Rules

Anomaly Formula: Amount-By-Min

What it does:
This rule compares your most recent usage value with the lowest value in your prior history. If the absolute difference between them meets or exceeds your threshold—and the change direction matches your setting—you’ll receive an alert.

When to use it:
Catch situations where your usage suddenly climbs well above your usual low water mark or plunges far below it—ideal for spotting emerging cost trends or unintended deletions.

Examples

✅ Example 1: Significant Increase Above Minimum

• Change Type: Any
• Threshold: 50
• History: 200, 220, 180, 240
• Explanation:
  • Previous minimum was 180, latest usage is 240.
  • Difference is 240 − 180 = 60, exceeding the threshold.
  • Since change type is “Any,” an alert is triggered.

❌ Example 2: Small Drop Above Minimum (No Alert)

• Change Type: Any
• Threshold: 50
• History: 1000, 841, …, 9, 6
• Explanation:
  • Minimum prior usage was 9, latest is 6.
  • Difference is |6 − 9| = 3, below the threshold.
  • No alert is triggered.

✅ Example 3: Large Drop Below Minimum

• Change Type: Decreased
• Threshold: 100
• History: 500, 450, 400, 290
• Explanation:
  • Minimum prior usage was 400, latest usage is 290.
  • Difference is 290 − 400 = −110, which meets “Decreased” and exceeds the threshold.
  • An alert is triggered.