A      B
  79.98  80.02
  80.04  79.94
  80.02  79.98
  80.04  79.97
  80.03  79.97
  80.03  80.03
  80.04  79.95
  79.97  79.97
  80.05      *
  80.03      *
  80.02      *
  80.00      *
  80.02      *