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.