Managing Live Trading Data Streams in a React Dashboard

I’m building a web dashboard to track market movements and currency pairs in real time. I plan to use React for a clean UI with live charts and eventually add basic automated actions. My current challenge is deciding how to handle the data connection. Should I use WebSockets for true real-time updates, or can I rely on REST polling if I don’t need millisecond precision? I also need tips on managing frontend state when numbers update constantly and how to keep the architecture simple while avoiding performance bottlenecks. Any best practices or lessons learned from building financial or tracking apps would be appreciated. Thanks!

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