automatic color change on a cell

can it be possible for a cell to change color automatically, if i haven't touch the cell in a while?

for example:

if i have a list of prices for reference, can a cell color change to red if i didn't modify the price in, let's say, a month? i need it because prices change from month to month, due to inflation.

thank you in advance to anyone who answers. i hope it's clear, english isn't my firt language.