
This would have the most application with HP tracking but I could see other uses.
If a bar gets under or over a number apply a condition tracker.
Example (in d&d 4E)
The sipalist would be when HP<half HP (would most likely need to set the number) add the red dot.
I would also like to see the ability to set more than one to a bar.
Example (in d&d 3.5/pathfinder)
I use the turn bloodied in these additions as well to cut down on stat quoting. (ut the players decide when they are bloodied not necessarily at half HP)
HP<=half add red dot
HP<0 add black dot (dyeing)
HP< -CON add red X (dead)
This would also play into another post of mine “Player modified HP” making less work on the DM in that case by letting players know when something is bloodied or dead. No need to ask the DM.