Add note about min/max calculations being based on entire dataset
Add note about min/max calculations being based on entire dataset

pingjiang/flot,PiRSquared17/flot,xsongx/flot,xsongx/flot,bilaridis/flot,faheem801/flot,PiRSquared17/flot,bilaridis/flot,faheem801/flot,pingjiang/flot,edisona/flot,edisona/flot