Whole game
How many people are playing DayZ
The public directory publishes a running player total for DayZ.
This is the player count for DayZ as a whole, not for one server. The number is the directory's current total: people on servers it can see, and the count of those servers. The chart is the recent history of that total. It moves with the European evening and again with the Americas.
A single server's week is on its dossier. The chart there is that machine only.