One of the most popular Xscape shows of 2018 was Friday January 5th at Oakland Arena. Interest for that show peaked in the month leading up to the event and ticket prices declined during that time.
Across all Xscape shows in 2018, interest was strongest right when the shows were announced and tickets went on sale. Meanwhile, ticket prices typically fell about 15 - 20% from the date a show was announced until the days leading up to the show.