> ## Documentation Index
> Fetch the complete documentation index at: https://docs.0xarchive.io/llms.txt
> Use this file to discover all available pages before exploring further.
# Funding and open interest
> Funding annualised from the hourly rate, and open interest in USD, from 5-minute samples.
Load it on BTC 1h in the terminal, then change its settings or open it in the script editor.
Funding as a yearly rate, as bars, and open interest in USD, as a line in a pane of its own: the two share no scale.
## How it works
`derivatives()` is a sample stream: read in a handler, it gives the last 5-minute sample before the bar closed. `funding` is the rate for one hour, as a fraction, so the yearly percent is that times 24 × 365 × 100. For per-bar open interest with high and low, see [`openInterest()`](/terminal/reference/streams#openinterest).
## The script
```ts funding-oi.ts theme={"theme":"github-dark"}
// Funding, annualised from the hourly rate, and open interest in USD, as of each bar: the last 5-minute sample before it closed.
indicator('Funding and open interest');
const chart = bars();
const perp = derivatives();
const funding = plot.histogram('Funding % a year', { precision: 2 });
// A pane of its own: funding (a few percent) and open interest (billions) share no scale.
const oi = plot.line('Open interest $', { pane: 'oi' });
chart.onBar(() => {
if (!perp.available) return;
funding.set(perp.funding * 24 * 365 * 100, perp.funding >= 0 ? color.up : color.down);
oi.set(perp.openInterestUsd);
});
```
## Next step
See the next example, [Breadth above VWAP](/terminal/examples/breadth-above-vwap).
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