DeFi crypto margin trading refers to the practice of using borrowed funds from a broker to trade a financial asset, which forms the collateral for the loan from the broker. Usually broker in DeFi it’s one of autonomous money markets.
DDEX is an advanced decentralized margin exchange. Users can create leveraged margin positions and earn interest through decentralized lending pools.
dYdX is a trading platform for crypto assets, built with open-source protocols, enabling decentralized margin trading. dYdX - Decentralized Platform for Advanced Financial Products, interview with Antonio Juliano
Fulcrum is the platform for tokenized margin lending and trading, enables users to lend assets for interest or enter into short/leveraged positions.