Risk on/risk off works well with different currencies besides EUR/USD. The Pound, Kiwi and Aussie also function the same manner.
When markets are risk on, basically everything priced in dollars that isn't a sanctuary when things are bad (gold, treasuries, Yen) go up, so expect to see oil and a number of other commodities grow as well.
I just trade USD/JPY in risk off markets because although the Yen is a harbor, awarded Japan's large current account surplus, the dollar can proceed wither manner when things are going well.
The loonie is regarded as a commodity (oil) currency but to me it is a dollar play on risk. That is the reason why we saw oil increase over 2% on Tuesday despite of all of the recent reports on more and more supply coming into the market with the U.S. expected to reach 11M bbls/day of output by the end of the year.