Change Detection & Volatility Alerts
Detect sudden performance changes and content modifications.
Part of Competitor price monitoring — the full answer, the facts and the alternatives in one place.
Quick answer
How to get alerted when a webpage changes?
Lemwatch takes a full-page screenshot on your schedule, compares each new capture to the last with pixel and text diffs, and alerts you when a real change appears.
Change Detection & Volatility Alerts#
What It Detects#
LemWatch automatically identifies two types of changes:
Sudden Changes (±15 point swings)
When any metric changes by more than 15 points between checks, LemWatch flags it as a "Sudden Change". This often indicates:
Performance Volatility (range > 25 points)
When a metric fluctuates by more than 25 points over a 30-day window, it's flagged as "Volatile". This may indicate:
How It Works#
LemWatch compares rolling averages and tracks standard deviations across your metric history. Anomalies are surfaced as actionable insights on your site's dashboard.
Content Change Tracking#
LemWatch also monitors your page content for changes:
Where to See Changes#
Navigate to your site's Changes tab to see a timeline of detected changes with severity and timestamps.
Related Articles
Baseline Comparisons
Capture a snapshot of your site metrics and compare future checks against it.
Setting Performance Budgets
Set thresholds and get alerted when metrics exceed your limits.
Autopilot safety rails
Guardrails that stop Autopilot from doing anything destructive — rate limits, confidence thresholds, blast radius caps, and one-click kill switch.
What is Lemwatch Pulse?
Pulse is a free public health scanner — anyone can drop in a URL and get a graded uptime, performance, security, and SEO snapshot in seconds.