Polymarket whale tracking: follow skill, not size

What a whale tracker shows

Most whale trackers alert on fills above a dollar threshold, usually address by address. That is useful for one thing: seeing where large money is moving right now. It says nothing about whether that wallet has been right before, or whether the fill is a bet at all.

Why the biggest fills mislead

Large fills come from very different traders. A market maker quoting both outcomes trades large size all day and has no view on the result. A hedger may be offsetting a position elsewhere. An arbitrageur trades related markets against each other. Only some large fills are directional bets, and plenty of wallets that trade big lose money over a month.

Turn a whale into a track record

Before following a large wallet, ask five things. Did it make money over a stated window, counting only markets that settled? Does its win rate stay high at the lower bound of its confidence interval, over enough decided markets? Is there profit left after removing its single best market? Does it make liquidity or take it? Is it still trading? PMWallets answers each of these for every entity on the board.

One trader, several addresses

A Polymarket trader signs with one address and holds positions through a proxy, and some spread their trading over several wallets. Address-level alerts either miss part of what they do or count it twice. PMWallets clusters the addresses that demonstrably trade as one into a single entity, so the record and the alerts cover the whole trader.

Alerts only for traders you chose

Instead of an alert for every fill above some size, subscribe to the entities that pass the record test. Each of their fills is pushed over WebSocket or a signed webhook, typically within a second of the block — to the feed page in your browser, or to your own bot. It costs $0.01 per trader per hour, and every plan includes some traders for free.

Size still matters — as context

Once you follow a trader for their record, size becomes informative again. A fill far above their usual size is conviction; the entity page shows their median fill and how uneven their sizing is, so an outsized bet stands out.

What is a Polymarket whale?

A wallet that trades large amounts. There is no fixed threshold; trackers usually pick a fill size such as $10,000. Being a whale says nothing about being profitable — many of the largest traders are market makers or hedgers.

Is following Polymarket whales profitable?

Not by size alone. Following a wallet only makes sense if its record holds up: realised profit over a window, a win rate whose confidence interval stays high, profit left without its best market, and a style you can actually follow. Past results never guarantee future ones.

Can I get an alert when a specific Polymarket trader trades?

Yes. Subscribe to the entity on PMWallets and each fill is pushed to you over WebSocket or a signed webhook, typically within a second of the block, and shown on the feed page.