Trend Trader — Indicator by HPotter

This is plots the indicator developed by Andrew Abraham
in the Trading the Trend article of TASC September 1998

Open-source script

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.

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////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 21/08/2014
// This is plots the indicator developed by Andrew Abraham 
// in the Trading the Trend article of TASC September 1998  
////////////////////////////////////////////////////////////
study(title="Trend Trader", overlay = true)
Length = input(21, minval=1),
Multiplier = input(3, minval=1)
avgTR      = wma(atr(1), Length)
highestC   = highest(Length)
lowestC    = lowest(Length)
hiLimit = highestC[1]-(avgTR[1] * Multiplier)
loLimit = lowestC[1]+(avgTR[1] * Multiplier)
ret = iff(close > hiLimit and close > loLimit, hiLimit,
        iff(close < loLimit and close < hiLimit, loLimit, nz(ret[1], 0)))
plot(ret, color= blue , title="Trend Trader")