Margin trading is a type of advanced cryptocurrency trading system where the trader borrows money from the trading platform and trades with the borrowed money. This means, the trader’s loss or profit increases proportionally.
This is generally utilized by expert traders who are confident about their trades. General traders are recommended not to margin trade with large amount of assets. Learn more about margin trade here.
Decentralized margin trading allows general consumers to set margin positions on chain using complex smart contracts. I am aware of a few smart contracts that have this feature. For example, the two platforms I mentioned below have the feature.
Nuo Network - https://www.nuo.network/
Fulcrum by bZx - https://fulcrum.trade/