(PECL trader >= 0.2.0)
trader_dx — Directional Movement Index
$high,$low,$close,$timePeriod = ?
high高價(jià),浮點(diǎn)數(shù)數(shù)組。
low低價(jià),浮點(diǎn)數(shù)數(shù)組。
close收盤價(jià),浮點(diǎn)數(shù)數(shù)組。
timePeriodNumber of period. Valid range from 2 to 100000.
Returns an array with calculated data or false on failure.