Changing size of indicators object drawings

[skirmantas]

How to change size of drawed diamonds and arrows by this script, please ?

P.S. I tried to post script as text but I was unable to finish post - error message.

[skirmantas]

Hi all, what do I need to do to change size of drawed diamonds and arrows in this formula, please ?

***************************************
Provided By : eSignal (c) Copyright 2006
Description: Trading Trends with Bollinger Bands Z - by Jacinta Chan

Version 1.0 01/05/2006

Notes:
* March 2006 Issue of Stocks and Commodities Magazine
* This study is configured for Back Testing and real-
time usage.
* This study uses the z-score indicator and plots as
a price study.
* Study requires version 7.9.1 or higher.


Formula Parameters: Defaults:
Price Source Close
[Open, High, Low, Close, HL/2, HLC/3, OHLC/4]
Number of Periods 20
Number of Standard Deviations 1
***************************************/


function preMain() {
setPriceStudy(true);
setStudyTitle("Bollinger Band Z");
setShowTitleParameters(false);
setCursorLabelName("Upper BB", 0);
setCursorLabelName("Lower BB", 1);
setCursorLabelName("BBZ", 2);
setDefaultBarThickness(2, 0);
setDefaultBarThickness(2, 1);
setComputeOnClose();
setColorPriceBars(true);
setDefaultPriceBarColor(Color.grey);

var fp1 = new FunctionParameter("sPrice", FunctionParameter.STRING);
fp1.setName("Price Source");
fp1.addOption("Open");
fp1.addOption("High");
fp1.addOption("Low");
fp1.addOption("Close");
fp1.addOption("HL/2");
fp1.addOption("HLC/3");
fp1.addOption("OHLC/4");
fp1.setDefault("Close");
var fp2 = new FunctionParameter("nLength", FunctionParameter.NUMBER);
fp2.setName("Number of Periods");
fp2.setLowerLimit(1);
fp2.setDefault(20);
var fp3 = new FunctionParameter("nStdev", FunctionParameter.NUMBER);
fp3.setName("Number of Standard Deviations");
fp3.setLowerLimit(0);
fp3.setDefault(1);
}

var bVersion = null;
var bInit = false;

var xUprBB = null; // Upper Bollinger Band Series
var xLwrBB = null; // Lower Bollinger Band Series
var xStdev = null; // Standard Deviation Series
var xPrice = null; // Price Source Series
var xMA = null; // Moving Average Series
var xZ = null; // Z-score Series
var nCntr = 0; // bar counter for shape tagIDs in doSignals()
var cLong = Color.blue; // price bar color for long position
var cShort = Color.magenta; // price bar color for short position
var cFlat = Color.grey; // price bar color for no position
var vColor = Color.grey; // current bar color

function main(sPrice, nLength, nStdev) {

if (bVersion == null) bVersion = verify();
if (bVersion == false) return;

if (bInit == false) {
xMA = sma(nLength);
switch (sPrice) {
case "Open" :
xPrice = open();
break;
case "High" :
xPrice = high();
break;
case "Low" :
xPrice = low();
break;
case "Close" :
xPrice = close();
break;
case "HL/2" :
xPrice = hl2();
break;
case "HLC/3" :
xPrice = hlc3();
break;
case "OHLC/4" :
xPrice = ohlc4();
break;
default: xPrice = close();
}
xUprBB = upperBB(nLength, nStdev, xPrice);
xLwrBB = lowerBB(nLength, nStdev, xPrice);
xStdev = efsInternal("Stdev", nLength, xPrice);
xZ = efsInternal("calcZ", xPrice, xMA, xStdev, nStdev)
bInit = true;
}

var nState = getBarState();
var Z = xZ.getValue(0);
var Z_1 = xZ.getValue(-1);
if (Z_1 == null) return;

if (nState == BARSTATE_NEWBAR) {
nCntr++;
bExit = false;
}

doSignals(Z, Z_1);
setPriceBarColor(vColor);

if (getCurrentBarIndex() < 0) doBackTest(Z, Z_1);

return new Array(xUprBB.getValue(0), xLwrBB.getValue(0), Z.toFixed(2));
}


/***** Support Functions *****/

var bExit = false; // Flags an exit trade to prevent re-entry on
// the same bar.

