I am using the predict function to try to forecast out about an hour into the future for volume. In doing so it seems that the future predictions almost alternate between two different points. For example into the future would be 7, 3, 7, 3, 7, 3...., I would expect it to form a smoother line. I am using 6 weeks of data at a 15 minute span. Has anyone had issues with this before and know how to resolve this or what might be causing it?