WPR: William's %R In TTR: Technical Trading Rules

William's % R.

Usage

 `1` ``` WPR(HLC, n = 14) ```

Arguments

 `HLC` Object that is coercible to xts or matrix and contains High-Low-Close prices. If only a univariate series is given, it will be used. See details. `n` Number of periods to use.

Details

If an High-Low-Close series is provided, the indicator is calculated using the high/low values. If a vector is provided, the calculation only uses that series.

Value

A object of the same class as `HLC` or a vector (if `try.xts` fails) containing the William's %R values.

Note

The William's %R calculation is similar to stochastics' fast %K.

The value for William's %R will be 0.5 whenever the highest high and lowest low are the same over the last `n` periods.

Joshua Ulrich

References

The following site(s) were used to code/document this indicator:
http://www.fmlabs.com/reference/WilliamsR.htm
http://www.equis.com/Customer/Resources/TAAZ?c=3&p=126
http://linnsoft.com/tour/techind/willR.htm
http://stockcharts.com/education/IndicatorAnalysis/indic_williamsR.html

See `stoch`.

Examples

 ```1 2 3 4 5 6 7 8 9``` ```data(ttrc) stochOsc <- stoch(ttrc[,c("High","Low","Close")]) stochWPR<- WPR(ttrc[,c("High","Low","Close")]) plot(tail(stochOsc[,"fastK"], 100), type="l", main="Fast %K and Williams %R", ylab="", ylim=range(cbind(stochOsc, stochWPR), na.rm=TRUE) ) lines(tail(stochWPR, 100), col="blue") lines(tail(1-stochWPR, 100), col="red", lty="dashed") ```

Example output

```
```

TTR documentation built on April 15, 2017, 8:31 a.m.