I need a lightweight Windows desktop application that lets me track and trade the Nifty index through a clean, manual interface. The single-most important element is a real-time market data display fed directly from the NSE—no delays, no aggregation. Once the data is streaming, I want the screen to focus on price, volume and depth so I can make fast, informed decisions and place my orders through my existing broker platform. Key points you should know: • Platform: Windows 10/11, standalone installer. • Data source: Native NSE feed or a reliable NSE-approved API of your choice; latency and accuracy will be tested. • Core view: Live tick chart, current bid/ask, day high-low • UX: Keyboard shortcuts and a minimal, clutter-free layout—speed matters more than fancy graphics. Deliverables 1. Compiled .exe with installer. 2. Full, well-commented source code. 3. Quick start guide covering API keys, installation and basic usage. The build can be in C#, Electron + Node, or Python (PySide/PyQt) as long as it remains responsive; choose the stack you’re fastest with but confirm you can meet the real-time requirement. Once the proof-of-concept is stable we can look at adding order-entry and advanced charting in a follow-up phase.