Can you auto-copy a trader on Hyperliquid?

Yes. Hyperliquid has delegated signing built in: you approve an agent wallet with one signature, and that key can place orders but can never withdraw or move funds. You can revoke it at any time.

Which venue is easier to copy profitably?

Hyperliquid, for two reasons that have nothing to do with the traders: it supports delegated signing, and its positions can be exited whenever you want. A Polymarket position often ends by resolution at 0 or 1, so copying an entry late is much harder to recover from.

What is the minimum you need to copy a trade?

Hyperliquid rejects orders under $10 of notional; Polymarket under about $5. That floor is what breaks proportional copying for small accounts: below roughly $5,000 of capital most copied orders get pushed up to the floor, which silently oversizes them relative to the leader.

Hyperliquid vs Polymarket: which one can you actually copy?

Short answer: on Hyperliquid you can automate it; on Polymarket you cannot, and the reason is not the traders — it is what each venue lets a signer do. Everything below is measured against both venues' own APIs.

1 · Who is allowed to sign your orders

Copying automatically means something has to place an order while you are asleep. That is a signing question before it is a trading question.

Hyperliquid has delegation built in. You approve an agent wallet with a single signature: a key that can place orders but can never withdraw, transfer or move capital out. You keep custody, and you can revoke it whenever you want.

Polymarket does not have an equivalent for its prediction-market order book. Funds sit in a deposit wallet that is an immutable contract with the owner's address written into its bytecode: it has no function to register an extra signer, so its signature validation can only ever accept the owner. Asking their order book to trade with a third-party key returns a flat no deposit wallet found for owner. We know because we built it, tested it against production and it cannot work — a delegation primitive does exist in their perpetuals product, but their own documentation says it applies exclusively to perpetuals trading, not to prediction markets.

Practical consequence: any service that claims to auto-copy Polymarket for you is either signing from your own machine, or holding your keys. There is no third option today.

2 · How long you have to react

A copy is only worth placing while the leader's price is still there. We refuse to replay any fill older than 120 seconds on either venue — chasing a price that already moved is how copytrading turns a profitable leader into a losing follower.

That window is what makes style decisive. An account holding positions for days can be mirrored comfortably. A scalper closing in about a minute cannot: by the time a signal travels leader → detection → your order, the edge is gone. This is why we score copyability rather than profitability.

3 · The minimum order, and why it hurts

Hyperliquid rejects orders below $10 of notional; Polymarket below about $5. Proportional copying says: if the leader puts 0.4% of their capital into a trade, you put 0.4% of yours. With a small account that number often lands under the floor — and then the order is either dropped or pushed up to the minimum, which means you are no longer copying proportionally. You are taking a bigger relative bet than the leader.

Rough rule from our own sizing: below roughly $5,000 of capital most copied orders end up at the floor. That is not a reason to avoid copying — it is a reason to know it, and to prefer leaders whose position sizes are large enough that your proportional share clears the minimum on its own.

4 · How positions end

On Hyperliquid a position ends when someone closes it, so a mirrored position can be exited on your own terms, and a late entry can still be salvaged.

On Polymarket most positions end by resolution: the market settles and the outcome token is worth exactly 1 or 0. Copying an entry a few cents late is not a small slippage cost — it changes the payoff of a binary bet. It also means the leader's "win rate" is a much blunter instrument than it looks: what matters is the price they paid.

5 · So what should you do

If you want automation today: Hyperliquid, with an agent wallet you approve and can revoke.
If you want to follow Polymarket traders: study them and paper-trade them. Anyone promising hands-off copying there is describing something the venue does not support.
On either venue: pick by whether you can mirror the entries, not by the size of the PnL. A brilliant scalper is worth nothing to a copier.

Frequently asked

Can you auto-copy a trader on Polymarket?: Not through a third party. Polymarket's order book requires every order to be signed by the owner of the deposit wallet that holds the funds, and that wallet is an immutable contract with the owner's address written into it. There is no way to authorise someone else's signer, so no service can place orders on your behalf. Tools that copy on Polymarket do it by signing from your own wallet, locally.
Can you auto-copy a trader on Hyperliquid?: Yes. Hyperliquid has delegated signing built in: you approve an agent wallet with one signature, and that key can place orders but can never withdraw or move funds. You can revoke it at any time.
Which venue is easier to copy profitably?: Hyperliquid, for two reasons that have nothing to do with the traders: it supports delegated signing, and its positions can be exited whenever you want. A Polymarket position often ends by resolution at 0 or 1, so copying an entry late is much harder to recover from.
What is the minimum you need to copy a trade?: Hyperliquid rejects orders under $10 of notional; Polymarket under about $5. That floor is what breaks proportional copying for small accounts: below roughly $5,000 of capital most copied orders get pushed up to the floor, which silently oversizes them relative to the leader.

Every number here comes from each venue's official API or from our own execution engine — see the methodology, or browse the audited leaderboard.