As a member, you can now access (by Log-In) both the pitchers' ADIs and the hitters' VMIs for today's games and tomorrow's games.  If you are not a member you will see only yesterday's games.  The ADI affects the ball movement; therefore, the pitcher's accuracy via the strike percentage and location within the strike zone.  The hitter's VMIs are representative of how familiar the hitter is with the movement the pitcher will have in today's or tomorrow's games.