I wanted to scroll a table precisely to do some data collection. Here i can't use Arrow Down Key to scroll because it is not precise. Here is an example table:

I was thinking to scroll it using vertical slider and use image recognition make it precise.
What if we capture the Image from Blue Color Box and scroll the table by one step coordinate (y-axis) using MouseMove and check that image same image in Red Color Box, and repeat the loop until the image will be found inside the red box.

Here i cant fix the coordinates in MouseMove because the number of rows are keep on changing in the table so one time it works but other time the script break down.
Is the above method possible to scroll or is there any better alternative for that?
Thanks!
Regards,
Ushahra