Draws a line plot of the value with upper and lower bands and option shading between the bands.
| Function Parameters | |
|---|---|
| Parameter | Description | 
| <value> | The value to plot. | 
| <topvalue> | The value of the top band to plot. | 
| <bottvalue> | The value of the bottom band to plot. | 
| <linewidth> | The width or thickness to draw the lines. | 
| <linecolor> | The color to fill between the bands. | 
| <fillcolor> | The color to fill between the bands. | 
| <fillopacity> | The opacity of the band fill. 100 is fully opaque, 0 is fully transparent. |