There IS zero correlation between "Crude Oil / Natural Gas"
Many a trader and a firm has been crushed on this spread. I can attest to this first hand. This psuedo spread holds it relationship until a six sima event occurs like a hurricane and it explodes/implodes.
Soymeal, Soyoil and soybeans are directly related like crude,gasoling and heating oil. Comparing them to natty.crude is erroneous.