(PECL trader >= 0.2.0)
trader_midprice — Midpoint Price over period
$high, array $low, int $timePeriod = ?): array
high高値。実数値の配列。
low安値。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.