However, the euro is not quite the ruble. :) For the ruble, cheap oil means Russia's economic bust. For the euro, cheaper oil signals debt deflation / strong dollar. If we will see this series of 3-4-5 waves on the euro like in oil, I think the answer to my question is positive, but not for the euro. :D
Tom McClean noticed it by shifting the oil price with 3 weeks. (Google Crude Oil Leads the Euro)
Though, his oil-leading based prediction that euro will bottom on February 18th failed, whereas mine did not. :)
And then, I've seen this divergence possibly repeated on the euro.
However, in the intermediate term I suspect DXY to completed is current cycle and then at least make reasonable retracement which is when both Oil and EURUSD could form short term low if not reversal. IN that way I feel it is more beneficial to use correlation and potential divergence in related instruments.