The 90-Day Argument for Starting in October
Black Friday is decided in October.
That's not a productivity mantra — it's a data observation. The brands that execute BFCM well are the ones who understand, going into the sale window, exactly what their competitors' normal prices look like. They know which competitors inflate prices before Black Friday to create artificial anchor points. They know who runs early-access sales and who holds until Cyber Monday. They know the discount depths their category runs at — not as a guess, but as documented history.
You cannot build that picture in November. By the time you're in the BFCM sprint, you don't have capacity for intelligence gathering — you're executing. The research has to happen earlier.
The 90-day window (August through October) is when the price history that matters is created. Monitor your competitive set now, and you'll enter November knowing exactly what "normal" looks like — which is the only way to detect artificial anchoring when it happens.
The Anchor Price Problem
Here's the pattern that recurs every year across almost every e-commerce category:
A competitor's hero product sits at £89 for most of the year. In mid-October, the price quietly increases to £120. On Black Friday, they announce "33% off — now just £80!" Customers see a massive discount from £120 and feel urgency. The brand captures conversions at £80 — which is actually *lower* than their previous everyday price. Their Black Friday "sale" is a manufactured discount.
This is anchor price manipulation. It's not illegal. But it is deceptive — and it's pervasive.
The problem for competing brands: if you don't have price history data going back to August, you can't see that the £120 anchor is artificial. Your intelligence team looks at the competitor's site in November, sees £120, and reports "competitor prices at £120." Your pricing team models their discount response against a fraudulent baseline.
The defense is history. A price chart that shows a product at £89 for 6 months, then £120 for 3 weeks before Black Friday, tells the true story immediately. Without that history, you're flying blind.
How to Read a Price History Chart for BFCM
When reviewing competitor price charts in October, look for these signals:
Clean baseline (good data): The price holds steady for 60+ days at a single value, with no spikes. That's your true anchor. If they discount to this on Black Friday, it's not really a discount.
Pre-BFCM inflation: Price increases in September-October that break the stable baseline. This is the artificial anchor being constructed. Flag these competitors — their "Black Friday deals" are theater.
Flash sale patterns: Short 2-4 day dips below the baseline, not the multi-week BFCM window. These reveal the brand's minimum viable price. If they ran a flash at £72 in September, their BFCM floor is probably similar.
Post-BFCM correction: Look at last year's data (if you have it). Did prices return to the same baseline? If a competitor went to £80 for BFCM and then came back to £89, the baseline is £89. If they went to £80 and stayed there, the market repriced.
Building Your BFCM Competitive Monitoring Stack
By October 1st, you should have monitors running on the following:
Your primary competitors:
- 3-5 direct competitors selling comparable products at a comparable price point
- At minimum: their hero product and 2-3 products that directly overlap with your top sellers
Price anchors to watch:
- The "was" / original price displayed on their site (as well as the current price)
- Bundle pricing, which can obscure per-unit discounts
Channel diversity:
- Competitor's own DTC site (the authoritative price)
- Amazon listing for the same product (may differ — often lower)
- Major retailers carrying the brand (Sephora, ASOS, etc.) if relevant to your category
Check frequency: Daily from August through October. Increase to 30-minute checks from November 1st through December 2nd (Cyber Monday).
A typical BFCM monitoring stack for a D2C brand is 20-40 URLs. That's not a large number to maintain — but it requires setup and baseline-building time that simply doesn't exist if you start in late October.
The 5-Day BFCM Arc: What to Watch Each Day
BFCM isn't a single event. It's a rolling 5-day window with distinct phases:
Thursday (Early Access):
Most major brands now open BFCM deals 24-48 hours early for email subscribers. If you're monitoring at daily cadence, you'll miss these. 30-minute checks (available on DiffScout's Business plan) will catch early-access price drops within the hour. Watch for soft launches — small percentage off, limited SKUs.
Black Friday:
The main event. Price changes are fast and multiple within a single day on large competitive sites. 30-minute monitoring is the minimum. Watch for flash deepenings (a brand starts at 20% off, then escalates to 30% midday). These deepenings often signal underperforming sales.
Saturday:
Often overlooked. Brands that didn't hit their BF targets push harder on Saturday — either extending deals or adding bundle offers. This is a high-signal day for competitive intelligence: a brand that's quiet on Saturday is confident; one that pushes harder is chasing numbers.
Sunday:
Last chance before Cyber Monday. Watch for "last 24 hours" messaging that may be manufactured urgency, or genuine sell-through pressure on certain SKUs.
Cyber Monday:
The historically strongest day for digital-first and subscription products. Tech, software, and DTC supplement brands often see their best performance here. Watch for deal stacking (discount + gift with purchase + free shipping), which makes simple price comparison harder.
Flash Sale Detection: Why Daily Checks Miss Them
A flash sale is definitionally not catchable by daily monitoring. If a competitor runs a 6-hour flash sale on Saturday afternoon and your checks run at 8am and 8pm, you miss it entirely. Your data shows the price didn't change.
This is not hypothetical. Flash sales during BFCM are common tactics, especially among DTC brands. A 4-hour "BFCM extra 20% off" email sent to 300,000 subscribers can move significant volume — and you'll never know it happened if your monitoring cadence is too slow.
The solution is sub-daily monitoring during the BFCM window. DiffScout's 30-minute check interval on Business plans makes flash sale detection practically automatic: you'll know within 30 minutes of a flash going live.
What to do with flash sale intelligence:
- Note the depth of the discount (it reveals the brand's true floor price)
- Note the timing (early afternoon flashes often signal slow morning performance)
- Note whether the flash was extended (a brand that announces "ending in 4 hours" and then keeps the deal live is struggling to hit targets)
Post-BFCM Analysis: Learning for Next Year
The 30 days after BFCM are as valuable as the 90 days before it — if you document correctly.
What to capture:
- Each competitor's starting price (Oct 1), BFCM floor price, and post-BFCM return price
- The timing of their discounts (when did they first go live, when did they end)
- Their discount depth as a percentage of the October baseline (not the artificial November anchor)
- Any bundle or GWP offers layered on top of price discounts
The core question: Did prices return to pre-October levels, or has the market permanently repriced?
If a competitor doesn't return to their August baseline after BFCM, the category has repriced. Your next year's pricing strategy needs to account for a lower competitive floor. If all competitors return to baseline within 2 weeks, the BFCM window was promotional and the normal market structure holds.
This analysis takes about 2 hours in December. It's worth more than most year-end strategy sessions.
Quick-Reference Checklist: BFCM Monitoring Setup in 30 Minutes
- [ ] List your 5 primary competitors
- [ ] Identify 3-5 overlapping SKUs per competitor (15-25 URLs total)
- [ ] Add all URLs to DiffScout with daily check frequency
- [ ] Set alert threshold: any price change (not percentage-based — you want to see every move)
- [ ] Route alerts to the correct inbox (pricing/ecommerce lead, not general marketing)
- [ ] Note today's price for each URL — this is your October baseline
- [ ] Schedule a reminder for November 1st to increase check frequency to 30 minutes
- [ ] Set a post-BFCM review date for December 5th to analyze the data
The whole setup takes 30 minutes. The intelligence advantage it creates takes 90 days to build — which is exactly why you should start now.
*DiffScout monitors competitor prices on any website and sends email or webhook alerts within the hour. 30-minute checks are available on the Business plan. Start free →*