(PECL trader >= 0.2.0)
trader_natr — Normalized Average True Range
$high
, array $low
, array $close
[, integer $timePeriod
] )
highHigh price, array of real values.
lowLow price, array of real values.
closeClosing price, array of real values.
timePeriodNumber of period. Valid range from 2 to 100000.
Returns an array with calculated data or false on failure.