I have stopped updating the prices on the website from now on. Instead, I have a link to the Runescape Grand Exchange website. I have chosen this because you will get to see the lowest, store, and highest price of the item. They also show a nice graph that will show you the price increase or decrease. You can make the graph into a 30, 90, or 180 day graph. The Runescape Grand Exchange updates whenever the price updates, so whenever you want to check, just click on the link and you'll get the most updated price.