Custom Stock Market Software Solution

I want to build a bespoke stock-market application from the ground up. The core vision is a single, streamlined tool that can pull live market data, analyse it intelligently and present the results in an intuitive interface. I’m open to your suggestions on the exact feature mix—whether that means real-time feeds, automated order execution, portfolio tracking, rich charting, or a combination that you believe will give everyday traders an edge. Cross-platform compatibility is important to me. If you can deliver a clean build that runs smoothly on Windows, macOS and Linux, that would be ideal; if you specialise in a narrower range, let me know what you can support and how you plan to handle portability. Your code should be well structured, properly documented and ready for future expansion. I value maintainability and clear separation between data ingestion, business logic and visualisation layers. A modern tech stack is preferred—Python, JavaScript (with Electron or similar), or another robust solution you can justify. If you have experience integrating broker APIs, WebSocket data streams, or advanced visualisation libraries such as D3.js, Plotly, or TradingView, please highlight it. Deliverables will include: • A working prototype that demonstrates the agreed core functions • All source code, cleanly commented and version-controlled • A brief user guide and a hand-off session to walk me through deployment and day-to-day use When you respond, outline the approach you’d take, the toolset you favour, and an estimated timeline for a first milestone. I’m ready to get started as soon as we align on scope.