Korea Premium
Domestic KRW ÷ (global USDT × USDT/USD × USD/KRW) - 1. USDT keeps its own premium instead of becoming the conversion baseline. Non-USDT assets require current active SPOT quotes from at least two independent overseas exchanges that agree within the consensus guard; the median of the agreeing prices becomes the reference. Single-source and disputed symbols are withheld from the scanner.