WhalesInsider
Automated copy trading on Polymarket
WhalesInsider tracks large Polymarket wallets, scores them on their settled record, and shows subscribers what copying each one would have paid. This page describes the next step — placing those copies automatically — and, more to the point, the limits of what the integration is able to do.
What it does
A subscriber picks wallets from the traders table — ranked by what following each one would have returned over a window they choose. When a followed wallet buys into a market, the integration places the same side for the subscriber, sized by their own rule rather than the whale’s, within limits they set in advance.
Orders are the subscriber’s own: their funds, their account, their position. WhalesInsider routes the order and keeps the record. It does not pool money, manage a fund, or take a share of anyone’s position.
How it is authorised
Through Polymarket Session Keys. The subscriber signs one authorisation with their own wallet, which appoints our signer to trade for their Deposit Wallet. We never see, hold, or store a private key, and no password or seed phrase is ever requested.
The properties that matter, all enforced by Polymarket rather than by us:
- A session key cannot withdraw funds. It can place and cancel orders. Moving money out of the wallet is not something it is able to do, whatever we or an attacker asked of it.
- It expires. Authorisations are issued for 180 days and then stop working.
- It is revocable at any time by the wallet owner, and revoking cancels the orders that key has open.
- It is scoped to order flow, and the key can only read back the orders it submitted itself.
Limits the subscriber sets
Authorisation is not the same as consent to anything. Before a single order is placed, the subscriber fixes the boundaries, and the integration refuses to act outside them:
- stake per copied trade, in dollars — not a multiple of the whale’s size;
- a daily ceiling, after which nothing more is placed until the next day;
- a maximum entry price, so a move between the whale’s fill and ours cancels the copy;
- which categories to follow, and how many positions may be open at once;
- a stop that halts everything immediately and revokes the key.
What we cannot do
We cannot withdraw or transfer funds, change account settings, sign anything other than an order, or act after the key expires or is revoked. There is no arrangement in which WhalesInsider holds customer assets.
Risk
Copying a wallet is not a strategy with a known outcome. Every figure we publish is settled history, measured on resolved markets, and a wallet that was right for ninety days can be wrong tomorrow — several of the best records in our own table contain long flat stretches and deep drawdowns, which is why the table draws the shape of the return rather than only its total. Prediction markets can lose the full stake on a single resolution. Availability follows Polymarket’s own: where Polymarket does not serve a person, neither does this.
Contact
Technical questions about the integration, or anything Polymarket’s builder team needs from us: [email protected]. The data behind the rankings is documented at /developers.