It seems like without fault oil will drift lower when the contract begins trading. By 7:00 PM is may be down 2/10 percent by 11:00 it is down 4/10 percent and by 7:00 AM it is down 1.0-1.3 percent. Then by 10:00-11:00 AM it goes higher. Every time I have observed oil it has done this. Only a handful of times does oil trade in positive territory when the US markets are closed. Is it always like this?