O.I. = Open Interests
Prv O.I. = Open Interests of the previous trading day
O.I.Chg = O.I. different between current trading day and the previous trading day.
Vol. = Volume
Prv Vol. = Volume of the previous trading day
Vol.Chg = Volume different between current trading day and the previous trading day.
Range = Price Range Chart
P/C = Put-Call Ratio
Current Month = Values Sum of the Current Month of the corresponding column.
All Months = Values Sum of All Months of the corresponding column.