What Is a Decentralized Exchange (DEX)?

A decentralized exchange lets users trade directly from their own wallets through smart contracts, without depositing funds with a company. You keep custody of your assets until the moment a trade settles, and there is no account to be frozen or withdrawal to be approved.

That custody difference is the entire point. On a centralised exchange your balance is an entry in a company's database and an IOU against their solvency — a lesson delivered expensively by FTX, Mt. Gox and Celsius. On a DEX, funds sit in your wallet or in a contract whose rules are public and cannot be quietly changed.

DEXs come in two architectures. AMM-based venues like Uniswap price trades from liquidity pools using a formula. Order book venues like Hyperliquid run a full matching engine on-chain, which behaves much more like a centralised exchange and supports limit orders, stops and proper perpetuals.

The trade-offs are genuine. DEXs offer self-custody, permissionless listing and transparent on-chain activity. They also expose you to smart contract risk, require you to manage your own keys with no password reset, and historically offered thinner liquidity — though order-book DEXs have narrowed that gap substantially.

The transparency has an underappreciated side effect: because positions settle on-chain, anyone can inspect any trader's history. That is what makes tools like this site possible — you can look up any Hyperliquid wallet's realised PnL, win rate and open positions without permission from anyone, which is simply not possible on a centralised venue.