As a developer building trading systems, real‑time precious metals data has caused me more pain than any other feature. After 3 painful margin calls from delayed ticks, dropped connections, and uncleaned data, I rebuilt my entire pipeline to be bulletproof. This is my story + full production‑ready code you can copy/paste today. Why Precious Metals Data Breaks Your Strategy Stocks & futures have fixed hours. Precious metals trade 24/7 across 4 global markets: London, New York, Hong Kong, Sydney. Common failures: HTTP polling can’t keep up with news spikes WebSocket disconnects without recovery Duplicate/absurd prices break your strategy Single-symbol subscriptions blind you to correlation I learned every lesson the expensive way.…