No, not at this time. Currently the two charts (Source EUI and Total GHG Emissions) on the My Portfolio page are your only options. But, giving users the ability to customize their own charts on this page is on our list of future enhancements.
Also, if you have more than 1,000 properties, these graphs will not show. Because the graphs are generated real time, these graphs were causing performance issues for large portfolios. We are working on a longer term solution.