Building a Trading Bot That Survives Its Own Failures
A trading bot is a distributed system that runs unattended against a live broker, so a crash, a duplicated message, or stale local position state each has a direct financial cost. This is how I engineered one to run all day under five reliability guarantees: idempotency, a single source of truth, bounded-cost orders, clock-aware failover, and self-monitoring that catches a silent break within minutes.