I need a low-latency crypto-futures companion that lets me specify exactly how much of my balance I am willing to risk, then sizes and fires the order in real-time—no more, no less. Primary exchange focus is Mexc, with Bybit and Binance immediately after (xbt support can follow the same interface). The bot can run as a lightweight desktop app or CLI, I am happy with Python, Node, or Rust under the hood as long as it speaks each exchange’s REST & WebSocket API and keeps execution times under 200 ms. Core workflow • I enter the trading pair, my stop-loss price, and the % of balance of my account I want to risk. • The tool pulls the live mark/last price, calculates the exact position size, and places either a market or limit order (my choice each time). • If price hits the stop level the loss never exceeds the preset percentage. • Hotkeys (or programmable buttons) let me launch, close, or flip positions instantly and long or short • Partial-profit targets are set as percentages of the full position and execute automatically while the remainder stays protected by the original stop. Deliverables & acceptance - Source code plus a small compiled/packaged build I can run on Windows 10 or macOS. - Exchange connectors for Mexc, Bybit, and Binance that pass live trade tests. - Position-sizing math validated with a sample account so risk is capped to the penny. - End-to-end latency benchmark (100–200 ms) demonstrated in logs or screen capture. - Simple config file or GUI for hotkeys, profit targets, and default risk %. - README covering setup, API-key handling, and extensibility notes for xbt. Timeline: ASAP—please outline how quickly you can hit an MVP that covers Mexc with market & limit functionality, then roll out the other exchanges.