Back to investing platform, especially to futures markets, as you see, we will narrow the topic at crude oil futures. Joining into this trading floor, traders or investors need to keep track with changes both commodity futures prices in general and crude oil prices in particular, since markets are interactive to each other. However, because of the limited time, we will first of all check out the oil market. And here, "The Fundamentals Affecting on Changes in Crude Oil Prices."