Im new to holdem manager, how can I boost my hand database so the hud is usefull.
It's useful everytime you play. Don't put there stats that'll take 1000 hands to converge.
vpip and pfr are the most important stats imo, and start to take shape with only ~ 15-20 hands. They usually tell you a lot about the persons postflop play too.
This pop up window that gives the visual representation of villains range based on their PFR %...is this something custom you have made or something HEM offers.