DPO {TTR} | R Documentation |
De-Trended Price Oscillator
Description
The Detrended Price Oscillator (DPO) removes the trend in prices - or other series - by subtracting a moving average of the price from the price.
Usage
DPO(x, n = 10, maType, shift = n/2 + 1, percent = FALSE, ...)
Arguments
x |
Price, volume, etc. series that is coercible to xts or matrix. |
n |
Number of periods for moving average. |
maType |
A function or a string naming the function to be called. |
shift |
The number of periods to shift the moving average. |
percent |
logical; if |
... |
Other arguments to be passed to the |
Details
The Detrended Price shows cycles and overbought / oversold conditions.
Value
A object of the same class as x
or a vector (if try.xts
fails) containing the DPO values.
Warning
The detrended price oscillator removes the trend in the series by centering the moving average. Centering the moving average causes it to include future data. Therefore, even though this indicator looks like a classic oscillator, it should not be used for trading rule signals.
Note
DPO does not extend to the last date because it is based on a displaced moving
average. The calculation shifts the results shift
periods, so the last
shift
periods will be zero.
As stated above, the DPO can be used on any univariate series, not just price.
Author(s)
Joshua Ulrich
References
The following site(s) were used to code/document this
indicator:
https://school.stockcharts.com/doku.php?id=technical_indicators:detrended_price_osci
See Also
See EMA
, SMA
, etc. for moving average
options; and note Warning section. See MACD
for a general
oscillator.
Examples
data(ttrc)
priceDPO <- DPO(ttrc[,"Close"])
volumeDPO <- DPO(ttrc[,"Volume"])