It’s difficult to say which currency is leading the way as it looks more like a general case of USD-longs taking profit or having trailing stops triggered.
Next short-term technical levels to watch out for are: Resistance at 1.3570 in EUR/USD, 1.6070 in cable, and 1.0070 in the AUD/USD; support in USD/JPY at 82.80 and in USD/CHF at .9690.