ggplot2 Package
The autoplot.zoo() function in the zoo package provides an easy-to-use interface
to the very powerful ggplot2 package which provides a plotting system for R
based on the grammar of graphics.
> library(ggplot2)
>
> autoplot.zoo(bmw_2014_xts, main = "BMW OHLC plot with ggplot2") + xlab("")

We see that the scaling on the y axis is not correct.
We use the facet_free() function to allow for different scales on the multiple y axis.
> autoplot.zoo(bmw_2014_xts,
+ main = "BMW OHLC plot with ggplot2",
+ facets = NULL) + xlab("") + facet_free()
