trader_sar

(PECL trader >= 0.2.0)

trader_sar — Parabolic SAR

array trader_sar ( array $high , array $low [, float $acceleration [, float $maximum ]] )

high: 高价，浮点数数组。
low: 低价，浮点数数组。
acceleration: Acceleration Factor used up to the Maximum value. Valid range from 0 to TRADER_REAL_MAX.
maximum: Acceleration Factor Maximum value. Valid range from 0 to TRADER_REAL_MAX.

Returns an array with calculated data or false on failure.