function doBackTest(z, z_1) {
// long exit
if (Strategy.isLong()) {
if (z_1 >= 1 && z < 1) {
Strategy.doSell("Long Stop",
Strategy.CLOSE, Strategy.THISBAR);
bExit = true;
}
}

// short exit
if (Strategy.isShort()) {
if (z_1 <= -1 && z > -1) {
Strategy.doCover("Short Stop",
Strategy.CLOSE, Strategy.THISBAR);
bExit = true;
}
}

// long entry
if (!Strategy.isLong() && bExit == false) {
if (z_1 <= 1 && z > 1) Strategy.doLong("Long Entry",
Strategy.CLOSE, Strategy.THISBAR);
}

// short entry
if (!Strategy.isShort() && bExit == false) {
if (z_1 >= -1 && z < -1) Strategy.doShort("Short Entry",
Strategy.CLOSE, Strategy.THISBAR);
}

return;
}


function doSignals(z, z_1) {
// long entry
if (z_1 <= 1 && z > 1) {
drawShape(Shape.UPARROW, BelowBar2, Color.green, "upEntry"+nCntr);
Alert.playSound("ding.wav");
vColor = cLong;
}

// short entry
if (z_1 >= -1 && z < -1) {
drawShape(Shape.DOWNARROW, AboveBar2, Color.red, "dnEntry"+nCntr);
Alert.playSound("ding.wav");
vColor = cShort;
}

// long exit
if (z_1 >= 1 && z < 1) {
drawShape(Shape.DIAMOND, AboveBar2, Color.red, "upExit"+nCntr);
Alert.playSound("train.wav");
vColor = cFlat;
}

// short exit
if (z_1 <= -1 && z > -1) {
drawShape(Shape.DIAMOND, BelowBar2, Color.green, "dnExit"+nCntr);
Alert.playSound("train.wav");
vColor = cFlat;
}

return;
}


function Stdev(n, source) {
if (source.getValue(-n) == null) return null;

var sumX = 0;
var sumX2 = 0;
for (i = 0; i < n; ++i) {
sumX += source.getValue(-i);
sumX2 += (source.getValue(-i) * source.getValue(-i))
}
var meanX = (sumX/n);
var stdev = Math.sqrt((sumX2/n) - (meanX*meanX));

return stdev;
}

function calcZ(c, m, s, n) {
if (c.getValue(0) == null || m.getValue(0) == null ||
s.getValue(0) == null) return null;
var z = (c.getValue(0) - m.getValue(0)) / (s.getValue(0) * n);
return z;
}

function verify() {
var b = false;
if (getBuildNumber() < 730) {
drawTextAbsolute(5, 35, "This study requires version 7.9.1 or later.",
Color.white, Color.blue, Text.RELATIVETOBOTTOM|Text.RELATIVETOLEFT|Text.BOL D|Text.LEFT,
null, 13, "error");
drawTextAbsolute(5, 20, "Click HERE to upgrade.@URL=http://www.esignal.com/download/default.asp",
Color.white, Color.blue, Text.RELATIVETOBOTTOM|Text.RELATIVETOLEFT|Text.BOL D|Text.LEFT,
null, 13, "upgrade");
return b;
} else {
b = true;
}

return b;
}

[ACM]

skirmantas
The size of the objects drawn using any of the drawShape...() functions [ie drawShape(), drawShapeRelative(), etc] is controlled by the chart based on the bar thickness/width and cannot be user-defined.
To accomplish what you want you need to use one of the drawText...() functions and one of the Wingding font types.
Search the forum and you will find several examples on how to do this as this topic has been covered many times before
Alex

How to change size of drawed diamonds and arrows by this script, please ?

P.S. I tried to post script as text but I was unable to finish post - error message.

[skirmantas]

thanks. I will try