Modular Stock Trading Bot

I need an end-to-end, desktop-based trading bot written in Python that I can grow over time without touching the core code. The build will be fully modular: • Scanner – pulls live data through my broker’s API, filters by ATR, pullback, RVOL, sector and overall market direction... (Budget: $250 - $750 USD, Jobs: API, C++ Programming, Data Analysis, Desktop Application, Documentation, PHP, Python, Risk Management, Software Architecture, Software Development)