Class BollingerPercentBRTIndicator

java.lang.Object

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

com.wualabs.qtsurfer.engine.indicators.bollinger.BollingerPercentBRTIndicator

All Implemented Interfaces:

Resettable, RTIndicator

public class BollingerPercentBRTIndicator
extends AbstractRTIndicator

Bollinger %B indicator with O(1) per-tick computation.

Measures where the current price sits relative to the Bollinger Bands:

  %B = (price - lowerBand) / (upperBand - lowerBand)

Values: 0 = at lower band, 0.5 = at middle, 1 = at upper band. Values above 1 or below 0 indicate price outside the bands.

Decorator pattern: wraps an existing BollingerBandsRTIndicator.

Constructor Summary

Constructors

Constructor	Description
BollingerPercentBRTIndicator(BollingerBandsRTIndicator bollinger)

Method Summary

Modifier and Type	Method	Description
boolean	isReady()	Returns whether this indicator has received enough data to produce meaningful values.
void	reset()
double	update(double newValue)

Methods inherited from class AbstractRTIndicator

equals, getDisplayHint, getMeta, getValue, 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

Constructor Details

BollingerPercentBRTIndicator

public BollingerPercentBRTIndicator(BollingerBandsRTIndicator bollinger)

Method Details

isReady

public boolean isReady()

Description copied from interface: RTIndicator

Returns whether this indicator has received enough data to produce meaningful values.

During the warmup period, RTIndicator.getValue() may return 0 or a partial estimate that should not be used for trading decisions. Once this method returns true, the indicator's output is statistically valid.

The default implementation returns true for backward compatibility. Indicators with warmup requirements should override this method.

For composite indicators (e.g. Bollinger Bands, MACD), readiness is determined by the slowest internal component.

An indicator derived from other indicators (a distance between two of them, a function of one, a view of a parent's band) is ready when all the indicators it reads are ready, plus its own warm-up if it has one. It must not report ready from the first point while its sources are still warming up, and resetting it returns the indicators it updates to their start.

Returns:

true if the indicator has completed its warmup period

reset

public void reset()

Specified by:

reset in interface Resettable

Overrides:

reset in class AbstractRTIndicator

update

public double update(double newValue)

Specified by:

update in interface RTIndicator

Overrides:

update in class AbstractRTIndicator