Class BollingerBandWidthRTIndicator

java.lang.Object

com.wualabs.qtsurfer.engine.indicators.core.AbstractRTIndicator

com.wualabs.qtsurfer.engine.indicators.core.AbstractDecorableRTIndicator

com.wualabs.qtsurfer.engine.indicators.bollinger.BollingerBandWidthRTIndicator

All Implemented Interfaces:

Resettable, RTIndicator

public class BollingerBandWidthRTIndicator
extends AbstractDecorableRTIndicator

Bollinger BandWidth RT Indicator.

See Also:

• http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:bollinger_band_width

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ID	Canonical catalog id, set as an explicit IndicatorMeta.ID override where getId() class-name derivation would be wrong.

Constructor Summary

Constructors

Constructor	Description
BollingerBandWidthRTIndicator(@NonNull BollingerBandsRTIndicator bollingerBandsRTIndicator)

Method Summary

Modifier and Type	Method	Description
double	getValue()	Computes the Bollinger BandWidth as a percentage: 100 * (upper - lower) / middle.
boolean	isReady()	Ready when the wrapped indicator is: this wrapper has no warm-up of its own.
void	reset()	This indicator is a view of the bands, which it never updates and so does not own: resetting it only clears its own value, and the bands go back to their start when their owner resets them.
double	update(double newValue)

Methods inherited from class AbstractDecorableRTIndicator

getIndicator, getIndicatorValue

Methods inherited from class AbstractRTIndicator

equals, getDisplayHint, getMeta, hashCode, hide, isPoison, setValue, toString, toString, withDisplayHint, withMeta

Methods inherited from class Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Methods inherited from interface RTIndicator

getId, isHidden, ro, update, update

Field Details

ID

public static final String ID

Canonical catalog id, set as an explicit IndicatorMeta.ID override where getId() class-name derivation would be wrong.

See Also:

• Constant Field Values

Constructor Details

BollingerBandWidthRTIndicator

public BollingerBandWidthRTIndicator(@NonNull
 @NonNull BollingerBandsRTIndicator bollingerBandsRTIndicator)

Method Details

isReady

public boolean isReady()

Description copied from class: AbstractDecorableRTIndicator

Ready when the wrapped indicator is: this wrapper has no warm-up of its own.

Specified by:

isReady in interface RTIndicator

Overrides:

isReady in class AbstractDecorableRTIndicator

Returns:

true if the indicator has completed its warmup period

reset

public void reset()

This indicator is a view of the bands, which it never updates and so does not own: resetting it only clears its own value, and the bands go back to their start when their owner resets them.

Specified by:

reset in interface Resettable

Overrides:

reset in class AbstractDecorableRTIndicator

getValue

public double getValue()

Computes the Bollinger BandWidth as a percentage: 100 * (upper - lower) / middle. This is a derived/lazy indicator that recalculates from the Bollinger Bands state on every read rather than maintaining its own state.

Specified by:

getValue in interface RTIndicator

Overrides:

getValue in class AbstractRTIndicator

Returns:

the bandwidth as a percentage of the middle band

update

public double update(double newValue)

Specified by:

update in interface RTIndicator

Overrides:

update in class AbstractRTIndicator