It would be great if was possible to trace "inner-outer" lines with reference to Andrews' pitchfork.

Call them "internal" or "external" retracement, as you like it. But I would appreciate to plot a couple of lines equally far from the median line and the outer line of the pitchfork (a 50% internal line), or plotted at 61.8% the travel among the two lines (or another adjustable percentage). Equally, I would like to plot outer lines whose distance from the pitchfork is the same as the distance from the outer line to the median line.

Hope to have been clear enuf...