CompareTo - Fiddler Documentation

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

When using TIME_PERIOD, the allowed compare_bin_delta values depend on bin_size:

Example

# 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"`

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` = `"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.