A Key Performance Indicator (KPI) is a visual cue that communicates the amount of progress made toward a measurable goal. For more about KPIs, see Key Performance Indicators (KPIs) in PowerPivot.
KPIs are a great choice:
To measure progress. Answers the question, "What am I ahead or behind on?"
To measure distance to a goal. Answers the question, "How far ahead or behind am I?"
This might help you with wht you are trying to accomplish: https://www.youtube.com/watch?v=QEIcz9hNVOw