What Bulk is

Bulk is a Solana-native perpetuals exchange, and the second venue you can trade from the WatchCrypto terminal. It uses a Solana wallet rather than an Ethereum one, and connecting takes a single signature.

As on Hyperliquid, what you authorise is a trading-only key. It cannot withdraw, and your funds stay in your own Bulk account throughout.

What you need

A Solana wallet: Phantom, Backpack or Solflare all work, as does any wallet implementing the Solana wallet standard.
USDC on Solana in that wallet.
A WatchCrypto account. You must be signed in before you connect Bulk — unlike the Hyperliquid flow, the Solana wallet links to an existing session rather than creating one. Signing in with Google or email takes a few seconds if you have not already.

Step 1 — Sign in

Open the terminal and sign in through the Connect card — Google, email, or an Ethereum wallet. Any of them gives you the account that the Bulk connection will attach to.

Step 2 — Choose Bulk

In the Connect card pick Bulk, then your Solana wallet from the list. The terminal detects the wallets your browser actually has installed, so if yours is missing, check the extension is enabled and reload.

Step 3 — Sign once

Your wallet shows one message to sign. That single signature carries two approvals:

A trading-only agent key, so the terminal can place and cancel orders for you. It cannot withdraw.
The builder code — 0.01% on orders routed through WatchCrypto, on top of Bulk's own fee. Like Hyperliquid's builder fee it is a cap you approve once; nothing is taken unless you trade. See how we make money.

Your wallet will describe this as signing a message rather than a transaction. That is expected and costs no SOL.

If the wallet approves the trading key but refuses the builder code, the terminal tells you exactly that rather than reporting a clean connection — you will still be able to trade.

Step 4 — Fund and trade

Send USDC on Solana to your Bulk account, then open any Bulk market in the terminal. The order form, your positions and your open orders appear in the trade dock, and your position and protective levels are drawn on the chart. The first-trade walkthrough applies here too.

Troubleshooting

"Sign in first"

Exactly what it says — Bulk attaches to an existing WatchCrypto account. Sign in, then connect.

"You cannot sign Solana transactions using sign message"

You should not see this any more; the terminal signs the message in a form Phantom accepts. If it appears, reload the page so the current build loads and try again.

"This wallet is the builder payout account itself"

A safeguard — an account cannot approve its own builder code. Connect a different wallet.

The signature was cancelled

Nothing happened; nothing was authorised. Start again whenever you like.

Hyperliquid too?

You can connect both venues to one account and switch between them. Here is the Hyperliquid guide, or the overview of every way in.

Connect Bulk with one signature.