To make this study work you will need to have a CSV file available or create one yourself. It could be that someone you follow is providing these levels in a csv file or you manually keep track of levels that are interesting for you in a separate csv file. In my next post I will go into detail about a study that is already available on my gumroad page. That new study will create the csv file automatically based on either horizontal rays or extended rectangles being drawn on the chart.