Scryup reads an Amazon product's sales-rank history the moment it starts trending and calls it by day 3: keeper or fast fade. Stock the keepers, skip the duds.
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 keeper calls, Scryup is right about 2 in 3 times at its three-week grade — versus a base rate where only about 3 in 10 trends last. The calls we publish stay up either way, so the record can be checked.
The method comes from quantitative trading: telling a signal that persists from noise that snaps back. We analyzed years of daily sales-rank history on thousands of Amazon products. A model then learned which early-days shapes preceded demand that held and which preceded a fade — trained on outcomes it could not see, and graded only on surges it was never trained on.
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 3 in 10 trends clear 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.
No vague hype. Measured across about 94,000 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 3 in 10 trends ever clear 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 7 in 10 trends end this way.
Both surge the same way. The split shows up later — right when most sellers have already committed inventory. Scryup makes the call on day 3, while the two are still indistinguishable by eye.
Illustrative curves, shaped to the medians we measure across about 94,000 US Amazon products. Lower = selling better.
Paste a product link or ASIN — the 10-character Amazon ID that starts with B0. No signup, no email.
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 the product's own trend track record. Pro adds the market snapshot: estimated units/day and seller count with a crowding flag.
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.
We tested it on data the model had never seen — then checked it live. Across thousands of graded calls, our keeper calls are right about 2 in 3 times at our three-week grade, against a base rate where only 3 in 10 trends last.
And our keepers keep going. On a keeper call, measured from the day we make it and counting every miss, about half are still selling strong two months later, and about 2 in 5 at three months — at least double their old pace, and twice the rate of an average surge. 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.
Only 3 in 10 trends last, so buying on instinct loses twice for every win. Scryup moves that ratio. It doesn't remove the risk.
Scryup scores every surge it finds across the products it tracks — 13,757 so far in 21 categories, 10,928 of them already graded against what happened next. Far too many to post, so a couple go on this board each day as the audit trail: posted the day we make them, 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 | Result at +42 days |
|---|---|---|---|---|---|---|
| Karen Kay Buckley's Perfect Scissors, Medium 6-Inch Mirco Se Arts, Crafts & Sewing | DUD | High | 6× | Pending — grades ~2026-11-29 | Pending — grades ~2026-12-20 | |
| MGA's Miniverse Make It Mini Animals Series 2 Mini Collectib Toys & Games | KEEPER | High | 15× | Pending — grades ~2026-11-28 | Pending — grades ~2026-12-19 | |
| AmScope SM-3B-80S Professional Binocular Stereo Zoom Microsc Electronics | DUD | High | 3× | Pending — grades ~2026-11-27 | Pending — grades ~2026-12-18 | |
| CELSIUS On-the-Go Powder Stick Packs, Zero Sugar (14 Sticks Grocery & Gourmet Food | KEEPER | High | 18× | Pending — grades ~2026-11-24 | Pending — grades ~2026-12-18 | |
| Pets Alive Mommy Capybara and Baby Surprise by ZURU - Roboti Toys & Games | KEEPER | High | 25× | Pending — grades ~2026-11-25 | Pending — grades ~2026-12-17 | |
| Microflex MF-300-M Diamond Grip Exam Gloves, PF Latex, Textu Industrial & Scientific | DUD | High | 21× | Pending — grades ~2026-11-25 | Pending — grades ~2026-12-17 | |
| KIND Bar Minis, Variety Pack, Dark Chocolate Nuts and Sea Sa Grocery & Gourmet Food | DUD | High | 14× | Pending — grades ~2026-11-25 | Pending — grades ~2026-12-16 | |
| Tork Multifold Hand Towel White H2, Universal, 100% Recycled Health & Household | KEEPER | High | 26× | Pending — grades ~2026-11-24 | Pending — grades ~2026-12-16 | |
| Dawn Powerwash Lemon Dish Spray, Dish Soap Starter Kit, 16 F Health & Household | KEEPER | High | 44× | Pending — grades ~2026-11-24 | Pending — grades ~2026-12-15 | |
| Worlds Smallest Bananagrams - Family Word Game - Includes: 1 Toys & Games | DUD | High | 2× | Pending — grades ~2026-11-23 | Pending — grades ~2026-12-15 | |
| 40000 Pcs 40 Colors Resin Jelly Rhinestones Kit, 3mm Flatbac Beauty & Personal Care | DUD | High | 16× | Pending — grades ~2026-11-24 | Pending — grades ~2026-12-14 | |
| Aquaphor Baby Wash and Shampoo, Unscented Baby Shampoo and W Health & Household | KEEPER | High | 14× | Pending — grades ~2026-11-19 | Pending — grades ~2026-12-13 | |
| Pledge Multi-Surface Rain Shower (Pack of 2) Health & Household | DUD | High | 5× | Pending — grades ~2026-11-21 | Pending — grades ~2026-12-12 | |
| Scotch Magic Tape, Invisible, Home Office Supplies and Back Office Products | KEEPER | High | 133× | Pending — grades ~2026-11-20 | Pending — grades ~2026-12-12 | |
| Hot Wheels 10-Pack of Toy Race Cars, Includes 1:64 Scale Cor Toys & Games | KEEPER | High | 9× | Pending — grades ~2026-11-20 | Pending — grades ~2026-12-11 | |
