The Core Trading Mechanism is the essential framework that enables users to trade cryptocurrencies on decentralized exchanges (DEXs). It encompasses different trading models, including order book systems, where buyers and sellers place orders that are matched, and automated market makers (AMMs), which use liquidity pools to facilitate trades without the need for traditional order matching. This feature is crucial for ensuring liquidity, price discovery, and efficient trading experiences in a decentralized environment, allowing users to trade directly from their wallets without intermediaries.