Funding and Open Interest: Read the Context Together
Funding and open interest describe different parts of a market. Read a hypothetical event and build a monitoring routine without treating it as a trade signal.
Holding payments and outstanding contracts
Funding describes a perpetual contract's holding payment. Open interest describes outstanding contracts. Neither measure tells you the next price direction by itself.
Reading them together helps when the data refer to comparable markets. Start with one contract on one venue. A venue-specific funding rate and aggregate OI across all exchanges describe different market scopes; do not silently combine them.
Rising OI means more contracts remain open, each with a long and a short side. Positive funding usually means longs pay shorts. These two facts do not establish that every new participant intends to push price higher.
Align the readings before interpreting them
Suppose price rises 3% in an hour, OI measured in coins rises 5%, and the estimate for the next funding settlement moves from +0.01% to +0.04%. This warrants a closer look at holding costs alongside growing positions. It does not identify all participants as crowded longs.
For a position worth 3,000 USDT, one settlement at +0.04% produces a 1.20 USDT payment. At +0.01% it would be 0.30 USDT. The difference is 0.90 USDT for that settlement, not for every hour.
Dollar-denominated OI can rise because price rose. If underlying position quantity stays constant while price increases 3%, its dollar valuation rises by roughly 3% too. Check units before concluding new positions were added. Hourly trading volume is another measure, not a substitute for OI.
Build three independent observations
Use JustScreener's funding screener for rates, OI screener for position changes and price screener for moves. This workflow does not assume the tools automatically combine those conditions.
- Record the venue, contract, time and OI units for the event.
- Compare price and OI over one window; read funding with its own settlement interval.
- Write down two plausible explanations and the evidence that would distinguish them.
Start with one measure and add the others as your process develops. Register and save settings for an event you can evaluate on a chart.
For the basics, read the OI guide and funding guide.
Related reading: Funding Arbitrage: How Basis Risk Changes the Result.
Track funding without manual checks
The funding screener checks rates across every pair on 9 exchanges and sends a push or Telegram alert when a rate crosses your threshold.
Funding screener
