New stores: 14 days of Protector freeFirst 25 stores.Uptime, daily scans, Slack and Telegram alerts. No card.See what’s included
Store Monitoring

Black Friday is the worst possible day to find out late.

Every failure a store can have costs more on Black Friday, for the obvious reason and one less obvious one: it is also the weekend you are least able to check. Traffic is at its annual peak, discount logic is at its most complicated, apps are being installed in a hurry, and an hour offline costs several times what an hour costs in March. This is what to do in the weeks before, what to watch during, and how the timezone maths works if you trade from New Zealand or Australia.

Scan your store freeSee pricing
Free plan, no credit cardRead-only connectionAlerts to email, Telegram, Slack or Discord

Two weeks before: change things now, not later

Almost every Black Friday incident traces to a change made close to the day. The single most effective thing you can do is finish changing the store early enough that anything broken has time to surface.

  1. Set a change freeze date — a week out is a reasonable minimum. After it, no theme edits, no new apps, no bulk catalog operations.
  2. Install and test every app you intend to use before the freeze, including the discount and upsell apps that only get exercised during a sale.
  3. Confirm your SSL certificate and domain registration both expire comfortably after the peak. Both are known dates, and both are catastrophic on the day.
  4. Run a full store scan and fix the critical findings, so the noise floor is low enough that a new alert means something.
  5. Walk the whole checkout on a phone, on mobile data, with a discount code applied and a shipping option selected.
  6. Verify your alert channels reach a phone. Send a test. Do not discover on Friday that the webhook expired in August.

The day before: baselines and thresholds

Anomaly detection compares against history, and Black Friday has no history that looks like Black Friday. Expect the baseline to be exceeded rather than met — that is fine, and it is the direction that does not hurt you.

What matters is the opposite: a period with zero orders during peak is louder and more meaningful on Black Friday than on any other day of the year, because the expected volume is so far from zero. Do not mute alerts because you expect a busy weekend. Busy is exactly when silence is diagnostic.

During: five things worth watching

Everything else can wait until Monday.

  • Orders arriving. A gap of even one quiet hour during peak is worth investigating immediately.
  • The store responding on your custom domain, checked every few minutes rather than by eye.
  • Prices, especially after any discount change. A stacked discount or an inverted compare-at price is a margin event at Black Friday volume.
  • Stock on bestsellers, because ads keep spending against a sold-out landing page.
  • Response time. Degradation under load precedes failure under load, and gives you a window to act.

If you trade from New Zealand or Australia

The timezone arithmetic catches people out every year. New Zealand is on NZDT (UTC+13) in late November, which puts it 18 hours ahead of US Pacific. Black Friday begins in New Zealand while the United States is still on Thursday, and the US peak — the small hours of Friday and Friday evening Pacific time — lands on Saturday in New Zealand.

Two practical consequences. If you sell to the US from NZ or AU, your busiest hours are overnight local time, which is precisely when nobody is watching the store: automated alerting is not a convenience, it is the only coverage you have. And if you sell domestically, your sale starts a full day before most international coverage and competitor pricing appears, so schedule the start deliberately rather than copying a US timetable.

Set your alert timezone to the market you sell to, not the one you live in, and make sure critical alerts go to a phone rather than an inbox you will read in the morning.

After: the part everyone skips

In the week following, clear expired sale prices and compare-at values, restock or unpublish anything that sold out, review which apps you installed in a hurry and remove the ones you no longer need, and note every incident with its detection time. That last list is what tells you whether your monitoring was fast enough, and it is the only version of the question you will be able to answer honestly next November.

What Cassian™ actually does

Specific checks, with the plan they run on.

Zero-order alerting compares each period against a weighted historical baseline — so during peak trading, an hour without orders stands out further from expectation than at any other time of year.

Every plan, including free. Hourly analysis on Guardian and above.

Uptime checks run every 5 minutes on Protector and Guardian and every minute on Prime, with a 30-second confirming retry before an incident opens.

Protector and above.

Price changes are diffed against the previous catalog snapshot with $0 and inverted sale prices treated as critical, and bulk changes of twenty or more variants grouped into one alert.

Every plan with a connected store; scheduled daily on Protector and above.

SSL certificate and domain registration expiry are checked daily and alerted as a countdown, so neither can surprise you during a peak weekend.

Protector and above.

Critical alerts can be routed to Telegram, Slack or Discord with a per-channel severity floor, so the channel that reaches your phone carries only what is worth interrupting a peak weekend for.

Protector and above. Email on every plan.

FAQ

Common questions

How do I protect my Shopify store during Black Friday?
Freeze changes about a week out, and finish installing and testing every app — including discount and upsell apps — before the freeze. Confirm SSL and domain expiry both fall well after the peak. Run a full scan and clear the critical findings so a new alert means something. Walk the checkout on a phone with a discount code applied. Then, during the weekend, watch five things: orders arriving, the store responding on your custom domain, prices after any discount change, stock on bestsellers, and response time under load. Make sure critical alerts reach a phone, because the weekend you are busiest is the weekend you check least.
Should I turn off alerts during a sale because volumes are abnormal?
No — reverse it. Anomaly detection compares against history, and peak volumes exceed the baseline rather than falling short of it, which is the harmless direction. Meanwhile a zero-order hour during peak is more diagnostic than at any other time, because expected volume is furthest from zero. Muting alerts for the weekend removes coverage exactly when an hour costs the most.
What is different about Black Friday for a New Zealand store?
The timezone. New Zealand is on NZDT (UTC+13) in late November, 18 hours ahead of US Pacific, so Black Friday starts in New Zealand while the US is still on Thursday, and the US peak lands on Saturday local time. If you sell to the US, your busiest hours are the middle of your night — automated alerting is the only coverage available. If you sell domestically, your sale opens a day before most international pricing appears, which is worth planning around rather than inheriting from a US calendar.
How late is too late to set monitoring up?
Order-flow alerting works from the first baseline, so connecting a store days before still gives you useful zero-order coverage. Uptime checks start as soon as a monitor is created. The thing you cannot do late is the change freeze and the pre-flight testing — those need a couple of weeks to be worth anything.

Keep reading

Store Monitoring Store Health Checklist Downtime Cost Calculator Shopify Uptime Monitoring Order Pulse — order-flow monitoring Pricing

Imagine if your store could tell you when something's wrong.

Free scan, results in minutes. Zero-order alerts on every plan, including the free one.

Scan your store freeSee pricing