This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::CloudWatch::Alarm EvaluationCriteria
<a name="aws-properties-cloudwatch-alarm-evaluationcriteria"></a>

The evaluation criteria for an alarm. This is a union type that currently supports `PromQLCriteria`.

## Syntax
<a name="aws-properties-cloudwatch-alarm-evaluationcriteria-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-cloudwatch-alarm-evaluationcriteria-syntax.json"></a>

```
{
  "[PromQLCriteria](#cfn-cloudwatch-alarm-evaluationcriteria-promqlcriteria)" : AlarmPromQLCriteria
}
```

### YAML
<a name="aws-properties-cloudwatch-alarm-evaluationcriteria-syntax.yaml"></a>

```
  [PromQLCriteria](#cfn-cloudwatch-alarm-evaluationcriteria-promqlcriteria): 
    AlarmPromQLCriteria
```

## Properties
<a name="aws-properties-cloudwatch-alarm-evaluationcriteria-properties"></a>

`PromQLCriteria`  <a name="cfn-cloudwatch-alarm-evaluationcriteria-promqlcriteria"></a>
The PromQL criteria for the alarm evaluation.  
*Required*: No  
*Type*: [AlarmPromQLCriteria](aws-properties-cloudwatch-alarm-alarmpromqlcriteria.md)  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)