PHP Manual
Trader 函数
Rate of change ratio: (price/prevPrice)

trader_rocr

(PECL trader >= 0.2.0)

trader_rocr — Rate of change ratio: (price/prevPrice)

说明

trader_rocr ( array $real [, int $timePeriod ] ) : array

参数

real: 浮点数数组。
timePeriod: Number of period. Valid range from 2 to 100000.

返回值

Returns an array with calculated data or false on failure.

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