1. A method comprising: monitoring an activity level with respect to queries submitted to an online marketplace over a certain time period to calculate an activity rate; determining, using one or more processors, that a predicted change in the activity rate has crossed a specified threshold rate, the determining including forecasting that the activity level measured during a first time period will transgress an average activity level by a selected amount within a second time period subsequent to the first time period; and displaying a landing page identifying at least one of items or item groups associated with the queries on a display based on the determining.