Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.
Q&A for work
Connect and share knowledge within a single location that is structured and easy to search.
I was thinking of implementing a column chart with two bars for each item displaying the current month and the previous month values.
Candle Stick bar charts with x-axis being time & y-axis being dollar would be a suitable graph.
Stock prices do it with high low bar. It is pretty much the standard practice from even before computers.
Required, but never shown