There were some codes written for this purpose but with the new add-ons they are no longer applicable.
Thanks in advance, Iddo
I know that you are looking for an auto-refresh; perhaps some coming in here may be happy with a quick fix for a manual button (like the checkbox proposed above). I actually just stumbled upon a similar solution to the checkbox: select the cells you want to refresh, and then press CTRL and the "+" key. Seems to work in Office 365 v16; hope it works for others in need.