Of a varying quantity in a specific time interval. The maximum numerical value attained whether positive or negative.
"Christmas came a little late this year but sure was worth it. I had thought that I had lost this concert disc forever as my laser disc player gave up the ghost and I did not want to repair it. I had checked to see if this concert had been released on dvd but it had not and no plans to, a new vhs tape of it would have cost $100. I found CVC on ..."