(PECL trader >= 0.2.0)
trader_sar — Parabolic SAR
$high
, array $low
[, float $acceleration
[, float $maximum
]] )
high高价，浮点数数组。
low低价，浮点数数组。
accelerationAcceleration Factor used up to the Maximum value. Valid range from 0 to TRADER_REAL_MAX.
maximumAcceleration Factor Maximum value. Valid range from 0 to TRADER_REAL_MAX.
Returns an array with calculated data or false on failure.