when crude opens gap down, its below previous close. Then sell is there. Only SELL. If opens gap up, then buy only(watch 14th and 15th September 2015). He already said he's target was low as well as SL. Just back-test yourself if any one shows a new trading method. if it doesn't give you satisfaction just leave it.
What is there to back test there, where you dont have proper entry, just vague strategy that only draw a line at previous close.