Point a finger at the loonie and you might as well point a finger at oil, but it's not all about that this time
Yes oil has briefly rebounded to positive territory, and yes USDCAD has fallen but the main driver being noted is selling in EURCAD above 1.5120. that has led to stops being hit through 1.5100 sending it down to 1.5020
EURCAD 15m chart
Cross flows are said to be dominating a lot of the moves today so look to those for working out what tail is wagging what dog