I assume you know this since you used PT4 but adding it here for reference:
HM3 does not have positional versions of every HUD stat like HM2 did, as many customers felt it cluttered up the stats list. Instead we have the HUD - HUD Editor - Item Properties - Position modifier.
I just checked the PT4 HUD Editor and do not see a position item property for HJ either. Were you using a custom stat for it in PT4?
HM3 only has 6max position item properties at this time but we have a feature request to add 9max positions, and an 'All positions except BB' filter.
These feature requests have been documented in detail and provided to the developers for future consideration. If you want to be notified if/when they are added please send an email via the 'Contact Support' link and include "Notify Me When HMT-3140 and HMT-5793 Are Resolved" in the subject line and body of the email.
Regards,
Fozzy71
Customer Support
Hold'em Manager