| Sally Hansen Insta-Dri Nail Color - 443 Va Va Violet Nail Po Beauty & Personal Care | DUD | High | 9× | Pending — grades ~2026-11-19 | Pending — grades ~2026-12-11 | |
| Febreze Plug In Air Freshener, Odor-Fighting Scented Oil Ref Health & Household | KEEPER | High | 1804× | Pending — grades ~2026-11-20 | Pending — grades ~2026-12-10 | |
| ELMERS GLUE ALL 4OZ WHT GLUE Office Products | DUD | High | 15× | Pending — grades ~2026-11-19 | Pending — grades ~2026-12-10 | |
| Dawn Dish soap Appl Blsm 3-66OZ TB Updated Health & Household | KEEPER | High | 3165× | Pending — grades ~2026-11-17 | Pending — grades ~2026-12-09 | |
| Shark Upright Vacuum, Stratos with DuoClean PowerFins, HairP Home & Kitchen | DUD | High | 3× | Pending — grades ~2026-11-17 | Pending — grades ~2026-12-09 | |
| Aquatabs 49mg Water Purification Tablets (50 Pack). Water Fi Sports & Outdoors | KEEPER | High | 19× | Pending — grades ~2026-11-17 | Pending — grades ~2026-12-08 | |
| 4 Inch Mass Market Paperback Book Cover in Stretch Fabric (B Office Products | DUD | High | 6× | Pending — grades ~2026-11-16 | Pending — grades ~2026-12-08 | |
| Fisher-Price Wood Montessori Toy Triangle Puzzle, American M Toys & Games | DUD | High | 4× | Miss — Held — our miss, it stays on the board. | Pending — grades ~2026-12-06 | |
| WOSPORTS Rechargeable Trail Camera 2Pack 56MP 4K Game Cam 0. Sports & Outdoors | DUD | High | 2× | Right — Faded — back near its old rank by day 21. | Pending — grades ~2026-12-04 | |
| P&J (variant family, 4 listings) Arts, Crafts & Sewing | KEEPER | High | 27× | Right — Held — 12.9× its old pace on day 21. | Pending — grades ~2026-12-04 | |
| The Legend of Heroes: Trails (variant family, 5 listings) Video Games | KEEPER | High | 8× | Miss — Faded — a miss, it stays on the board. | Pending — grades ~2026-12-03 | |
| Scott Products 75130 Scott Shop Towels Industrial & Scientific | DUD | High | 6× | Right — Faded — back near its old rank by day 21. | Pending — grades ~2026-12-03 | |
| Utopia Bedding Flat Sheets - Pack of 6 - Soft Brushed Microf Home & Kitchen | DUD | High | 2× | Right — Faded — back near its old rank by day 21. | Pending — grades ~2026-12-02 | |
| Beistle Pin The Eyeball On The Zombie Games - 1 Pc Toys & Games | KEEPER | Sale survivor | 17× | Six-week call — Graded at 6 weeks (sale-survivor calls skip the 3-week grade): faded. A miss -- it stays on the board. | Miss | |
| Honeywell HT-904 TurboForce Tabletop Air Circulator Fan, Sma Home & Kitchen | KEEPER | High | 11× | Right — Held — 11.7× its old pace on day 21. | Pending — grades ~2026-12-02 |
How to read this board. 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. A KEEPER call means our model expects the surge to last: on held-out data and on our live record, about 2 in 3 are still selling at three weeks — against a ~3-in-10 base rate.
LIVE rows were posted in real time. SEMI-LIVE rows were posted a few days after their call date, but while still pending, before any verdict existed. BACKTEST rows apply the same rules day by day to held-out history the model was never trained on (trained through Feb 2026; every backtest call starts after its last training label).
Every call — all three kinds — is graded against one bar, fixed 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. The six-week counter asks that same question again over days 31–42 instead of 10–21 — nothing is redefined, just asked later, because sourcing takes weeks.
No judgment calls, no moved goalposts: every miss is shown, and nothing is ever removed or edited. Fewer calls carry a six-week verdict than a three-week one — some are simply too young, and a few can never get one, because the product stopped selling so completely that its rank data goes flat and there is nothing left to measure. Those are left out rather than counted as wins.
The free check is yours forever. Scryup Pro removes the limits and watches your inventory for you.
Only want the Q4 pre-season list? It is $79 on its own, and the full $79 comes off an annual plan if you upgrade within 30 days.
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 our keeper calls, right about 2 in 3 times at our three-week grade — when only ~3 in 10 trends last 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 keeper call and counting every miss: about half are still selling strong two months later, and about 2 in 5 at three months — twice the rate of an average surge. Long enough to source, land, and sell through.
We check. Pro flags any surge that began alongside a price cut of 15% or more, so you don't mistake a promo bump for organic demand.
Pro 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 keeper call still misses about 1 in 3 times at three weeks. We publish that so you can size your buy accordingly — being right about 2 in 3 is still more than double the rate at which trends last on their own, 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 method comes from quantitative trading: telling a signal that persists from noise that snaps back. We analyzed years of daily sales-rank history on thousands of Amazon products. A model then learned which early-days shapes preceded demand that held and which preceded a fade — trained on outcomes it could not see at call time, and graded only on surges it was never trained on. That is why the calls we publish stay up with their results: the track record is the test.
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.