Click on the penultimate section in AliHelper if it is in compact form. Or on `Price Change' if it is in expanded form. The white color on the chart indicates slight price fluctuations, red indicates an increase, green indicates a decrease. Graphical display of price changes is an easy way to see past prices on Aliexpress, stay up to date with price changes of selected products and make profitable purchases. AliHelper - a handy and free extension for tracking prices on Aliexpress will help you.