |
| When falling | Positions are being closed | Low activity |
Volume can rise without OI changing — e.g. when traders buy and sell intraday without holding overnight positions.
Interpretation
OI rising + price rising → Bullish
New capital is flowing into long positions. The trend has real backing.
OI rising + price falling → Bearish
New capital is flowing into short positions. Selling pressure is being reinforced.
OI falling + price rising → Weak signal
Shorts are being covered (short squeeze). No genuine fresh buying — possibly only temporary.
OI falling + price falling → Capitulation
Longs are being force-closed or exiting. Can signal the end of a downtrend.
OI as a sentiment indicator
- Very high OI → lots of positions built up, elevated squeeze risk (liquidations)
- OI spike before a big move → often a sign that market participants expect a direction
- Sudden OI collapse → mass liquidation or orderly retreat
In the Botty market dashboard, OI is shown as a 24h chart to visualize capital inflows and outflows in the BTC perp market.
Reading funding rate & OI together
The combination is especially informative:
| OI | Funding rate | Interpretation |
|---|---|---|
| ↑ | positive (high) | Longs overlevered, squeeze risk ↑ |
| ↑ | negative | Shorts overlevered, short-squeeze risk ↑ |
| ↓ | near 0 | Market is deleveraging, neutral phase |
How Botty uses it
The market dashboard shows OI from Binance Futures (/futures/data/openInterestHist). Botty strategies currently do not use OI directly as an entry signal, but as context information for the daily market assessment.