Tanya Goris

I recently purchased a 2010 Ford Fusion Hybrid, a little over 2 weeks ago so I'm still learning. I skimmed through the manual and read that the HVB gauge should be at the half way mark most of the time. I noticed about 4 days ago that the HVB gauge was and still is full (at or just below 'H'). Should I be concerned or is this normal? Appreciate any feedback.