trader_roc
(PECL trader >= 0.2.0)
trader_roc — Rate of change : ((price/prevPrice)-1)*100
说明
array trader_roc
( array $real
[, integer $timePeriod
] )
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.
