Amazon Forecast is no longer available to new customers. Existing customers of Amazon Forecast can continue to use the service as normal. [Learn more"](https://aws.amazon.com/blogs/machine-learning/transition-your-amazon-forecast-usage-to-amazon-sagemaker-canvas/)

# PredictorExecution
<a name="API_PredictorExecution"></a>

The algorithm used to perform a backtest and the status of those tests.

## Contents
<a name="API_PredictorExecution_Contents"></a>

 ** AlgorithmArn **   <a name="forecast-Type-PredictorExecution-AlgorithmArn"></a>
The ARN of the algorithm used to test the predictor.  
Type: String  
Length Constraints: Maximum length of 256.  
Pattern: `arn:([a-z\d-]+):forecast:.*:.*:.+`   
Required: No

 ** TestWindows **   <a name="forecast-Type-PredictorExecution-TestWindows"></a>
An array of test windows used to evaluate the algorithm. The `NumberOfBacktestWindows` from the [EvaluationParameters](API_EvaluationParameters.md) object determines the number of windows in the array.  
Type: Array of [TestWindowSummary](API_TestWindowSummary.md) objects  
Required: No

## See Also
<a name="API_PredictorExecution_SeeAlso"></a>

For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/forecast-2018-06-26/PredictorExecution) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/forecast-2018-06-26/PredictorExecution) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/forecast-2018-06-26/PredictorExecution)