This indicator draws two lines on your chart. This lines represent the high and the low of a customizable time range (Opening Range). The strategy: you should trade in the direction of the breakout.

Mostly the opening range is between 8:00 and 9:00

Example:

• DAX/GER30/(German Index) -> From 8:00 to 9:15
• EUR/USD (German Timezone) -> From 7:00 to 9:00

You could use a Moving Average as a filter for the breakouts.