I accumulate data for time vs. temperature, and would like to sum the times that the temperature is increasing - that is, if the temp in the next cell is greater than the current cell, show the time interval. Then at the end of a selected period, say when the date changes, sum the number of minutes that the temperature interval increased. I'm not sure of the correct formula to use.

The spreadsheet I have consists of 3 columns: date, time (minutes), and temperature - can attach a sample if this is not clear.

Thank you in advance.

Grov