Wind Speed Graph

I am a bit confused by the wind speed graph. I do not understand the use of various colors in the graph. What do the various colors represent?

Hi
there is a gust line, and a average line, and a low speed (for the minute )line
i used to have that on the old graphing system…

the number that changes when you move the cursor over the graph is actualy the gust speed…

(highest gust for that minute)
i actualy just set it to be blocked in (and then set the colour to suit)…
see under setup, graph setup