Daily Open Line
The indicator draws the daily open line.
GMT shift (minutes)
The time zone could be shifted. The value is given in minutes.
Max bars for drawing
You can specify, how many candles should be used for draw the lines in the past.
Colors, Styles, Widths
You could easily set up the desired colors, styles and widths for the lines.
The indicator has two buffers, which are alternating day after day.