Canada is one of the important oil exporters. The Canadian dollar is easily affected by the price trend of commodities (crude oil is one of them).

Crude oil prices are positively correlated with Canadian dollars. When crude oil generally rises, the Canadian dollar will also rise, but it will not rise like crude oil.

Note that Canadian dollars in the market are generally US dollars against Canadian dollars. If you are bullish on the Canadian dollar, you are bearish on the US dollar against the Canadian dollar. Don't do it backwards.