I could use a feature that allows me to have vertical line or lines appear on the chart at a specific times everyday. For example I'd like a line to appear on the S&P 500 at 11:30 AM and 3:00 AM each day. In this case the lines would appear on the chart everyday at those times historically. Id like to be able to choose different times to make these marks for various markets. Let's call this concept a "Mark to Market line".