trader_bbands
(PECL trader >= 0.2.0)
trader_bbands — Bollinger Bands
说明
trader_bbands
( array
$real
[, int $timePeriod
[, float $nbDevUp
[, float $nbDevDn
[, int $mAType
]]]] ) : array
参数
-
real -
浮点数数组。
-
timePeriod -
Number of period. Valid range from 2 to 100000.
-
nbDevUp -
Deviation multiplier for upper band. Valid range from TRADER_REAL_MIN to TRADER_REAL_MAX.
-
nbDevDn -
Deviation multiplier for lower band. Valid range from TRADER_REAL_MIN to TRADER_REAL_MAX.
-
mAType -
Type of Moving Average. TRADER_MA_TYPE_* series of constants should be used.
返回值
Returns an array with calculated data or false on failure.