Scryup analyzes an Amazon product's sales-rank history the moment it starts trending and calls it by day 3 — keeper or fast fade — from the data, not a hunch. Stock the keepers, skip the duds.
When a product's genuinely surging, the report also sizes the market for you: estimated units/day, how many sellers are on the listing (and whether they're piling in), the product's own trend track record — and a flag if the spike was just a price cut.
Both surge the same way. The split only shows up later — which is exactly when most sellers have already committed inventory.
Illustrative curves, shaped to the medians we measure across the tens of thousands of US Amazon products we track daily, indexed to each product's own pre-surge rank. Lower = selling better.
When a product starts blowing up, you need to make an immediate decision: stock up, or stay out. Get it right and you ride the wave. Get it wrong and you're sitting on dead stock, marking it down, and paying to store it. And the meter runs while you decide: monthly storage from the day it lands, aged-inventory surcharges from day 181 — and if it's Q4, storage rates that sting from week one.
The hard part isn't spotting what's hot — everyone can see that. And "everyone" includes the twenty other sellers about to jump on the listing and split the buy box. The hard part is knowing what stays hot — and what fades fast. In our data, most duds are back near their old rank within about two weeks, and only about 1 in 3 trends clears our three-week keeper bar. The ones that clear it tend to keep selling for months — but you can't just wait for proof: by the time a trend is obviously real, the listing is crowded, the buy box is split, and your sourcing window has closed. The margin goes to whoever knew at day 3.
No vague hype. Here's precisely what we're talking about, measured across the tens of thousands of US Amazon products we track daily in 21 major categories.
Every trending product becomes a keeper or a dud. Scryup's whole job is to call which — on day 3, before you commit.
Paste one product you're weighing. Our engine reads its full sales-rank history and emails you the Keeper-or-Dud report — verdict, chart, the reasons behind it, and a market snapshot of sales volume and seller crowding — usually within minutes of you confirming your email. This is exactly what lands in your inbox: a slimmed-down, self-serve taste of the full engine. Free, and yours to run as often as you like.
On top-confidence calls like this one, about 2 in 3 are still selling at three weeks — vs about 1 in 3 of all trends.
We expect this product's demand to hold strong over the coming weeks.
Sales rank, inverted so higher = selling better. Shaded = Scryup projection.
Sales rank improved about 18× off its baseline in a matter of days — far steeper than a typical short-lived bump.
It ranked well below the usual level for Home & Kitchen before the surge — breakouts from obscurity tend to last; bumps on already-popular items tend to revert.
A prediction from data analysis, not a guarantee. On top-confidence calls like this one, Scryup is right about 2 in 3 times at its three-week grade (base rate: ~1 in 3). Not sourcing advice.
That report is a taste of the engine. Scryup — the tool we're building — never stops working for you.
Paste any product, get the data-backed keeper-or-dud call in seconds — as many as you want. Including ULTRA calls: our highest tier, about 2 in 3 still selling at three weeks on held-out data.
Track the products you hold or have your eye on. In our data, about half of trending products trend again within four months — and the second wave is typically as big as the first. We catch it for you, and warn you when a winner starts to fade.
The trends in your categories our data says will last, a do-not-chase list — and the pre-season radar: products that surged this month last year repeat about 1 in 3, three times the base rate. We list them before the season starts.
Stock the keepers. Skip the duds. Stop getting caught with dead stock. The free lookup is yours to use right now — and the first 50 people on the weekly list become founding members: early access to each piece as it ships, a say in what we build, and 50% off the first year when paid plans launch. Join the weekly list →
Other tools either show you a chart and make you guess, or promise "winning products" and never say how often they're wrong. We do the opposite.
We make a real forward call — sustain or fade, over a defined window — not a vague score.
We tested it on data the model had never seen. On hundreds of top-confidence calls held out from training, we're right about 2 in 3 times at our three-week grade, against a base rate where only 1 in 3 trends lasts.
And our keepers keep going. On a top-confidence keeper call, measured from the day we make it and counting every miss, about 6 in 10 are still selling strong two months later — and about half at three months. And they don't limp along: a keeper holds a plateau near its surge level, selling at least double its old pace. Long enough to source, land, and sell through.
We tell you when we're not sure. We constantly work on ways to improve our model — but we still can't get a read on every trend. When that happens, we say so honestly.
It's a prediction, not a crystal ball. But follow every trend blindly and the deck is stacked against you — only 1 in 3 lasts. With Scryup, you make decisions with the odds on your side.
For maximum accountability, we make our calls in public — a fresh call and a graded result, every day — and we keep score right here: every call posted the day we make it, then graded three weeks later against what the sales rank actually did. Hits and misses both stay on the board — follow along on X @scryup.
How to read it: Rank jump is how many times the product's Amazon sales rank improved over its own pre-surge baseline at the moment of the call. High and ULTRA are our keeper-confidence tiers. ULTRA is the highest — a top-confidence call on a product that already proved a past trend; about 2 in 3 are still selling at three weeks on held-out data. A plain High call clears the same three-week bar just under half the time — still well above the ~1-in-3 base rate. Every call is graded against the same fixed bar, set before the call is made: three weeks after the surge began, is the product still selling at at least 2× its pre-trend pace AND ranking at a level that puts it among its category's proven sellers? Clears both = a keeper call was right. Fails either = a dud call was right. No judgment calls, no moved goalposts — the bar is identical for every product on this board.
Each call was generated from only the data available on the date shown, then graded 21 days later. The engine's training data ends before any of these calls begin — nothing here is fitted after the fact. Pending calls get graded on schedule, right or wrong.
One short email a week: the products surging on Amazon right now, our keeper-or-dud verdict on each, and how the calls we made three weeks ago actually graded. No spam — unsubscribe anytime.
★ The first 50 subscribers become founding members — 50% off the full tool for your first year when paid plans launch.
Paste one ASIN you're actually weighing. Our engine reads its full sales-rank history and emails you the Keeper-or-Dud verdict — with honest odds, the sales-rank chart with our projection, the two reasons behind the call, and a market snapshot: estimated units/day, seller crowding on the listing, the product's own trend history, and a promo-spike check. Free, and yours to run as often as you like. Want the weekly rundown and founding-member perks too? Grab the free digest above.
Scryup reads amazon.com today. Tell us where you sell and we'll email you the moment we expand there — the most-requested marketplace gets built first.