EMV {TTR} | R Documentation |
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.
EMV(HL, volume, n=9, maType="SMA", vol.divisor=10000, ...)
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. |
The EMV is calculated by dividing the midpoint ([high + low]/2) move by the 'Box Ratio' (volume divided by the high minus low).
A matrix containing the columns:
emv |
The ease of movement values. |
emvMA |
The smoothed (as specified by ma ) ease of movement values. |
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.
Josh Ulrich
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 EMA
, SMA
, etc. for moving average options; and note
Warning section.
data(ttrc) emv <- EMV(ttrc[,c("High","Low")], ttrc[,"Volume"])