Introduction - Open High Low Scanner for Nifty Scrips Open high Low Scanner is a technique used to filter out scrips that have open=high or open=low. The strategy says that if open=high, one should go short in that scrip and when open=low, one should go long in that scrip. You can apply any calculator to find buy or sell levels. Future and Options (F&O) STOCKS SCANNER. Hi, I kindly request you to build the scanner as given below: I want those stocks which traded in "consolidation" (mean, traded all the day in single line which can be drawn with in a horizontal box), so that i can trade next day either high of the previous day or low of the previous day.