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

# InstrumentStatusIncremental

> Market data schema, template 5

<div className="api-banner">
  <span className="api-protocol ws">SBE</span>
  <span className="api-detail">schema 34 · market data</span>
  <span className="api-tag">template 5</span>
</div>

A live change to an instrument's trading status.

**Direction:** Kraken → client

| ID | Field | Type | Encoding | Presence | Description |
| :- | :- | :- | :- | :- | :- |
| 1 | `instrumentId` | [`InstrumentId`](/exchange/api-reference/sbe/market-data-types#instrumentid) | field | required | |
| 2 | `instrumentStatus` | [`InstrumentTradingStatus`](/exchange/api-reference/sbe/market-data-types#instrumenttradingstatus) | field | required | |
| 3 | `instrumentStatusSeq` | `uint64` | field | required | Contiguous per-instrument status sequence, starting at one |
| 4 | `reason` | [`StatusReasonEncoding`](/exchange/api-reference/sbe/market-data-types#statusreasonencoding) | var data | required | Human-readable reason for this status update, empty when no reason was supplied |

Every message is preceded by the standard SBE `messageHeader` (`blockLength`, `templateId`, `schemaId`, `version`). See [encodings](/exchange/api-reference/sbe/market-data-types#messageheader).