Natural Hour Bars
Natural Hour Bars are based on a pseudo session start time of midnight (0:00) and are used to create predictable interval alignment regardless of a symbols actual session start time.
For example, using Natural Hour bars on a multi-data chart with 15-minute bars for a bond symbol (session open of 8:20AM) and a stock symbol (session open of 9:30AM) will always plot the bar close on 15 minute intervals within each hour (ie. 9:00, 9:15, 9:30, 9:45) for each symbol.