I was hoping someone could explain this to me: On the CBOT's website I was looking at a daily chart of OU6. This meant that the month was set to Sep and the year was set to 2006. However, if you change the month to All and year to - the chart looks much different and instead of saying OU6 on the chart, it says %O. What is the difference, and what should I consider when putting on a trade? Thanks in advance.