Scryup reads 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.
Both surge the same way. The split shows up later — right when most sellers have already committed inventory.
Illustrative curves, shaped to the medians we measure across tens of thousands of US Amazon products. Lower = selling better.
A tool for Amazon sellers that reads a product's sales-rank history the moment it starts trending and predicts, by day 3, whether the trend will keep selling for months (a keeper) or fade fast (a dud) — so you stock the keepers and skip the duds.
On its top-confidence calls, Scryup is right about 2 in 3 times at its three-week grade — versus a base rate where only about 1 in 3 trends last. Every call is graded in public.
The instant ASIN check is free. Scryup Pro is $39/mo or $290/yr and adds unlimited checks, a weekly Surge Report, and a personalized watchlist.
When a product blows up, you have to decide now: 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 — monthly storage from the day it lands, aged-inventory surcharges from day 181, and in Q4 the storage rates sting from week one.
And "everyone can see it's hot" includes the twenty other sellers about to jump on the listing and split the buy box. 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. You can't just wait for proof: by the time a trend is obviously real, the listing is crowded and your sourcing window has closed. The margin goes to whoever knew at day 3.
Paste a product link or ASIN — the 10-character Amazon ID that starts with B0. Give us your email and we send the verdict there.
We pull its full daily sales-rank, price, and seller-count history and score the surge against thousands of past trends with the same shape — including whether a price cut started it.
Keeper, Dud, Borderline, or Not Trending — with a confidence rating, the two reasons behind it, and a market snapshot: estimated units/day, seller count with a crowding flag, and the product's own trend track record.
No vague hype. Measured across the tens of thousands of US Amazon products we track daily in 21 major categories.
A sudden jump. At day 3, you can't yet tell if it'll last.
A product selling far faster than its own recent normal — sales rank improves by at least half — and holding that jump for at least a few days. Not a one-day blip.
Decision time. The sourcing window is open for days, not weeks — this is exactly when the keeper-or-dud call has to land.
Jumps — and stays up for weeks.
A trend with staying power. Three weeks in, it's still selling strong — and keepers tend to keep going for months.
Worth stocking — a keeper usually has months of demand ahead, not weeks. Only about 1 in 3 trends ever clears that bar.
Jumps the same way — then falls back to normal within ~2 weeks.
A fast fade. The trend collapses back toward the product's old, ordinary sales level within the first week or two.
Don't stock up — you'd be racing the storage clock to sell off at a loss. About 2 in 3 trends end this way.
Paste one product you're weighing. Our engine reads its full sales-rank history and emails you the verdict — chart, the reasons behind it, and a market snapshot of sales volume and seller crowding. This is a self-serve taste of the full engine — one free check a day.
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.
The free report is a taste of the engine. Scryup Pro runs it unlimited, watches the products you hold around the clock, and sends a weekly feed of durable trends. See plans →
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, at least double their old pace. Long enough to source, land, and sell through.
We tell you when we're not sure. We 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 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.
| Called | Product | Call | Confidence | Rank jump | Result at +21 days |
|---|---|---|---|---|---|
| Mario + Rabbids Sparks of Hope – Standard Edition Video Games | KEEPER | High | 23× | Pending — grades ~2026-09-12 | |
| Knee Brace for Meniscus Tear 2 Pack, Knee Compression Sleeve Sports & Outdoors | DUD | High | 5× | Pending — grades ~2026-09-15 | |
| DR Strings HI-DEF NEON Electric Guitar Strings (NPE-9),Pink Musical Instruments | DUD | High | 17× | Pending — grades ~2026-09-15 | |
| Evans RealFeel - Drum Practice Pad - Drum Pad - Drummer Prac Musical Instruments | KEEPER | Ultra | 15× | Pending — grades ~2026-09-14 | |
| 230W Laptop Charger Adapter Compatible with Lenovo Legion 5 Electronics | DUD | High | 5× | Pending — grades ~2026-09-13 | |
| Tiki Cat Friends Tuna & Pumpkin, Grain Free & High Moisture, Pet Supplies | DUD | High | 3× | Pending — grades ~2026-09-11 | |
| Milwaukee 48-32-5033 Power Drill Bit Extensions Shockwave So Tools & Home Improvement | DUD | High | 3× | Pending — grades ~2026-09-10 | |
| DONAMA Comfortable and Breathable Pillowcase for Cervical Pi Home & Kitchen | DUD | High | 3× | Pending — grades ~2026-09-09 | |
| Mobil 1 Advanced Fuel Economy Full Synthetic Motor Oil 0W-16 Automotive | KEEPER | High | 9× | Pending — grades ~2026-09-11 | |
| Not Your Mother's Curl Talk Bond Building Shampoo and Condit Beauty & Personal Care | DUD | High | 3× | Pending — grades ~2026-09-08 | |
| Pickclub 5% Minoxidil with Biotin for Men and Women – Hair a Beauty & Personal Care | DUD | High | 4× | Pending — grades ~2026-09-07 | |
| Illy Intenso Ground Drip Coffee, Bold Roast, Intense, Robust Grocery & Gourmet Food | KEEPER | Ultra | 20× | Pending — grades ~2026-09-09 | |
