The two main influences on the FX market over the last few trading days have been the Irish situation and also tensions on the Korean Peninsula.
Any escalation in the Korean situation will lead to USD and CHF buying, as they are the traditionally safe-haven ports in times of geo-political uncertainty.
The US has said this morning that it is consulting with its allies on possible North Korean talks. The US has also called on China to urge North Korea to restrain its provocations and act responsibly.