# CompareTo

Comparison baseline types for alert rule thresholds.

Determines what the current metric value should be compared against when evaluating alert conditions.

## TIME\_PERIOD

Compare to a historical time period (relative comparison). Useful for detecting changes over time, seasonal patterns, etc. When using TIME\_PERIOD, the compare\_bin\_delta parameter specifies how many time periods back to compare against.

## RAW\_VALUE

Compare to an absolute threshold value (absolute comparison). Useful for hard limits and business rule enforcement. When using RAW\_VALUE, compare\_bin\_delta is ignored.

{% hint style="warning" %}
When using TIME\_PERIOD, the allowed compare\_bin\_delta values depend on bin\_size:
{% endhint %}

### Example

```python
# Compare current hourly drift to same hour yesterday (24 hours ago)
alert_rule = AlertRule(
        compare_to=CompareTo.TIME_PERIOD,
        bin_size=BinSize.HOUR,
        compare_bin_delta=24  # 24 hours ago
    )

    # Compare daily metrics to last week (7 days ago)
    alert_rule = AlertRule(
            compare_to=CompareTo.TIME_PERIOD,
            bin_size=BinSize.DAY,
            compare_bin_delta=7  # 7 days ago
        )

        # Compare current accuracy to absolute minimum (no time comparison)
        alert_rule = AlertRule(
                compare_to=CompareTo.RAW_VALUE,
                threshold=0.85  # Must be above 85%
            )
```

## TIME\_PERIOD *= 'time\_period'*

## RAW\_VALUE *= 'raw\_value'*


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.fiddler.ai/api/fiddler-python-client-sdk/constants/compare-to.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.