This map provides fast information about risk and possible yields. Yield is a the average weekly percentage return while Risk is a standard deviation of percentage weekly returns. On the X axis risk is presented and on Y axis - yield. Thus in the upper part of the map we have got symbols with giving best yield, with risk increasing from left to right side of the map.
Selected symbol is marked with a different color, and you can zoom the part of the map by pressing left mouse button and marking rectangle to zoom in.