Calculates the highest value in the ARRAY over the preceding
periods (periods includes the current day).
HHV accepts periods parameter that can be constant as well as time-variant (array).
EXAMPLE
The formula "hhv( close, 4)" returns the highest
closing price over the preceding four periods; "hhv( high, 8)"
returns the highest high price over the preceding eight periods.
SEE ALSO
References:
The HHV function is used in the following formulas
in AFL on-line library: