What are the data flow diagrams of online trading system?

Data flow diagrams (DFDs) of an online trading system illustrate how data moves within the system, highlighting processes, data stores, and external entities. Typically, a high-level DFD would show major components like users (traders), the trading platform, and financial institutions, demonstrating how orders and transactions are processed. Lower-level DFDs can break down specific functions, such as order placement, payment processing, and portfolio management, detailing the flow of data between each component. Overall, DFDs help in visualizing the system's functionality and identifying potential areas for improvement.