Saint Cabbage

For example, in the attached, I would like to have everything after the "Current Time" line be dashed, as it hasnt occurred yet. You can do this in a regular Line graph, but seemingly not in a Spline...

Is there any way to plot markers by long/lat on maps, specifically state specific maps? I can geocode locations I would like to plot, but is there a way to coorlate the x/y coordinates to long/lat? Thankx!

Is there any way to display a Spline chart line with dashed lines as opposed to static? I notice it's not an option as with non-spline line charts. Is is something with the curving of the lines that prevents it from being a viable option? Thanks!