Scatter Chart
Scatter charts plot performance against risk. There are two types of scatter available; a static scatter chart which will create a static image of a chart including a performance and volatility table of instruments in your active list and an interactive scatter chart which allows greater manipulation of the chart and ability to plot more instruments.
Reading a scatter chart is simple. The chart shows volatility (risk) along the x axis and performance (returns) along the y axis. Therefore you want your instruments to be at the top-left of the chart (low = low risk and top = high returns).