Class BollingerBands

布林带 (BBANDS) 类型：波动性

布林带 (BBANDS) 由 John A. Bollinger 提出，是在移动平均线上下设置的包络线。窄带表示横盘趋势（区间市场）。为了判断突破方向，Investopia.com 建议结合使用相对强弱指数 (RSI) 以及一个或两个基于成交量的指标，如 David Bostian 开发的日内强度指数或 Larry William 开发的累积/派发指标。

当上轨和下轨扩张时，可能出现“M”形和“W”形形态。“W”形表示看涨走势，“M”形表示看跌走势。

See

https://www.investopedia.com/terms/b/bollingerbands.asp

Hierarchy (View Summary)

TechnicalIndicator<BandsResult, number>
- BollingerBands

Index

Constructors

Properties

deviationMultiplier interval prices

Accessors

Methods

add getRequiredInputs getResult getResultOrThrow replace update updates

Constructors

constructor

new BollingerBands(
interval: number,
deviationMultiplier?: number,
): BollingerBands
Parameters
- interval: number
- deviationMultiplier: number = 2
Returns BollingerBands
Overrides TechnicalIndicator.constructor
- Defined in volatility/BBANDS/BollingerBands.ts:18

Properties

`Readonly`deviationMultiplier

deviationMultiplier: number = 2

`Readonly`interval

interval: number

`Readonly`prices

prices: number[] = []

Accessors

isStable

get isStable(): boolean
Returns boolean
Inherited from TechnicalIndicator.isStable
- Defined in types/Indicator.ts:37

Methods

add

add(input: number): null | BandsResult
Parameters
- input: number
Returns null | BandsResult
Inherited from TechnicalIndicator.add
- Defined in types/Indicator.ts:41

getRequiredInputs

getRequiredInputs(): number
Returns number
Overrides TechnicalIndicator.getRequiredInputs
- Defined in volatility/BBANDS/BollingerBands.ts:25

getResult

getResult(): null | BandsResult
Returns null | BandsResult
Inherited from TechnicalIndicator.getResult
- Defined in types/Indicator.ts:21

getResultOrThrow

getResultOrThrow(): BandsResult
Returns BandsResult
Inherited from TechnicalIndicator.getResultOrThrow
- Defined in types/Indicator.ts:29

replace

replace(input: number): null | BandsResult
Parameters
- input: number
Returns null | BandsResult
Inherited from TechnicalIndicator.replace
- Defined in types/Indicator.ts:45

update

update(
price: number,
replace: boolean,
): null | { lower: number; middle: number; upper: number }
Parameters
- price: number
- replace: boolean
Returns null | { lower: number; middle: number; upper: number }
Overrides TechnicalIndicator.update
- Defined in volatility/BBANDS/BollingerBands.ts:29

updates

updates(inputs: readonly number[], replace?: boolean): (null | BandsResult)[]
Parameters
- inputs: readonly number[]
- replace: boolean = false
Returns (null | BandsResult)[]
Inherited from TechnicalIndicator.updates
- Defined in types/Indicator.ts:51