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.