This is to help you shade 3 different time frames, its showing 3 different timeframes. This will help you determine if you are trading in the right time frame that you want to. It is set to default to Eastern time frame. the default setting are set for 1700-0100, 0100-0600 and 0600-1000. You can change the time frames to which ever you would like to trade. This helps the visual learners to recognize which time frame they are trading in.