What is a DEX?
A decentralized exchange lets people swap tokens directly from their own wallets using smart contracts, without a company holding their funds. Uniswap, PancakeSwap and Raydium are the best-known examples.
Why DEX volume is useful
DEX volume shows how actively people trade on-chain. Spikes often come with new token launches and meme-coin seasons; long declines show cooling interest. The 30-day average smooths out daily noise.