Spark is a decentralized exchange built on the Fuel Network, designed to provide a comprehensive suite of DeFi services. It features an on-chain central limit order book (CLOB) that supports high transaction throughput and optimized fees, enhancing liquidity and trading capabilities across various cryptocurrencies. The platform incorporates a risk engine, and insurance fund, and supports up to 50x leverage for trading, with USDC as the primary form of collateral. Additionally, SPRK promotes active participation from market makers through incentivization programs.