DEX: a Decentralized Exchange

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Trading Without an Intermediary

A Decentralized Exchange (DEX) is a venue where users trade tokens directly through smart contracts without depositing funds with a central operator. You connect a self-custody wallet, sign a transaction, and the contract executes the swap atomically. No account, no KYC, no withdrawal queue—your tokens move from your wallet to your wallet on the same chain.

Most DEXs today are automated market makers: pricing comes from a formula applied to liquidity pools rather than from matching individual orders. Uniswap and PancakeSwap dominate the AMM landscape; Curve specializes in stable-asset trading; dYdX and GMX run on-chain perpetuals. Some DEXs use traditional order books with off-chain matching and on-chain settlement to keep gas costs manageable.

DEXs trade off some convenience for self-custody. Listings are permissionless—anyone can launch a token with a pool—so the universe of tradable assets is much larger than any centralized exchange. The flip side is exposure to scams, low-liquidity tokens, and front-running bots that exploit pending transactions. Aggregators like 1inch and Matcha route across many DEXs to find the best price for a given swap, often beating any single venue.