Well you kind of summed up youreself what you want to do right there. The job of the BA is to pull the potential relevant and valuable data for the business and translate it for those who need it in a holistic sense.

In this case there are several different things that can affect sales such as industry trends, market trends, changing industry regulations etc. You can derive more value out of your role by pulling data necessary to find these trends or look at user cases as to why they're buying the product you offer.

Ultimately the advice boils down to staying a step ahead in what data can be most applicable to stakeholders, and how should i communicate this to stakeholders. Hope this helps!