In addition to scanning for upper and lower Price Channels, it is now possible to scan for the middle Price Channel. The middle Price Channel is simply the midpoint between the upper and lower Price Channels.
In the chart below, the middle Price Channel is represented by the blue dotted line:
In the Standard UI you can choose the middle Price Channel from the Indicators drop down list in the Additional Technical Expressions area:
In the Advanced UI, look under the Price, Volume, and Indicators drop down list:
For more information on Price Channels, see the article in ChartSchool here.