Download the indicator here: http://thinkorswim.net/product/key-reversal-time-vertical-lines-indicator/
This indicator allows you to place reminders at specific times during the trading day by automatically drawing a vertical time level or line at a specified time. It can also notify you of key reversal times that you’re watching, daily margin call times, opens and closes.
Have a specific strategy you only want to trade before 11:00 a.m.? Put a reminder in your chart to stop trading it after 11:00. In addition to custom times, each time can have a custom label attached, as well as custom line weight, style, and color.
Find out more here: http://thinkorswim.net/product/key-reversal-time-vertical-lines-indicator/