Improve energy consumption line

Energy consumption is depicted as a line graph for last 10, 25, 50km. Nevertheless, it is difficult to use it for learning efficient driving. Why? Example: Assume 230km/h 10km ago and stopping now. Best result although inefficient. Improvement: Substract m*v*a from any depicted point of the graph. You will be surprised about the results, and using this, you can easily learn how to really drive efficiently. A further improvement would be removing also height energy.