(PECL trader >= 0.2.0)
Directional Movement Index
array trader_dx ( array $high, array $low, array $close [, integer $timePeriod ] )
Parameters:
high
High price, array of real values.
low
Low price, array of real values.
close
Closing price, array of real values.
timePeriod
Number of period. Valid range from 2 to 100000.
Returns:
Returns an array with calculated data or false on failure.
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