[discrete]
[[esql-change_point]]
=== `CHANGE_POINT`

[NOTE]
====
The `CHANGE_POINT` command requires a https://www.elastic.co/subscriptions[platinum license].
====

preview::[]

`CHANGE_POINT` detects spikes, dips, and change points in a metric.

**Syntax**

[source,esql]
----
CHANGE_POINT value [ON key] [AS type_name, pvalue_name]
----

*Parameters*

`value`
:   The column with the metric in which you want to detect a change point.

`key`
:   The column with the key to order the values by. If not specified, `@timestamp` is used.

`type_name`
:   The name of the output column with the change point type. If not specified, `type` is used.

`pvalue_name`
:   The name of the output column with the p-value that indicates how extreme the change point is. If not specified, `pvalue` is used.

[NOTE]
====
There must be at least 22 values for change point detection. Fewer than 1,000 is preferred.
====

*Example*

[source.merge.styled,esql]
----
include::{esql-specs}/change_point.csv-spec[tag=changePointForDocs]
----
[%header.monospaced.styled,format=dsv,separator=|]
|===
include::{esql-specs}/change_point.csv-spec[tag=changePointForDocs-result]
|===