(PECL trader >= 0.2.0)
trader_natr — Normalized Average True Range
$high
, array $low
, array $close
[, int $timePeriod
] ) : array
high高値。実数値の配列。
low安値。実数値の配列。
close終値。実数値の配列。
timePeriodNumber of period. Valid range from 2 to 100000.
Returns an array with calculated data or false on failure.