Access to System.Drawing.Graphics gives a possibilityto draw tooltips, flags and lots of other things on the chart.Colors and appearance can be set up depending on the event importance.
This indicator shows a past and upcoming economic events on the chart. We have taken the forexfactory news feed as the news data source (hope they don't mind).
You can set up colors and appearance, depending on the event importance.
Customize to fit your favorite color scheme