Spotted in China. Then it took off.
Every product here was flagged by SparkHunt while it was still unknown on Amazon US. The line shows how many days it took before sellers there caught on.
—products flagged
—took off abroad
—median head start
Took off after we flagged them
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Still early
Flagged, but not big abroad yet. Not every spark catches; we show these too.
How we measure this
A product is flagged the first time its SparkHunt score for the US market reaches 70. At that moment we record how many reviews similar listings had on Amazon US. It took off once those listings reached five times as many reviews, and at least 200. Reviews lag sales, so real demand usually arrives sooner than these dates show.
We only show products flagged at least two weeks ago, so this page never gives away today's picks. Past results don't guarantee future ones.