Calculate the average profit per day/ticker (each record) and then report all day/ticker records which are three times (or more) higher than the...

Calculate the average profit per day/ticker (each record) and

then report all day/ticker records which are three times (or more)

higher than the average. Only count profitable records --

ignore day/ticker events which result in a loss or break even.

Note that you will have to make two passes through the data,

which means you will have to keep at least some of the data in memory.

FOR EXAMPLE: