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Smarter Price Alerts and Self-Healing Trackers

Smarter Price Alerts and Self-Healing Trackers

·by DealMonitor Team·3 min read
featurealertsreliabilityreports

This week we improved two things in DealMonitor that you'll notice in everyday use: you'll get fewer redundant price alerts, and when a tracker ever picks up the wrong price, you can fix it yourself — no need to message us.

Smarter alerts: no more repeats

Until now, DealMonitor sent a notification every time a scraped price was at or below your target — even when that price had been stable for days. That was sometimes spammy, especially during long-running sales.

From now on, a new rule applies: an alert only goes out when something new happens. Specifically:

  • First time the target is reached — classic alert
  • Every new low below that — also worth knowing
  • Stable below target — no more spam
  • Price climbs back above target — the alert is re-armed; the next dip below the target triggers a fresh notification

Example: you want a laptop at 1500 EUR. Today it drops to 1500 — ping, mail. Tomorrow 1500 — nothing. Day after, 1450 — ping, new low. Then it climbs back to 1600. A week later, 1500 again — ping, fresh opportunity.

Self-healing trackers: wrong price? One click.

Sometimes our detection system learns the wrong price on a complex shop page — for example a shipping fee or a bundle price instead of the main product. Until now, you had to report it to us and wait for a fix.

Now it's faster: when you report a tracker with reason “wrong price”, we ask you for the correct price. If you provide it, three things happen automatically:

  1. We reset the learned price selector
  2. The tracker is immediately re-scraped
  3. Our ML model looks for the element containing the price you provided, and remembers it for next time

You see the result in your dashboard after 10-20 seconds. If detection is still off, you can report the tracker again — previously you could only do that once.

Better price detection in the background

We also overhauled the underlying price heuristics:

  • Formatted prices like 1,299.00 EUR are now picked before stray digits from the product name — this fixes cases where “14” (screen inches) was extracted as a price instead of “1299” on a 14-inch laptop
  • Prices that deviate more than 10x from the historical average are rejected — instead of firing a false alert, we just rescrape next cycle
  • Shops where our normal method repeatedly returns garbage are automatically switched to our heavier-duty Robot Browser

These changes are invisible but they make sure the alerts you do receive are actually relevant — and that false matches show up less often in our daily status report.

Getting started

Nothing to configure — everything is on by default. If you have a tracker with the wrong price, just click the report icon on the tracker card and enter the correct price. The system takes it from there.

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