The dollar was mostly flat ahead of a meeting of G7 central bankers and finance ministers over the weekend.
The dollar index was off 0.04% at 99.49 at 03:00 ET.
Observers noted the trade deal between the U.S. and China in 10 areas such as U.S. beef and credit card firms.
The dollar was given a brief boost Thursday by upbeat U.S. data but later trimmed gains.
The market continues to digest the implication's of Trump's sacking of FBI chief Comey for his economic agenda.
The dollar remains supported by expectations of further U.S. tightening this year.
Investing.com's Fed Rate Monitor Tool shows the odds of a June hike at 74%.
The pound steadied below $1.29 after losses the previous session when the BoE left policy on hold.
The yen was mostly steady against the dollar above the 113 mark.
The euro edged higher but remained below $1.09 as the outlook for the euro-zone economy improves.