I am trying to create a data series chart to show 'Story progress per iteration'. In this chart i have a black line which shows the complete scope of the project. This black line goes up when the scope incerases. I want to have this black line go down if the scope reduces which I am unable to do. Please help!!
Also I want see the projected end date/iteration based on the velocity of the team. I can do that calculation but how should i show that grphically.
Below is the image of the data series chart i am working on -