Oil Backed Currency? CAD? AUD? NOK?

[twelves]

Holding long and loosing on NOK

Some currencies are backed by oil or highly tied to oil prices because of their oil independence and oil exports.

However I have noticed during a EUR sell off that it pushes down the value of the NOK. Is it because a flood of money rushes into USD?

Can one buy a currency based primarilly on the country's Oil exports?
Are other factors more relevant in dealing with oil exporting economies?

Thanks for your advice.