> For the complete documentation index, see [llms.txt](https://abcc-docs.gitbook.io/api/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://abcc-docs.gitbook.io/api/websocket-market-streams/diff.-depth-stream.md).

# Diff. Depth Stream

Order book price and quantity depth updates

```
{"event":"pusher:subscribe","data":{"channel":"incr-sandusdt"}}
```

| Parameter | Explain            |
| --------- | ------------------ |
| channel   | incr-${pair\_name} |