I'm very confused and I am not sure if I should take this chart serious.
Let's compare SW37N:
It is pretty head heavy according the chart. At least 4/5. This spec is stated if you navigate to the racket itself: HH○○●○○HL
that court looks like it was made by a high school kid.
actually, high school kids can probably do a more pleasing job.
Is there another way, besides the two dimensional chart, to compare rackets? I find no consistency with their rackets. Besides, what do heavy and light mean? If it is about head heaviness, why not replace with balance points? Rather useless endeavour.
maybe the chart is about the purpose of the racket as a whole package, so not only about the stiffness and head heaviness, but also about the frame design, shaft design, material tecnology etc. For example SW37 is less HH compare to MX80, but since they use different frame shape/ technology, SW37 will feel more HH compare to MX80, so good for smashing.