Colby Indicator For Tradestation

[slableak]

I was wondering if anyone here would translate this E-Signal coding into a Tradestation ELD Cloby Indicator. In E-Signal it has shaded area above and below the 0 line but not on the Trade Station eld found on TradeStation forums.

Provided By : eSignal (c) Copyright 2006
Description: Stochastics With Long Term EMA Filter
by Robert Colby

Version 1.0 10/09/2006

Notes:
* Dec 2006 Issue of Stocks and Commodities Magazine
* Study requires at least 271 bars of data.
* As a non-price study, the formula uses the EMA study as
part of the conditions for the trade signal but cannot
plot the EMA on the price chart simultaneously with the StochK.
If desired, add the EMA study to the price pane with the EMA
from Basic Studies menu (use Length 271 with Close as the Source).
* When the Close is above the 271-period EMA the top half of the study
pane's background will be colored green. When the Close is below
the 271-period EMA, the bottom half of the study pane's background
will be colored red. In addition to the background of the study
pane, the price bars will b e will also be colored to match the
background coloring sc heme.


Formula Parameters: Default:
Stoch Upper Band 70
Stoch Lower Band 30
EMA Periods 271
StochK Periods 7
StochK Smoothing 3
************************* ************************* ***************/

function preMain() {
setStudyTitle("Stochastic s with EMA Filter ");
setCursorLabelName("EMA", 0);
setCursorLabelName("Stoch K", 1);
setDefaultBarFgColor(Colo r.navy, 1);
setDefaultBarThickness(2, 1);
setShowTitleParameters(fa lse);
setColorPriceBars(true);
setDefaultPriceBarColor(C olor.grey);


var fp1 = new FunctionParameter("nUpper Band", FunctionParameter.NUMBER) ;
fp1.setName("Stoch Upper Band");
fp1.setLowerLimit(0);
fp1.setDefault(70);

var fp2 = new FunctionParameter("nLower Band", FunctionParameter.NUMBER) ;
fp2.setName("Stoch Lower Band");
fp2.setLowerLimit(0);
fp2.setDefault(30);

var fp3 = new FunctionParameter("nMAlen ", FunctionParameter.NUMBER) ;
fp3.setName("EMA Periods");
fp3.setLowerLimit(1);
fp3.setDefault(271);

var fp4 = new FunctionParameter("nKlen" , FunctionParameter.NUMBER) ;
fp4.setName("StochK Periods");
fp4.setLowerLimit(1);
fp4.setDefault(7);

var fp5 = new FunctionParameter("nKsma" , FunctionParameter.NUMBER) ;
fp5.setName("StochK Smoothing");
fp5.setLowerLimit(1);
fp5.setDefault(3);
}

// Global Variables
var bVersion = null; // Version flag
var bInit = false; // Initialization flag
var xMA = null; // EMA series
var xStochK = null; // StochK series

// Strategy Variables
var vPosition = 0; // position status (1=long, 0=flat, -1=short)
var bRealTime = false; // back testing flag

function main(nUpperBand, nLowerBand, nMAlen, nKlen, nKsma) {
if (bVersion == null) bVersion = verify();
if (bVersion == false) return;

var nState = getBarState();
var nIndex = getCurrentBarIndex();
var c = close(0);
var c_1 = close(-1);

//Initialization
if (bInit == false) {
addBand(nUpperBand, PS_SOLID, 1, Color.blue, "upper");
addBand(nLowerBand, PS_SOLID, 1, Color.blue, "lower");
xMA = ema(nMAlen);
xStochK = stochK(nKlen, nKsma, 1);
bInit = true;
}

var nEMA = xMA.getValue(0);
var nEMA_1 = xMA.getValue(-1);
var nK = xStochK.getValue(0);
var nK_1 = xStochK.getValue(-1);
if (nEMA_1 == null || nK_1 == null) return; // null check

if (nIndex == 0) bRealTime = true;

//Coloring scheme for close vs. EMA
if (c >= nEMA) {
setBarBgColor(Color.aqua, 0, 100, 50);
setPriceBarColor(Color.aq ua);
} else {
setBarBgColor(Color.red, 0, 50, 0);
setPriceBarColor(Color.re d);
}


