Zig Zag: implementation?

[Bigape]

Re: How to use ZigZag [advanced]

Thanks for the wonderful post, although not very recent: I learned a lot of things thanks to the various interventions; very technical and professional.
I wanted to ask how I could implement an additional block that calculates (in Pips) the distance between uh Hd and a Ld of the swing format (previous), with the possibility of plotting the value on the graph.
Thanks to those who will give me some ideas.