java.lang.Object

com.arbergashi.charts.render.BaseRenderer

com.arbergashi.charts.render.financial.StochasticRenderer

All Implemented Interfaces:: ChartRenderer

public final class StochasticRenderer extends BaseRenderer

StochasticRenderer - Stochastic Oscillator (%K and %D)

Professional Stochastic oscillator renderer for momentum analysis. Displays %K (fast) and %D (slow) lines with overbought/oversold zones.

Features:

%K Line: Fast stochastic (blue)
%D Line: Slow stochastic - 3-period SMA of %K (red)
Overbought: Above 80 zone
Oversold: Below 20 zone
Range: 0-100 scale

Data Mapping:

ChartPoint fields:
  x       → Time/Index
  y       → %K value (fast stochastic)
  weight  → %D value (slow stochastic)

Calculation:

%K = ((Close - Low14) / (High14 - Low14)) * 100
%D = 3-period SMA of %K

Since:: 2026-01-01
Version:: 1.0.0
Author:: Arber Gashi

Field Summary

Fields inherited from class BaseRenderer
PIXEL_BUF, PIXEL_BUF4
Constructor Summary

Constructors

Constructor

Description

StochasticRenderer()
Method Summary

Modifier and Type

Method

Description

protected void

drawData(Graphics2D g, ChartModel model, PlotContext context)

Implementation-specific drawing logic.

double[]

getPreferredYRange(ChartModel model)

Optional Y-range override for autoscaling.

Methods inherited from class BaseRenderer
drawHighlightPoint, drawI18nLabel, drawLabel, getArc, getCachedFont, getCachedGradient, getCachedStroke, getCachedStroke, getCachedStroke, getCubicCurve, getEllipse, getId, getLayerIndex, getLegendColor, getLine, getName, getPathCache, getPointAt, getRect, getRoundRectangle, getSeriesColor, getSeriesStroke, getTheme, getTooltipText, isLegendRequired, isMultiColor, pBuffer, pBuffer4, render, resolveTheme, seriesOrBase, setLayerIndex, setMultiColor, setTheme, setupQualityHints, themeAccent, themeAxisLabel, themeBackground, themeBearish, themeBullish, themeForeground, themeGrid, themeSeries

Methods inherited from class Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface ChartRenderer
clearHover, createContext, getFocusValues, renderEmptyState, supportsEmptyState

Constructor Details
- StochasticRenderer
  
  public StochasticRenderer()
Method Details
- drawData
  
  protected void drawData(Graphics2D g, ChartModel model, PlotContext context)
  
  Description copied from class: BaseRenderer
  
  Implementation-specific drawing logic. Must follow Zero-Allocation rules.
  
  Specified by:
  
  drawData in class BaseRenderer
- getPreferredYRange
  
  public double[] getPreferredYRange(ChartModel model)
  
  Description copied from interface: ChartRenderer
  
  Optional Y-range override for autoscaling.
  Renderers may return a {minY, maxY} array when the visible range should be based on derived data rather than the model's raw Y-values (e.g. indicators like MACD).
  
  Parameters:
  
  model - the layer model
  
  Returns:
  
  {minY, maxY} or null to use model Y-values