If a user specifies a number of x-axis values to be displayed instead of their actual values, the plugin should intelligently create x-axis values and labels based on the range of data being used.

Allow users to disable hover tooltips.

Allow a user to call a function with parameters to add a new bar.

When you hover over a bar, they should darken and maybe get slightly larger instead of simply having a black outline around them.

You should be able to specify multiple x values and it should stack bars on top of one another with different colors.

Non core features that would be nice to have as options

Allow an option to show the value of each bar to its immediate right.

X-axis is formatted poorly. Should be centered.

User should be able to specify a new value for a bar and have it resize to that value.

User should be able to specify a bar (by order number probably) and remove that bar from the graph.

the x-axis labels are not aligned unless they are exactly 3 characters. They should align with the tick marks that are generated above them.