HKD/USD conversion rate by date shows the date and day based historical data with percentage change (increase or decrease), highest and lowest rate in last 7 days, 10 days, 30 days & 3 months is the useful information for currency traders, exporters, importers, tourists, HKD USD currency exchange rate chart / historical data. HKD USD currency exchange rate chart / historical data. HKD/USD Currency Exchange Rate Chart / Historical Data. Get free historical data for HKD USD (Hong Kong Dollar US Dollar). You'll find the closing price, open, high, low, change and %change of the currency pair for the selected range of dates. The data can be viewed in daily, weekly or monthly time intervals.