This tool is provided as it is. "Fav Search" records are saved on your device's local storage. The server does not save those data. If the "Fav search" records are gone on your device, go cry in a corner and Iduncare lewl. ¯\_(ツ)_/¯
It links Kayak's flight route pages to show the price trend (monthly average and average as travel date approaches). The price trend should only be used for reference. There are may be better price available depending on your travel date and airline preference.
Airport list is provided by Ourairports.com. Appox top 1000 airports are used in this tool.