EFS Studies

[arbifox]

Link not found . . .

Hey Andy,

Thanks for your immediate response, I truly appreciate it. The link you gave me is dead, so maybe you can try that again sometime. But as a better explanation, and being fresh in the morning, this is what I need to do. This is such a good piece of functionality, that I think a good discussion will help others.

So I have my personal EFS, that I have loaded with all these other pieces of code and some standard stuff that makes or breaks my strategy. When I use standard E-Sig studies, I just load them in the chart, and call them in the EFS as such:

DECLARATION:
var study1 = new RSIStudy(14, "Close");

OBTAIN VALUE:
var myRSI = study1.getValue(RSIStudy.RSI);

This I am fine with. Now comes some choice piece of code from TSS that I feel is going to help my efforts, for instance:

function preMain()
{
setStudyTitle("Ergotic_MDI (Mean Deviation Indicator)");
setCursorLabelName("ErgMDI", 0);
setCursorLabelName("SigLin", 1);
setCursorLabelName("ZeroLine", 2);
setDefaultBarFgColor(Color.fushcia, 0);
setDefaultBarFgColor(Color.grey, 1);
setDefaultBarFgColor(Color.cyan, 2);
}
var XA1_1 = 0.0;
var XA2_1 = 0.0;
var XA3_1 = 0.0;
var XA4_1 = 0.0;

function main(r, s, u, ZeroLine)
{
if (r == null) r = 32;
if (s == null) s = 5;
if (u == null) u = 5;
if (ZeroLine == null) ZeroLine = 0;
var FactorR = 2 / (r + 1);
var FactorS = 2 / (s + 1);
var FactorU = 2 / (u + 1);
var Close = close(0);
var XA1 = FactorR * Close + (1 - FactorR) * XA1_1;
var XA2 = FactorS * (Close - XA1) + (1 - FactorS) * XA2_1;
var XA3 = FactorU * XA2 + (1 - FactorU) * XA3_1;
var XA4 = FactorU * XA3 + (1 - FactorU) * XA4_1;
if (getBarState() == BARSTATE_NEWBAR)
{
XA1_1 = XA1;
XA2_1 = XA2;
XA3_1 = XA3;
XA4_1 = XA4;
}
return new Array(XA3, XA4, ZeroLine);
}

So this is what I understand. I need to use the call() function, I need to place this EFS in my E-Sig Doc Root Directory, but what I do not understand is how to translate the actual calls.

I know that:

return new Array(XA3, XA4, ZeroLine);

returns values in the EFS through the main() by:

function main(r, s, u, ZeroLine)

My only major missing piece, is how to substitute the commands:

DECLARATION:
var study1 = new RSIStudy(14, "Close");

OBTAIN VALUE:
var myRSI = study1.getValue(RSIStudy.RSI);

with equivalent commands, when I am using a custom study? So how do I call the values returned by r, s, and u from main in my own study.

I appreciate any help on this, it is so key in my understanding of what I am doing right now, so I want to make sure I get it right.

Thanks,

Thomas.

[gspiker]

Thomas,


Either I'm not understanding what you are trying to say, or you have a misunderstanding of how call() and callfunction() work.

return new Array(XA3, XA4, ZeroLine);

returns values in the EFS through the main() by:

function main(r, s, u, ZeroLine)

When you use callFunction("<path and name of EFS>", "<function_name>"[parameter]) it would look like this:

nReturnValue = callFunction("MyEFSStudies\Ergotic_MDI.efs", "main", 32, 5, 5, 0);

The above assumes that you have this efs in the MyEFSStudies subdirectory of eSignal/Formulas, and that you want all the values set to the default (you wouldn't really need to set them in that case, but this is an example).

nReturnValue will then be an array with three values : XA3, XA4, ZeroLine

You could get at these values as you would any array nReturnValue[0] = XA3, etc...

Does this answer the question?

Garth

[arbifox]

Yep, I got it . . .

Garth,

It is me, I was off on the terminology, so it was hard for me to explain. But what you covered is EXACTLY what I need. I just could not understand how the returned values are accessed.

One more thing, is nReturnedValue still declared:

var nReturnedValue=0;

or since it is an array, it is different?

But THANKS SO MUCH, I really appreciate it.

T

[gspiker]

Hi,

var nReturnedValue=0;

will work.

