I have three fields date, low, high. I need to calculate the midpoint
of low and high and display it.
Date,Low,High
20071106,92.03,92.13
20071106,88.77,88.87
20071106,90.20,90.30
20071106,95.21,95.31
20071106,93.13,93.23
20071106,91.01,91.11