The March bear candle, which broke below the February outside candle, touched the rising 20 weighted (among other things) and formed a small lower tail.
I have not explored the script very much. I haven't published the scripts because I do not know very much about the technique. I think the BB part isn't quite right. If this link doesn't work let me know: https://www.dropbox.com/sh/gq0nfb5tsjxcaqc/AABrUDiScqEaewQK3p5TAtuDa?dl=0