trader_bbands
(PECL trader >= 0.2.0)
trader_bbands — Bollinger Bands
说明
trader_bbands(
array
int
float
float
int
): array
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.