Quick TakedYdX is a protocol for decentralized perpetual swaps. Initially launched in October 2018 on the Ethereum mainnet, the new version is live on StarkWare’s zk-Rollups.In the first month after its launch, dYdX facilitated $1 billion in trade volume and added markets for DeFi tokens such as UNI, YFI, AAVE and 1INCH.The advantage for dYdX is its scalability, but the difficulty will be in bootstrapping liquidity for long-tail markets and a lack of composability.