Is there a way to control the category values instead of having them auto populated, i can put in place holder percentiles however when my clients values come through it plots them with their own grid line see below. 

I have attempted to edit the source of the pbl and changed some settings around minimum and maximum value ont he category but this never seem to update the graph, am i missing some setting ? 

 category.maximumvalue="0"  category.minimumvalue="0"