CoFiX is a decentralized trading protocol (CoFi+DEX=CoFiX) based on the NEST oracle design. It consists of an oracle module, a market-making module, and a trading module. The name "CoFi" is derived from Computable Finance. Unlike traditional DeFi, CoFiX addresses not only credit and liquidity risks but also volatility risks. By effectively calculating risks and using algorithms to price and manage them, CoFiX aims to achieve true non-custodial and automated operation. It is a blockchain-based closed-loop application that will revolutionize the financial industry.