Account Anomaly Detector

Monitors your account for unexpected performance deviations by comparing today's stats against historical averages for the same weekday. Sends an alert email when impressions, clicks, conversions, or cost deviate beyond configurable thresholds.

Shopping

PMax

Display

YouTube

alerts

anomaly

monitoring

Overview

Account Anomaly Detector compares today's account performance, up to the current hour, against the average of the same weekday over the past few weeks. When impressions, clicks, or conversions fall below your thresholds — or cost rises above yours — it logs the anomaly and (if an email is set) sends an alert. Self-contained: no companion spreadsheet needed.

Setup

1Create a new script and paste the code.
2Set the low-traffic thresholds (e.g. IMPRESSIONS_THRESHOLD = 0.5 alerts when impressions are below 50% of the weekday average).
3Set COST_THRESHOLD for overspend (e.g. 2.0 alerts when cost exceeds 200% of the weekday average).
4Set WEEKS to how many past same-weekday weeks form the baseline (default 4).
5To receive email alerts, set EMAIL_ADDRESS; leave blank to log only.

Ready to Use This Script?

Configuration Variables

Variable	Default	Description
`IMPRESSIONS_THRESHOLD`	0.5	Alert when today's impressions fall below this fraction of the same-weekday average. 0 disables.
`CLICKS_THRESHOLD`	0.5	Alert when today's clicks fall below this fraction of the same-weekday average. 0 disables.
`CONVERSIONS_THRESHOLD`	0.5	Alert when today's conversions fall below this fraction of the same-weekday average. 0 disables.
`COST_THRESHOLD`	2.0	Alert when today's cost exceeds this multiple of the same-weekday average. 0 disables.
`WEEKS`	4	Number of past same-weekday weeks to average for the baseline.
`DATA_LAG_HOURS`	3	Hours subtracted from now so partially-reported recent data is ignored.
`EMAIL_ADDRESS`	""	Recipient for email alerts. Leave blank to log only.

Expected Output

=== Account Anomaly Detector (MONDAY, up to 14:00) ===
  Clicks low: 312.0 by 14:00, expected >= 540.0
  Cost high: 1240.50 USD by 14:00, expected <= 980.00
Alert emailed to you@example.com

Notes

Self-contained — no companion spreadsheet required (the original Google template needed one). It compares only the hours of the day that have elapsed against the same hours on the same weekday in prior weeks. Schedule daily rather than hourly to avoid repeat alerts.