Yes, you can trial the Forecast feature with a 10-day free trial. As soon as you install Tymeshift, by default, Tymehsift will collect the historical data from your Zendesk account for the past 30 days in order to prepare a Forecast of inbound volume for the next 30 days.
Note: once you decide to subscribe with us, you can request us to collect up to 2 years of historical data to ensure Forecast is most accurate, just reach out to support@tymeshift.com.
You may want to check out additional articles about the Forecast Overview and Set up.