SyntheticFi is a free Chrome add-on designed to enhance trading efficiency by acting as a robo advisor for box spreads in brokerage accounts. This tool simplifies the process of finding optimal box spread trades, allowing users to save time and significantly reduce margin interest. With just one click, users can potentially cut their margin interest by up to 50%, leveraging near-SOFR rates for trading.

The application automatically identifies the best box spread trades and pre-fills order details, requiring users only to verify the information and confirm the trade. SyntheticFi is compatible with most major brokerages, making it a versatile option for traders looking to optimize their trading strategies and minimize costs. For more information on interest rates, users can visit the provided link.