COT (Legacy): Noncommercial Index

study("Noncommercial Index", shorttitle="Noncom Ind", precision=2)
force_root = input("", title="Override Product")
is_includeoptions = input(false, type=bool, title="Include Options")

fxroot =
	  ticker == "USDCAD" ? "CD" : 
	  ticker == "USDCAD" ? "CD" : 
	  ticker == "USDCHF" ? "SF" : 
	  ticker == "USDCZK" ? "CZ" : 
	  ticker == "USDHUF" ? "FR" : 
	  ticker == "USDILS" ? "IS" : 
	  ticker == "USDJPY" ? "JY" : 
	  ticker == "USDMXN" ? "MP" : 
	  ticker == "USDNOK" ? "UN" : 
	  ticker == "USDPLN" ? "PZ" : 
	  ticker == "USDRUB" ? "RU" : 
	  ticker == "USDSEK" ? "SE" : 
	  ticker == "USDZAR" ? "RA" : 
	  ticker == "EURUSD" ? "EC" : 
	  ticker == "AUDUSD" ? "AD" : 
	  ticker == "GBPUSD" ? "BP" : 
	  ticker == "NZDUSD" ? "NE" : 
	  ticker == "BRLUSD" ? "BR" : 
	  ""
root = force_root == "" ? fxroot == "" ? syminfo.root : fxroot : force_root
code = root + (is_includeoptions ? "_FO" : "_F") + "_L_ALL"

is_inversed = 
	  ticker == "USDCAD" ? true : 
	  ticker == "USDCAD" ? true : 
	  ticker == "USDCHF" ? true : 
	  ticker == "USDCZK" ? true : 
	  ticker == "USDHUF" ? true : 
	  ticker == "USDILS" ? true : 
	  ticker == "USDJPY" ? true : 
	  ticker == "USDMXN" ? true : 
	  ticker == "USDNOK" ? true : 
	  ticker == "USDPLN" ? true : 
	  ticker == "USDRUB" ? true : 
	  ticker == "USDSEK" ? true : 
	  ticker == "USDZAR" ? true : 
	  false

long_noncom = security("QUANDL:CFTC/"+code+"|1", "D", close) 
short_noncom = close

long = is_inversed ? short_noncom : long_noncom
short = is_inversed ? long_noncom : short_noncom
net = long-short

length = input(24, title="Period (weeks)")

max = highest(net, length)
min = lowest(net, length)
index = 100 * (net - min) / (max - min)

index_adopted = security("QUANDL:CFTC/"+code+"|2", "D", index) 

plot(index_adopted, color = black, title="Index", style=line)
hline(60, color=blue, linestyle=dashed)
hline(10, color=blue, linestyle=dashed)