There is some merit to Graphology, unfortunately it has never been studied thoroughly. There are graphologists who do testify in court. I associate certain types of handwriting with certain types of personality, and I’m usually right.
I had a cousin who would entertain in Catskills hotels doing her graphology shtick. When she visited Israel in the early ’60s, she wrote a letter to David Ben Gurion and offered to interpret his handwriting. Indeed, Ben Gurion replied and she did do a reading for him. At least, that’s the story she told me.