// Exit Signals
if (nState == BARSTATE_NEWBAR && vPosition != 0) {
if (vPosition == 1) { // long
if (c_1 < nEMA_1 || nK_1 > nUpperBand) {
drawTextRelative(0, 50, "X", Color.white, Color.maroon,
Text.CENTER|Text.FRAME|Te xt.BOLD|Text.BOTTOM, null, 10);
drawShape(Shape.SQUARE, TopRow1, Color.khaki);
vPosition = 0;
if (bRealTime == false) { // back test
Strategy.doSell("Long Exit", Strategy.MARKET, Strategy.THISBAR);
}
&n bsp; }
} el se if (vPosition == -1) { // short
if (c_1 > nEMA_1 || nK_1 < nLowerBand) {
drawTextRelative(0, 50, "X", Color.white, Color.maroon,
Text.CENTER|Text.FRAME|Te xt.BOLD|Text.TOP, null, 10);
drawShape(Shape.SQUARE, BottomRow1, Color.khaki);
vPosition = 0;
if (bRealTime == false) { // back test
&n bsp; Strat egy.doCover("Short Exit", Strategy.MARKET, Strategy.THISBAR);
}
}
}
}

// Entry Signals
if (nState == BARSTATE_NEWBAR) {
if (vPosition != 1) { // long
if (nK_1 < nLowerBand && c_1 > nEMA_1) {
drawTextRelative(0, 50, "Long", Color.white, Color.blue,
Text.RIGHT|Text.F RAME|Text.BOLD|Text.TOP, null, 10);
&n bsp; vPosition = 1;
if (bRealTime == false) { // back test
Strategy.doLong("Long Entry", Strategy.MARKET, Strategy.THISBAR);
}
}
}
if (vPosition != -1) { // short
if (nK_1 > nUpperBand && c_1 < nEMA_1) {
drawTextRe lative(0, 50, "Short", Color.white, Color.blue,
Text.RIGHT|Text.FRAME|Tex t.BOLD|Text.BOTTOM, null, 10);
vPosition = -1;
if (bRealTime == false) { // back test
Strategy.doShort("Short Entry", Strategy.MARKET, Strategy.THISBAR);
}
}
}
}

// Position status
if (vPosition == 1) {
drawShape(Shape.SQUARE, TopRow1, Color .khaki);
} else if (vPosition == -1) {
drawShape(Shape.SQUARE, BottomRow1, Color.khaki);
}

return new Array(nEMA.toFixed(4), nK);
}



function verify() {
var b = false;
if (getBuildNumber() < 779) {
drawTextAbsolute(5, 35, "This study requires version 8.0 or later.",
Color.white, Color.blue, Text.RELATIVETOBOTTOM|Tex t.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|Tex t.RELATIVETOLEFT|Text.BOL D|Text.LEFT,
&nb sp; null, 13, "upgrade");
&nb sp; return b;
} else {
b = true;
}

return b;
}

[walterw]

do you refer to the background with that shaded area ?

[slableak]

	Quote:	walterw
	do you refer to the background with that shaded area ?

Yes, on E-Signal using this easy language it has a shaded area but not on the trade station version.

[walterw]

Slab : can you post a picture of it so I can tell you what can be done for TS... actually TS doesnt have a background plotting feature but it does have a series of diferent alternatives to plot "colors" on an indicator.... cheers Walter

[slableak]

This is what it looks like in TradeStation



This is what it looks like in E-Signal. It is the bottom indicator with the red & blue shaded areas.



Below is the ELD I downloaded from TradeStation forums.

[walterw]

Ok Slab, you want to take a look to this one.... the shades, in this case will be with color and thikness on the overbougth/sold lines.... wich is the relationship between close and ema... you can change that setting on ema if you want... hope it helps, cheers Walter.

[slableak]

Hey, that is great! Thanks Walter...

[walterw]

Glad to help Slab ¡¡

[walterw]

Slab I noticed colors where wrong side, here I atach new one with colors corrected, just reinstall.... cheers Walter.

[slableak]

I noticed that too. Thanks!