In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.
study("Snake Oscillator","SNK_OSC") len = input(25,"Length") h = ema(high,len) l = ema(low,len) hp = h/h[len] lp = l/l[len] avg = avg(hp,lp) havg = ema(highest(avg,len),len) lavg = ema(lowest(avg,len),len) avg2 = avg(havg,lavg) dif = havg - avg2 pa = plot(avg,color=gray) ph = plot(havg,color=gray) pl = plot(lavg,color=gray) plot(havg+dif,color=black) plot(lavg-dif,color=black) fill(ph,pa,color=red,transp=60) fill(pl,pa,color=green,transp=60)