If you had always trouble to understand the colors of the price-arrows, here comes the explanation.
Gold:
A golden arrow on the price always points down and means that this item has reached the absolute lowest price for the very first time and we call that “best price”. It is definitely worth buying if you are interested in the item. The golden arrow is always something special and it’s worth to pay attention these items. Should an item become just as cheap again later, the arrow turns green.
Green:
A green arrow means that the price has dropped. You can click on the item to get to the detail page. At the bottom of the page, you can see the price history and whether the item has reached the lowest price again or is only slightly cheaper. The colors of the boxes with the prices and the corresponding date when the price was changed have the same meaning as the colors of the arrows.
Red:
A red arrow means that the price has increased again. In this case, we recommend not to buy, but rather to wait until the item is back on sale.
Grey:
The first price an item came up to iTunes and CheapCharts. From that point, the price goes up and down.