What best 3 pairs to trade for volatility/spread/correlation etc

wldman 

on usd/cad maybe swissy. Look at oil or gold as well then you can trade the risk on risk off trade. Spu is always fun as well...I only trade euro as that seems enough to focus on but the risk trade is always something to view. DB

I don't trade currencies as a rule, but if you are looking for short term, you might have a look at jpy/usd- gold, hours to days in trade duration.
Cheers John