KDJ Indicator - @iamaltcoin,modified by Yanga

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KDJ Indicator - @iamaltcoin,modified by Yanga
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// @author bitcoinwisdom, modified by Yanga
// This KDJ indicator is a mimic of the same indicator on bitcoinwisdom
// This script is released free of charge with no warranty
// Please leave a not to the author of this script if it is used
// whole or in part
study("KDJ Indicator - @iamaltcoin,modified by Yanga", shorttitle="KDJ_Yanga")
ilong = input(9, title="period")
isigK = input(3, title="signal K")
isigD = input(3, title="signal D")

bcwsma(s,l,m) => 
    _s = s
    _l = l
    _m = m
    _bcwsma = (_m*_s+(_l-_m)*nz(_bcwsma[1]))/_l

c = close
h = highest(high, ilong)
l = lowest(low,ilong)
RSV = 100*((c-l)/(h-l))
pK = sma(RSV, isigK)
pD = sma(pK, isigD)
pJ = 3 * pK-2 * pD
plot(pK, color=orange)
plot(pD, color=lime)
plot(pJ, color=fuchsia)
h0 = hline(80)
h1 = hline(20)
h2 = hline(100)
h3 = hline(0)
bgcolor(pJ>pD? green : red, transp=70)
Thanks for your contribution. If this isn't too much for ask: Could you add paramaters to customize bgcolors?
On this line of code: what the slm stands for? bcwsma(s,l,m). Thanks.
yax22 syracusepro
well, s is signal, l is the length or number of periods, and m is the weighting. In principle, it is from the weighted moving average function y=(m*x+(l-m)*y')/l, where y' denotes the y value in its previous period. This code is just from the math book and also from the author bitcoinwisdom, no creative :). And here you can alternatively use the bcwsma instead of sma, or you just still use sma. This change will make curves different. Maybe could get something from this change in different cases. Hope my answer is fit your question :)
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