In this Video (#24 in Homework, Research, and Statistics series), we study the range of the 30 minute period prior to the session open and explore how often it's engulfed by the following day session as well as by the 1st 30 minute period of the day session. In our study, we learned that of the prior 1000 days (prior to 1/12/15), 77% of the time the the pre-30 bar was completely within the day session range. The pre-30 bar was completely within the 30 min bar of the day session 52% of the time.  Important Note: The results seen in the video were not accurate due to an error in the RTL syntax.  The chart definition has been replaced and the correct stats are listed above.