Under the tab Logs (main menu item "More"), you will find two reports related to the published rates. 

Published Rate Timeline

In this log, you can find an overview of the published rates. Each row displays information about the individual who published the rates, the date range during which the rates were published, and the modified rates. By clicking on the modified rates, you can view a summary of the old rates, new rates, old minimum length of stay, and new minimum length of stay. The "Result" field indicates whether the rate was manually published or auto-published using the Auto Publish feature.

Rate History by Arrival Date 

This log presents the rate history for a specific date. You can select the desired date for which you want to view the history using the grey bar. Once the date is selected, the historical rates will be displayed, including the date of changes, the person responsible for the rate modification, and the minimum length of stay.