fnord_app.rb

# event data: { :_type => :set_metrics, :total_people_count => 23000000 }

gauge :total_people_count_day,
      :tick => 1.day,
      :title => "Active count"

event :set_metrics do
  set_value :total_people_count_day, data[:total_people_count] 
end

widget 'Totals', {
  :title => "Total counts",
  :type => :numbers,
  :gauges => [:total_people_count_day, :total_invite_count_day],
  :include_current => true
}