nz.org.venice.chart.graph
Class SupportAndResistenceGraph

java.lang.Object
  nz.org.venice.chart.graph.AbstractGraph
      nz.org.venice.chart.graph.SupportAndResistenceGraph

All Implemented Interfaces:

Graph

public class SupportAndResistenceGraph

extends AbstractGraph

Support and Resistence "graph". This graph draws single lines across common price occurrances. The support and resistence levels are determined by the most numerous troughs and peaks within the last year of data that have the greatest vertical separation and do not overlap. There is a new heuristic which extends the peak/trough counting by placing them into bins and counting their frequency. This improves the results for some charts. NOTE: Experimental and work in progress.

Author:

Mark Hummel

Field Summary

static int	BINS
static int	HEURISTIC

Fields inherited from interface nz.org.venice.chart.graph.Graph

TOOL_TIP_BUFFER

Constructor Summary

SupportAndResistenceGraph(GraphSource source)
Create a new support and Resistence graph.

SupportAndResistenceGraph(GraphSource source, java.util.HashMap settings)
Create a new support and Resistence graph.

Method Summary

Graphable[]	createSupportAndResistence(Graphable source, Graphable support, Graphable resistence, int lag, int type) Creates a new support and resistence based on the given data source.
double	getHighestY(java.util.List x) Return the highest Y value in the given X range.
double	getLowestY(java.util.List x) Return the loweset Y value in the given X range.
java.lang.String	getName() Return the name of this graph.
java.lang.String	getToolTipText(java.lang.Comparable x, int y, int yoffset, double verticalScale, double bottomLineValue) Get the tool tip text for the given X value and y coordinate.
GraphUI	getUI(java.util.HashMap settings) Returns the graph's user interface.
boolean	isPrimary() Return whether the graph is a primary graph.
void	render(java.awt.Graphics g, java.awt.Color c, int xoffset, int yoffset, double horizontalScale, double verticalScale, double topLineValue, double bottomLineValue, java.util.List xRange, boolean vertOrientation) Draw the graph.
void	setSettings(java.util.HashMap settings) Set the graph's user definable settings.

Methods inherited from class nz.org.venice.chart.graph.AbstractGraph

dataAvailable, getAcceptableMajorDeltas, getAcceptableMinorDeltas, getEndX, getSettings, getSource, getSourceName, getSourceType, getStartX, getXRange, getY, getYLabel

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

HEURISTIC

public static final int HEURISTIC

See Also:

Constant Field Values

BINS

public static final int BINS

See Also:

Constant Field Values

Constructor Detail

SupportAndResistenceGraph

public SupportAndResistenceGraph(GraphSource source)

Create a new support and Resistence graph.

Parameters:

source - containing the data source, typically day close.

SupportAndResistenceGraph

public SupportAndResistenceGraph(GraphSource source,
                                 java.util.HashMap settings)

Create a new support and Resistence graph.

Parameters:

source - containing the data source, typically day close.

settings - the settings of the graph

Method Detail

render

public void render(java.awt.Graphics g,
                   java.awt.Color c,
                   int xoffset,
                   int yoffset,
                   double horizontalScale,
                   double verticalScale,
                   double topLineValue,
                   double bottomLineValue,
                   java.util.List xRange,
                   boolean vertOrientation)

Description copied from interface: Graph

Draw the graph.

Parameters:

g - the Graphics object to render to

c - the colour the graph should be rendered in; override this if the graph should be drawn in a certain colour - such as a Moving Average graph

xoffset - the x offset in the graphics object where the graph starts

yoffset - the y offset in the graphics object where the graph starts

horizontalScale - horizontal scale factor; use this to convert between X value in the xRange to a cartesian coordinate x

verticalScale - vertical scale factor; use this to convert between Y value to a cartesian coordinate y

topLineValue - the Y value of the lowest line in the graph

bottomLineValue - the Y value of the lowest line in the graph

xRange - a List of Comparable that contain the X values to plot

vertOrientation - true if increasing y values mean decreasing Y values

getToolTipText

public java.lang.String getToolTipText(java.lang.Comparable x,
                                       int y,
                                       int yoffset,
                                       double verticalScale,
                                       double bottomLineValue)

Get the tool tip text for the given X value and y coordinate.

Specified by:

getToolTipText in interface Graph

Overrides:

getToolTipText in class AbstractGraph

Parameters:

x - the X value

y - the y coordinate

yoffset - y offset from top of graph

verticalScale - vertical scale factor

bottomLineValue - the Y value of the lowest line in the graph

Returns:

tool tip text containing the day low, day high and day close quotes

getHighestY

public double getHighestY(java.util.List x)

Description copied from class: AbstractGraph

Return the highest Y value in the given X range.

Specified by:

getHighestY in interface Graph

Overrides:

getHighestY in class AbstractGraph

Parameters:

x - range of X values

Returns:

the highest Y value of the default GraphSource

getLowestY

public double getLowestY(java.util.List x)

Description copied from class: AbstractGraph

Return the loweset Y value in the given X range.

Specified by:

getLowestY in interface Graph

Overrides:

getLowestY in class AbstractGraph

Parameters:

x - range of X values

Returns:

the lowest Y value of the default GraphSource

getName

public java.lang.String getName()

Return the name of this graph.

Returns:

Bar Chart

isPrimary

public boolean isPrimary()

Description copied from interface: Graph

Return whether the graph is a primary graph. Primary graphs will appear together in the top chart. Secondary graphs appear in their own charts which are added below. The day close graph is primary; while the day close graph is secondary.

Returns:

true if the graph is a primary graph

createSupportAndResistence

public Graphable[] createSupportAndResistence(Graphable source,
                                              Graphable support,
                                              Graphable resistence,
                                              int lag,
                                              int type)

Creates a new support and resistence based on the given data source.

Parameters:

source - the graph source to average

support - the data points of a support line

resistence - the data points of a resistence line Currently only the points of the most numerous peaks and troughs are used as a heuristic to determine the points of support and resistence. It's a heuristic only, and still needs work.

setSettings

public void setSettings(java.util.HashMap settings)

Description copied from class: AbstractGraph

Set the graph's user definable settings.

Specified by:

setSettings in interface Graph

Overrides:

setSettings in class AbstractGraph

Parameters:

settings - the new settings

getUI

public GraphUI getUI(java.util.HashMap settings)

Description copied from class: AbstractGraph

Returns the graph's user interface. The default action is to return null which indicates that the graph does not have a user interface. If the graph does have a user interface then it should override this method.

Specified by:

getUI in interface Graph

Overrides:

getUI in class AbstractGraph

Parameters:

settings - initial settings (ignored)

Returns:

null