Explore the architecture of a high-frequency trading application built on Rails, demonstrating its scalability and ability to manage complex communications. Learn how to connect to the New York Stock Exchange server using TCP and implement Remote Procedure Calls (RPC) with RabbitMQ for transactional messaging. Discover techniques for delivering large volumes of updates through WebSocket Secure (WSS) while maintaining solid transactions via HTTPS. Gain insights into the key components of such a system, including connecting to the exchange, sending messages, and handling transactions, all within the context of recent events in the financial technology sector.