Calculate the Guppy Multiple Moving Average of a series.
Price, volume, etc. series that is coercible to xts or matrix.
Vector of short-term periods.
Vector of long-term periods.
The Guppy Multiple Moving Average signals a changing
trend when the
long groups of
moving averages intersect. An up/down trend exists when
the short/long-term moving averages are greater than the
A object of the same class as
a vector (if
try.xts fails) containing the Guppy
Multiple Moving Average.
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