kinda jumping into this discussion...apologies in advance
pivot range per formula 20 (fishers ACD method) is basically the HL (h+l/2) as one anchor (central pivot or cp) and the ((HLC-HL)+HLC) as another (directional pivot or dp per fattails)
these should be easy to code as sierra has the hl and hlc as part of the dailyohlc study which also has the project forward and if you use transfillrect top and bottom you can color code the pivot range kinda like fattails version
anyone have any luck creating a 3 day rolling pivot range? sierra for some reason does not offer a rolling version