Could use some help on applying a script to a watchlist

[buick39]

Have to bear with me as I know little of nothing about applying a script I got of here to make it work in TOS. This is supposed to be able to scan for FIB % and show up in a watchlist and found it on this site and open to you have anything better but I will post what I have. Would like to see 50% or maybe 61.8% pullbacks Thanks for any help.

def a = HighestAll(high);
def b = LowestAll(low);
def barnumber = BarNumber();
def c = if high == a then barnumber else Double.NaN;
def d = if low == b then barnumber else Double.NaN;
rec highnumber = CompoundValue(1, if IsNaN(c) then highnumber[1] else c, c);
def highnumberall = HighestAll(highnumber);
rec lownumber = CompoundValue(1, if IsNaN(d) then lownumber[1] else d, d);
def lownumberall = LowestAll(lownumber);
def day = GetDay();
def month = GetMonth();
def year = GetYear();
def lastDay = GetLastDay();
def lastmonth = GetLastMonth();
def lastyear = GetLastYear();
def isToday = If(day == lastDay and month == lastmonth and year == lastyear, 1, 0);
def istodaybarnumber = HighestAll(if isToday then barnumber else Double.NaN);
def pct = round(100 * (close - b) / (a - b));
AddLabel(yes, Concat(pct, "%FIB"), if pct < 61.8 then Color.GREEN else if pct > 78.6 then Color.RED else Color.CURRENT);

 

[MerryDay]

It appears that you did not provide enough detail for anyone to say where you went astray when you loaded your script into the watchlist quote widget.

Here is a tutorial:
https://usethinkscript.com/threads/...hlist-column-a-tutorial-for-thinkorswim.9709/

You need to explain exactly what steps you took and then what step is causing difficulty.

Taking a screenshot of the error that you are getting, will help the contributors chime in as to where you are going astray.