Expecting more downside on USD CAD once a retest of prev support

With the Fed Reserve looking like they are starting off the year quite Dovish on the economy, looks like we could see further downside on the USD - Some are mentioning they won't want a rate hike until middle of the year but the market seem to be pricing one in for March and they could be left disappointed in the run up causing them to withdraw positions and short the USD.
Inflation seems to be the main concern for the Fed
CAD was the top performer in H2 2017 and with continuous good data and Oil rallying, this could be the ideal currency to short the USD on.