@kijijij
EtherDelta was first project that allowed token exchanges on Ethereum. 0x then came up with smart strategy to use hashing, v,r,s signature verification to transact tokens onchain. I end up building a Wallet App on Android / iOS for users to trade directly on 0x Smart Contracts.
Institutions and Users can help themselves with Matcha API ( @matchaxyz ) to build their DEX Portfolio. Looking forward to the growth of DeFi.