Garth

[arbifox]

thanks again

you guys rock . . . thanks so much!!!

T

[wavetrader]

Re: Fix DemandIndex

Thanks a lot for your great work on efs studies.

However, there are some that need tweaking. One of them is the Demand
Index - this needs to be fixed because after a few bars it goes out of wack,
and needs to be reloaded every 6-10 minutes.

Can somebody look into this?

Thanks a lot.

----- Original Message -----
From: <[email protected]>
To: <[email protected]>
Sent: Wednesday, July 23, 2003 10:55 AM
Subject: Reply to post 'EFS Studies'


> Hello wavetrader,
>
> ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>

[TS Support]

EFS study ##

Our next indicator is FVE (Volatility Modified).

Volume Based > FVE (Volatility Modified) [eSignal EFS Indicators]

Download: http://share.esignal.com/download.js...odifiedFVE.efs

Category: Indicator > Volume Based

Description:

This is another version of FVE indicator that we have posted earlier in this forum.

This version has an important enhancement to the previous one that’s especially useful with intraday minute charts.

Due to the volatility had not been taken into account to avoid the extra complication in the formula, the previous formula has some drawbacks:

The main drawback is that the constant cutoff coefficient will overestimate price changes in minute charts and underestimate corresponding changes in weekly or monthly charts.

And now the indicator uses adaptive cutoff coefficient which will adjust to all time frames automatically,



Inputs:

Samples - number of periods to calculate FVE
Perma - number of days to calculate MA
Cintra - intraday volatility coefficient
Cinter - inter-day volatility coefficient

EFS Code:

/*******************************************************************
Description	: This Indicator plots the Volatility modified FVE formula
Provided By	: TS Support, LLC for eSignal
********************************************************************/

function preMain(){
    setStudyTitle("Volatility Finite Volume Elements");
    setCursorLabelName("FVI",0);
    setDefaultBarFgColor(Color.green,0);
    setCursorLabelName("FVI EMA",1);
    setDefaultBarFgColor(Color.blue,1);
    setDefaultBarThickness(2);
    setComputeOnClose();
    addBand(0, PS_SOLID, 1, Color.black);
}

var EMA_1 = 0;
VolumePlusMinusArray = new Array();

function main(Samples,Perma,Cintra,Cinter){
	if(Samples == null)
		Samples = 22;
	if(Perma == null)
		Perma = 40;
	if(Cintra == null)
		Cintra = .1;
	if(Cinter == null)
		Cinter = .1;
		
	var TP = 0, TP1 = 0, VolumePlusMinus = 0, FVE = 0, Fvesum = 0, VolSum = 0,
	    FveFactor = 0, Intra = 0, Inter = 0, Vintra = 0, Vinter = 0, CutOff = 0, i = 0, K = 2 / (Perma + 1), EMA = 0;
	
	
	IntraArray = new Array();
	InterArray = new Array();
	
	
	for(i = 0; i < Samples; i++){
		IntraArray[i] = Math.log(high(-i)) - Math.log(low(-i));
		InterArray[i] = Math.log((high(-i) + low(-i) + close(-i))/3) - Math.log((high(-i-1)+ low(-i-1) + close(-i-1))/3);
	}
	
	TP = (high() + low() + close())/3;
	TP1 = (high(-1)+ low(-1) + close(-1))/3;
	
	Intra = Math.log(high()) - Math.log(low());
	Vintra = StandardDev(IntraArray,Samples);
	Inter = Math.log(TP) - Math.log(TP1);
	Vinter = StandardDev(InterArray,Samples);
	CutOff = Cintra * Vintra + Cinter * Vinter;	
	MF = (close() - (high() + low())/2)+ TP - TP1;
	
	if(MF > CutOff * close())
		FveFactor = 1;
	else if(MF < -1 * CutOff * close())
		FveFactor = -1;
	else
		FveFactor=0;
		
