(PECL trader >= 0.2.0)
trader_adx — Average Directional Movement Index
$high
, array $low
, array $close
[, integer $timePeriod
] )
high
高价，浮点数数组。
low
低价，浮点数数组。
close
收盘价，浮点数数组。
timePeriod
Number of period. Valid range from 2 to 100000.
Returns an array with calculated data or false on failure.