Precious metals trade globally, but investors want prices in their local currency. Converting metal prices requires understanding spot exchange rates and keeping data synchronized.
Base Currency and Conversion
Gold is typically quoted in US dollars per troy ounce on global exchanges. To display in other currencies, multiply the USD price by the current exchange rate. Example: Gold at $2,000 USD × 0.85 EUR/USD = €1,700 EUR per troy ounce. Use real-time forex rates updated at least hourly. Stale exchange rates create arbitrage opportunities and inaccurate pricing.
Keeping Prices Synchronized
Metal prices and forex rates update independently. When displaying multi-currency prices, timestamp both the metal price and exchange rate. If gold price is from 10:00 but EUR rate is from 09:00, prices may be slightly off. Ideally, fetch metal price and forex rates together, or indicate "price as of [timestamp]" to maintain transparency.