Bar Chart: Color of Grid Lines and distribution of categories

[Joscha]

Hello everybody,

I'm customizing the bar chart viz using the vizualisation customizer. I have two problems that I couldn't solve:

1)  assign different colors to specific grid lines: my x-Axis goes from min: -2,5 to max: 2,5 (I need exactly this span, so I set "local":"false"). Now I want the grid lines at -0.5 and 0.5 to be yellow and at -1.5 and 1.5 to be red. Is this possible? (see attached jpg)

2) I want to filter the vizualisation in my active report, and depending on the filtering, there will be a different set of categories/bars. The bars are always evenly distributed across the height of the vizualisation, but I need them to be aligned on top (with a fixed gap). Same question: does anybody know how this can be done? (See jpg)

Thanks alot!

[Joscha]

...find the vizualization attached: