When Bar Graph graphs both positive and negative values graph does not show negative Y axis

[tcollette]

I'm trying to make a bar graph that resembles this one:

I'm not even worried about the line graph in the middle, I'm concerned about the fact that when I graph the bar graph using the config option scaleBeginAtZero: true , ChartJS doesn't take into account displaying a negative scale but just shows the negative bar graphs running off the page.

Any help or updates that would allow this would be fantastic.

[tcollette]

Duplicate of #669