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# Average True Range Trailing Stops, by Sylvain Vervoort

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Average True Range Trailing Stops, by Sylvain Vervoort
The related article is copyrighted material from Stocks & Commodities Jun 2009
```////////////////////////////////////////////////////////////
//  Copyright by HPotter v1.0 16/09/2014
// Average True Range Trailing Stops, by Sylvain Vervoort
// The related article is copyrighted material from Stocks & Commodities Jun 2009
////////////////////////////////////////////////////////////
study(title="Average True Range Trailing Stops, by Sylvain Vervoort", overlay = true)
nATRPeriod = input(5)
nATRMultip = input(3.5)
xATR = atr(nATRPeriod)
nLoss = nATRMultip * xATR
xATRTrailingStop = iff(close > nz(xATRTrailingStop[1], 0) and close[1] > nz(xATRTrailingStop[1], 0), max(nz(xATRTrailingStop[1]), close - nLoss),
iff(close < nz(xATRTrailingStop[1], 0) and close[1] < nz(xATRTrailingStop[1], 0), min(nz(xATRTrailingStop[1]), close + nLoss),
iff(close > nz(xATRTrailingStop[1], 0), close - nLoss, close + nLoss)))
plot(xATRTrailingStop, color=red, title="ATR Trailing Stop")

```
Even the weekly trend chart has turned against Bitcoin:

ChartArt
it happened from nz(xATRTrailingStop, 0) Formula use previos value and can not get it. This function return 0.
HPotter
I have no problem with the beginning of the weird ATR trailing stop, because the end of the chart is what interests me.
ChartArt
You mean where the red line passes thru and above the price. I was frowning at that too.
FluidicFX
yes, exactly
So what is the strategy that can be used.. How do you know if you should take an ATR change trade. I get the buy point on the change but is there something that help say this change is better than the last?
prolongwealth
I don`t know.
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