What is a whale on Polymarket?
A trader who places very large bets.
Definition
A whale is a trader who places very large bets. There’s no official cut-off, and trackers each pick their own size.
In more detail
Whale trades are easy to spot because Polymarket positions are public. Size alone doesn’t mean skill, though: some whales lose big too.
Big positions near 95¢ or more are often money parked on an outcome the trader sees as settled, not a bold call.
How Nostra uses it
Nostra cares about how well someone trades, not how big. A whale only shows up in smart money if their score is 70 or more.
How the score worksRelated terms
Keep exploring
More from Nostra: rankings by topic, trader profiles, smart groups and plain-English guides.
Polymarket glossary
All 20 terms, from odds and resolution to smart money.
Top traders
Profiles for the 500 best-scored Polymarket traders, with stats and recent calls.
Smart groups
20 self-updating groups, from The Nostra 30 to Weather Wizards.
Smart money
Markets where 3 or more top-scored traders back the same side, checked every 6 hours.
How the score works
What goes into a Nostra score, how often it updates and where it falls short.
Guides
Plain-English guides to finding and following traders on Polymarket.
Nostra for iPhone
See Polymarket’s smart money on your iPhone
Nostra scores about 1,750 traders every week and lets you know when the best of them make a move.
Free to download · iPhone