Automated Multi Account Trade Copier

I want every action I take on my master trading account automatically replicated to four-to-ten linked accounts on the same platform. The API supplied by the broker is fully accessible, so the copier can subscribe to trade events and push identical instructions in real time.

The system must mirror these three actions without fail: open trades, place orders, and close trades. Low latency and absolute accuracy are essential because a delay of even a few seconds can change pricing. I am happy for you to choose the most appropriate language or framework—Python, C++, C#, or others—as long as the final build runs reliably on a standard VPS and is easy for me to maintain.

Deliverables
• Well-structured, documented source code
• Configuration file where I can add or remove target account IDs at will
• Simple log or dashboard that confirms every replicated action and flags any API errors

If it helps your estimate, I intend to start with four secondary accounts but may grow to ten, so the architecture should scale smoothly. Please outline the approach you’d take, the estimated development timeframe, and a cost breakdown by milestone so I can budget accordingly.