EMV {TTR}R Documentation

Arms' Ease of Movement Value

Description

Arms' Ease of Movement Value (EMV) emphasizes days where the security moves easily and minimizes days where the security does not move easily. Developed by Richard W. Arms, Jr.

Usage

  EMV(HL, volume, n=9, maType="SMA", vol.divisor=10000, ...)

Arguments

HL Object able to be coerced to a matrix, which contains a High-Low price series.
volume Vector or matrix of volume observations corresponding to the HL object.
n Number of periods for moving average.
maType A function or a string naming the function to be called.
vol.divisor An increment to make the results larger and easier to work with.
... Other arguments to be passed to the maType function.

Details

The EMV is calculated by dividing the midpoint ([high + low]/2) move by the 'Box Ratio' (volume divided by the high minus low).

Value

A matrix containing the columns:

emv The ease of movement values.
emvMA The smoothed (as specified by ma) ease of movement values.

Note

A buy/sell signal is generated when the EMV crosses above/below zero. When the EMV hovers around zero, there are small price movements and/or high volume, and the price is not moving easily.

Author(s)

Josh Ulrich

References

The following site(s) were used to code/document this indicator:
http://www.fmlabs.com/reference/ArmsEMV.htm
http://www.equis.com/Customer/Resources/TAAZ/?c=3&p=51
http://linnsoft.com/tour/techind/arms.htm

See Also

See EMA, SMA, etc. for moving average options; and note Warning section.

Examples

  data(ttrc)
  emv <- EMV(ttrc[,c("High","Low")], ttrc[,"Volume"])

[Package TTR version 0.14-0 Index]