Crude oil prices have been moving in the 75 dollars to 83 dollars band in the last few weeks, with the flow of strong positive economic data from China, Australia and US. And indications from the US FED that there are more signs of a US economic rebound only helped the crude oil prices to remain strong.
Also in the last few weeks the US dollar has been weakening against most of the other currencies aiding the price strength. China growth figures have been very strong in the last few months which only has aided further strength to all the commodities including crude oil and gold.