Above the column which "indicates the proportion of the total amount matched which has been matched at this price. The amount displayed is the amount traded at this price. You can turn off this display in the program preferences." , there is a number in Red or Green which is not mentioned in the User Guide. What does that number mean / indicate ?
It's the average price matched based on volume matched at each price. If it's value is equal to the last price matched then it's blue, green if greater and red if lower.