Extreme risk Chart set used to show the area of the chart that represents extreme risk. See Also High risk Chart set used to show the area of the chart that represents high risk. See Also Medium risk Chart set used to show the area of the chart that represents medium risk. See Also Low risk Chart set used to show the area of the chart that represents low risk. See Also Negligible risk Chart set used to show the area of the chart that represents negligible risk. See Also