see title
Hi Alex,
The 1.63 is the hedge ratio or the relationship between two instruments.
To calculate that, you can run a linear regression and fit a line to it. The slope of the line is the hedge ratio or regression beta or 1.63.
You can refer to this unit for more details: https://quantra.quantinsti.com/startCourseDetails?cid=55§ion_no=2&unit_no=6#course_type=paid&unit_type=Video
Thanks