Yes! But it may take a bit longer.
We encourage users to set up their watches as early as possible, but we may not send you any notifications for a while. We don't want to bother you if we don't have any helpful information yet. Note that some airlines don't even set their schedules further than six or nine months in advance.
However, you will receive notifications from Hopper when your departure date draws closer and our forecasting becomes more relevant.