multiple lines on a chart

[hello]

I have a line graph, and I wish to add a single line(eg. average line) to the graph. I know you can add another series, but I have to add an extra field with identical value to all my data points if i want to do it this way.
Is there a better way?

[MiamiCoder]

Don't waste cycles looking for an optimizing solution for this when a satisficing solution will do. You can always come back and optimize if needed.

[hello]

true, but if I emulate a straight line graph by many points of the same y value, how do I remove the points so it looks like a straight line.

[MiamiCoder]

You could use a transparent image as the data point, for example:

series: [{
 type: 'line',
 displayName: 'Movies',
 yField: 'movies',
 style: {
   color: 0xCCCCCC,
   image: Ext.BLANK_IMAGE_URL
 }
}]

[MiamiCoder]

Or, change the color, alpha, fillColor and fillAlpha to achieve transparency:

series: [{
  type: 'line',
  displayName: 'Average',
  yField: 'average',
  style: {
     color: 0xCCCCCC,
     alpha:0,
     fillColor: 0xCCCCCC, 
     fillAlpha:0
  }
}]