hello, actually my excel sheet is linked with a program in which there is a cell contains value which changes in every second for example-if at 10.00.01 a1 is 0 then at 10.00.02 a1 will be 6, at 10.00.03 a1 will be 8, at 10.00.04 will be 17, at 10.00.04 will be 22 or any other value, so my question is to find the different between the values in cell a1 which is to be displayed in cell b1


here is the example ---

in sheet 1 cell a1

at 10.00.01
a1 b1
0 0

at 10.00.02
a1 b1
6 6

at 10.00.03
a1 b1
8 2

at 10.00.04
a1 b1
17 9

at 10.00.05
a1 b1
22 5

and it continues changing in every second