Custom Excel 2007 Spreadsheet - Website Data Scraper

I have a custom Excel 2007 spreadsheet that when I click a button within the spreadsheet, it goes to a certain website and grabs the title of products, its price, and its current stock, and updates those into the spreadsheet. Its buggy but overall it does what I need it to do. But there is one critical feature I need to add. When the stock or price changes, I need either the cell or the font to flash or change colors, or something to alert my attention to the change. Right now when I check for price changes, for instance, I have to look very closely at the entries to see if I notice a sudden change to the numbers to see if there has been a price change. What Im trying to achieve here is a highlighting of the change so I dont have to stare so closely at the spreadsheet. Once the field highlights or the font changes color, it can stay that color until I change it back to the default black. Hopefully that makes sense.