need help with a line graph

Hi everyone im new to developing reports. What i am using is the Reporting Services and I want to make a line graph that will update every 5 minutes. What the data shows are the temperatures of a furnace which is a constant value that will be written to the graph, and also it reads the soak time where the temperature stops raising.. so the line graph I need is have one line.. it goes from 0 to 100 stops at 100 for an amount of time (the line graph will flatten out at the value it started soaking at) then it will increase in temperature again and soak again so it will look like steps on an incline. i hope this makes sense it's hard to explain but if there are any advanced chart controls out their let me know please and thank you