<?php
// ADXR 衡量 ADX 動能變化的差異。
// ADXR 等於目前的 ADX 加上 n 個先前資料點的 ADX，再除以 2。
$highs = array(118.99, 119.14, 120.5, 115.23, 115.93, 118.829, 116, 112.2, 110.88, 110.19, 112.86, 112.11, 110.25, 112.44);
$lows = array(112.68, 115.26, 112.5, 110, 112.8, 113.61, 112.04, 108.71, 106.09, 103.1, 109.16, 106.77, 105, 107.67);
$closes = array(112.82, 117.32, 113.49, 112, 115.355, 115.54, 112.13, 110.34, 106.84, 110.08, 111.81, 107.12, 108.22, 112.28);
$time_period = floor((count($highs)-2) / 2)-2;
var_dump(trader_adxr($highs, $lows, $closes, $time_period));
/*
array(4) {
[10]=>
float(41.004)
[11]=>
float(44.783)
[12]=>
float(50.257)
[13]=>
float(43.597)
}
*/