WhaleEx is the decentralized exchange (DEX) based on EOS, aiming to be the top DEX with the highest liquidity all over the world. The WhaleEx team has the strong belief that only the DEX can ensure the security of users' assets. WhaleEx also has self-developed off-chain trade matching engine being capable of handling millions TPS in real time. Besides, WhaleEx is the first decentralized exchange that supports repo trade mining. WhaleEx fully contributes itself to prospering the EOS ecosystem, providing services for Dapps and users within the ecosystem. The EOS World Tour initiated by WhaleEx has been supported by fifty-nine BPs around the world.