What is DEX?

A DEX, a decentralized exchange, is a venue where trades settle on a blockchain through smart contracts rather than through an intermediary that holds customer funds. You trade from your own wallet, the contract executes the swap, and the assets never leave your custody except for the instant of the exchange itself. There is no account to open, no deposit to make and no withdrawal to request; there is an address and a transaction.

Two designs dominate. Automated market makers such as Uniswap price trades against pooled liquidity by formula; anyone can add to the pool and earn fees. Order-book DEXes such as Hyperliquid and Lighter run a real book of bids and asks on-chain and match trades the way an exchange does, which is how perpetual futures came to trade on-chain with exchange-grade depth. Aggregators such as Jupiter route a swap across several venues for the best price.

The trade-offs are visible. A DEX gives self-custody and transparency: every trade is public and every position is tied to an address. It also exposes the user to slippage on thin pools, to front-running in the public mempool, and to the security of the contract itself. There is no support desk, and a mistaken transaction is final.

Because DEX activity is public data tied to an address, a tracker reads it without any credential. TrueHold reads swaps and positions from the addresses you paste, LP positions on AMMs by protocol, and perpetuals on Hyperliquid by address and on Lighter through a read-only token, and counts all of it next to your exchange accounts.

The best-known venues illustrate the range. Uniswap is the automated market maker most other AMMs copy; Jupiter aggregates Solana liquidity; Hyperliquid and Lighter run on-chain order books for perpetuals. All of them settle to an address you control, and all of them leave a public trail that a tracker can read without asking.