Here is an example using GoogleCharts to make a Gauge. It shows how to make a gauge display two ways, the second way shows a way to work with Google Charts Make an Analog Gauge and use it to display something useful . Reading it may help you understand how to use an html file. Read it along with the post Tim made regarding GoogleCharts ... the https://developers... link to see how to use dates along the x axis.. The two articles show you how you can possibly use GoogleCharts to display your graph the way you want. You will have to experiment. Only you know how you want your line graph to display.