> ## Documentation Index
> Fetch the complete documentation index at: https://docs.polynode.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# TypeScript Short-Form and TWAP

> Rotate TypeScript subscriptions across short-form crypto markets with the correct Chainlink TWAP window.

Polymarket's short-form crypto markets change identifiers at fixed boundaries. The managed stream discovers the active market, chooses the correct Chainlink selection, and replaces the subscription when the boundary arrives.

<Warning>
  Starting **August 7, 2026 at 00:00 UTC**, use a 30-second TWAP for 5-minute markets and a 60-second TWAP for 15-minute and 4-hour markets. One-hour markets continue to use the default spot feed.
</Warning>

| Market interval | Chainlink selection |
| --------------- | ------------------- |
| `5m`            | `30` seconds        |
| `15m`           | `60` seconds        |
| `1h`            | default spot feed   |
| `4h`            | `60` seconds        |

## Managed rotation

```typescript theme={null}
import { PolyNode } from 'polynode-sdk';

const apiKey = process.env.POLYNODE_API_KEY;
if (!apiKey) throw new Error('Set POLYNODE_API_KEY');
const pn = new PolyNode({ apiKey });

const stream = pn.ws.shortForm('5m', {
  coins: ['btc', 'eth', 'sol'],
});

stream.on('rotation', (rotation) => {
  console.log({
    windowStart: rotation.windowStart,
    windowEnd: rotation.windowEnd,
    markets: rotation.markets.map((market) => ({
      coin: market.coin,
      slug: market.slug,
      feed: market.chainlinkFeed,
      twapWindowSeconds: market.twapWindowSeconds,
      priceToBeat: market.priceToBeat,
    })),
  });
});

stream.on('settlement', (event) => console.log(event));
stream.on('error', (error) => console.error(error));
```

At every boundary the helper closes its dedicated socket, opens a new one, and subscribes to the new market identifiers and price selection. Consumers do not manually calculate the next slug, but they should handle a normal connection transition around rotation.

Supported assets are BTC, ETH, SOL, XRP, DOGE, HYPE, and BNB.

## Explicit Chainlink selection

Use one Chainlink subscription per event socket. Combine feeds and windows in the same subscription when you need several:

```typescript theme={null}
const prices = await pn.ws
  .subscribe('chainlink')
  .feeds(['BTC/USD', 'ETH/USD'])
  .twapWindows([30, 60])
  .send();

console.log({ source: prices.priceSource, windows: prices.twapWindows });
prices.on('price_feed', (event) => {
  console.log(event.feed, event.price, event.is_twap, event.twap_window_seconds);
});
```

Do not create two competing Chainlink selections on one `PolyNodeWS`. Use another client connection if the selections must be isolated.

## Cleanup

```typescript theme={null}
stream.stop();
pn.ws.disconnect();
```

Read the [shared short-form guide](/sdks/short-form) for market fields, manual mode, and orderbook integration.