Clearly marked levels. For those who understand the importance of the opening and the type of day which can follow watch out for opening within the range, below the blue line but within range/outside range, within the three lines, blue, green and red and of course above the red line but within the range/ outside the range. Study the chart , the supports and resistance and how Nifty futures performs. best of learning. Check on previous charts of Bank Nifty futures and Nifty futures to understand and follow the accuracy of levels vis a vis the place of opening