| Refill Cartridges, 10 Pack 2026 Upgraded Refills Compatible Garden & Outdoor | DUD | High | 2× | Pending — grades ~2026-09-07 | |
| BITZEE, Doghouse Interactive Toy with 15 Puppies Inside, 3D Toys & Games | KEEPER | Top | 19× | Pending — grades ~2026-09-06 | |
| CHNZAO 7" Real Left Handed Scissors,Lefty Scissors Kids,Poin Office Products | DUD | High | 5× | Pending — grades ~2026-09-04 | |
| Philips Smart Lighting Connected Light Bulbs, 2-Pack, Color Tools & Home Improvement | DUD | High | 3× | Pending — grades ~2026-09-03 | |
| HOWEASY Portable Power Station 300W, 222Wh Solar Generator w Garden & Outdoor | DUD | High | 3× | Pending — grades ~2026-09-02 | |
| TOP XIAN Plastic Hummingbird Feeder, 2-Pack 14 OZ Ant & Bee Garden & Outdoor | DUD | High | 3× | Pending — grades ~2026-09-02 | |
| THERMOS FUNTAINER 16 Ounce Stainless Steel Vacuum Insulated Home & Kitchen | DUD | High | 3× | Pending — grades ~2026-08-31 | |
| Dunwell Plastic 2-Pocket Folders for 3-Ring Binders, (6 Pack Office Products | DUD | High | 2× | Right — Faded — back near its old rank by day 21. | |
| 3062Pcs Gem Stickers-Self-Adhesive Face Jewelry Stickers, Ac Arts, Crafts & Sewing | DUD | High | 5× | Right — Faded — back near its old rank by day 21. | |
| 2025-26 Topps Chrome Basketball - Factory Sealed - Mega Box Sports & Outdoors | KEEPER | Ultra | 1867× | Right — Held — 971.1× its old pace on day 21. | |
| Paper Towel Dispenser Key, 30Pcs Universal Dispenser Key Com Industrial & Scientific | DUD | High | 4× | Right — Faded — back near its old rank by day 21. | |
| SAMZX Reusable Water Coloring Books for Toddlers 1-3, 4 Pack Toys & Games | DUD | High | 2× | Right — Faded — back near its old rank by day 21. | |
| Betadine Antiseptic Cleansing Foam Pump, 8oz, Antibacterial Beauty & Personal Care | DUD | High | 5× | Right — Faded — back near its old rank by day 21. | |
| DUMOS Adjustable Padded Keyboard Bench, X-Style Collapsible Musical Instruments | DUD | High | 2× | Right — Faded — back near its old rank by day 21. | |
| Waterdrop XWFE Refrigerator Water Filter, Built-in Chip, Rep Appliances | DUD | High | 3× | Right — Faded — back near its old rank by day 21. | |
| ALORAIR Magnetic Dryer Vent Connector Kit | DV180 Airtight S Appliances | KEEPER | Top | 113× | Right — Held — 79.2× its old pace on day 21. | |
| Spigen Slim Carrying Case for Nintendo Switch 2 (2025), Prot Video Games | DUD | High | 4× | Right — Faded — back near its old rank by day 21. | |
| Mini Karaoke Machine for Kids Adults, 2026 TOP Birthday Gift Musical Instruments | KEEPER | Top | 20× | Right — Held — 12.0× its old pace on day 21. |
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 — 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 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 free check is yours forever. Scryup Pro removes the limits and watches your inventory for you.
Secure checkout by Stripe · cancel anytime · any applicable tax is shown at checkout. The free instant lookup stays free — Pro just removes the limits and adds the weekly report and watchlist.
Not sure it's really trending? Send it anyway — "Not Trending" is a real verdict, and knowing that before you buy is the whole point.
One email a month: the products that surged on Amazon, our keeper-or-dud verdict on each, and how earlier calls actually graded. Pro members get it weekly, the week each surge breaks. No spam — unsubscribe anytime.
The 10-character Amazon product ID (starts with B0), in every product URL.
They show you history and let you guess. Scryup makes the forward call — will this trend last — and tells you how confident we are.
On top-confidence calls, right about 2 in 3 at our three-week grade — when only ~1 in 3 trends lasts at all. It's a prediction made from data analysis, not a guarantee.
The right question — sourcing takes weeks. Measured from the day we make a top-confidence call and counting every miss: about 6 in 10 are still selling strong two months later, and about half at three months. Long enough to source, land, and sell through.
We check. The report flags any surge that began alongside a price cut of 15% or more, so you don't mistake a promo bump for organic demand.
The report shows the seller count now vs. before the trend, with a crowding flag — so you can judge whether the buy box is about to get split before you commit units.
A top-confidence keeper call still misses about 1 in 3 times at three weeks. We publish that so you can size your buy accordingly — being right 2 in 3 is still more than double the ~1-in-3 base rate, not a guarantee.
Amazon US (amazon.com) for now, working from full daily sales-rank, price, and seller-count history. Expansion into other Amazon marketplaces is on the roadmap — members get a say in which comes first.
Selling elsewhere? Tell us your marketplace and we'll notify you when we land there →
We'll tell you exactly that — plainly, with the data. "Not Trending" is a real verdict, and knowing it before you buy costs you nothing.
The instant ASIN lookup is free — one check per day. Scryup Pro ($39/mo, or $290/yr and save 38%) unlocks unlimited checks, the weekly Surge Report, and a personalized watchlist. A Scale tier (from $2,499/yr) adds continuous monitoring of your whole catalog.
No. It's a prediction made from data analysis, to inform your own decision. Not sourcing or investment advice.
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.