	
	VolumePlusMinus = volume() * FveFactor;
	for(i = Samples - 1; i > 0; i--)
		VolumePlusMinusArray[i] = VolumePlusMinusArray[i - 1];
	VolumePlusMinusArray[0] = VolumePlusMinus;
	for(i = 0; i < Samples; i++){
		Fvesum += VolumePlusMinusArray[i];
		VolSum += volume(-i);
	}
	
	if(VolumePlusMinusArray[Samples - 1] != null){
		FVE = (Fvesum / VolSum) * 100;
		EMA = K * FVE  + (1 - K) * EMA_1;
		if (getBarState() == BARSTATE_NEWBAR)
			EMA_1 = EMA;
		return new Array(FVE,EMA);
	}
	return null;
}

function StandardDev(Array,Length){
	var i;
	var vSum = 0;
	var SumSqr = 0;
	var StdDev = 0;
	
	for(i = 0; i < Length; i++)
        	vSum += Array[i];

	if(Length != 0)
		for(i = 0; i < Length; i++)
			SumSqr += (Array[i] - vSum / Length) * (Array[i] - vSum / Length);

	StdDev = Math.sqrt(SumSqr / Length);
	return StdDev;
}

[TS Support]

FVE Strategy

Our next study is a strategy based on FVE (Finite Volume Elements) indicator. We have posted it earlier in this thread.

Strategy > FVE Strategy (Finite Volume Elements) [eSignal EFS Indicators]

Download: http://share.esignal.com/download.js...VEStrategy.efs

Category: Strategy

Description:

This is a strategy based on FVE indicator that we have posted earlier in this forum.



Inputs:

Samples - number of bars to calculate FVE
FVEenterl - lower entry level of FVE
FVEenteru - upper entry level of FVE
MA - number of bars to calculate MA
LRPeriod - number of bars to calculate Lin.regression
Bangle - the angle to buy
Sangle - the angle to sell
LRC - number of bars to calculate Lin.regression slope
UB - limit for Lin. regression rising
LB - limit for Lin. regression falling
BarToExitOn - number of bars to exit position

EFS Code:

/*******************************************************************
Description	: FVE Strategy
Provided By	: TS Support, LLC for eSignal
********************************************************************/

/* System Testing Options:
 * Fixed Dollars per trade: $10,000
 * Commissions: Entry $10, Exit: $10
 * Positions: Longs only
 * Number of shares rounded to the nearest 10 shares
 */

function preMain(){
    setStudyTitle("FVE Strategy");
    setComputeOnClose();
    setPriceStudy(true);
}

var EMA_1 = 0;
VolumePlusMinusArray = new Array();
FVEArray = new Array();
BarsSinceEntry = 0;

function main(Samples,FVEenterl,FVEenteru,MA,LRPeriod,Bangle,Sangle,LRC,UB,LB,BarToExitOn){
	if(Samples == null) Samples = 50;
	if(FVEenterl == null) FVEenterl = -20;
	if(FVEenteru == null) FVEenteru = 10;
	if(MA == null) MA = 40;
	if(LRPeriod == null) LRPeriod = 20;
	if(LRPeriod == null) LRPeriod = 20;
	if(Bangle == null) Bangle = 30;
	if(Sangle == null) Sangle = -30;
	if(LRC == null)	LRC = 30;
	if(UB == null) UB = .1;
	if(LB == null) LB = -.5;
	if(BarToExitOn == null) BarToExitOn = 70;
	
		
	var TP = 0, TP1 = 0, MF = 0, Cintra = .1, Cinter = .1, CutOff = 0, VolumePlusMinus = 0,
	     FVE = 0, Fvesum = 0, FveFactor = 0, Intra = 0, Inter = 0, Vintra = 0, Vinter = 0,
	     i = 0, VolSum = 0; K = 2 / (MA + 1), EMA = 0, vHL = high() - low(), vVar = vHL * 0.25,
	    vAddVar = vVar * 0.35, Condition1 = false, Condition2 = false, Condition3 = false, Condition4 = false, Condition5 = false;
		
	IntraArray = new Array();
	InterArray = new Array();
		
	for(i = 0; i < Samples; i++){
		IntraArray[i] = Math.log(high(-i)) - Math.log(low(-i));
		InterArray[i] = Math.log((high(-i) + low(-i) + close(-i))/3) - Math.log((high(-i-1)+ low(-i-1) + close(-i-1))/3);
	}
	
	TP = (high() + low() + close())/3;
	TP1 = (high(-1)+ low(-1) + close(-1))/3;
	
	Intra = Math.log(high()) - Math.log(low());
	Vintra = StandardDev(IntraArray,Samples);
	Inter = Math.log(TP) - Math.log(TP1);
	Vinter = StandardDev(InterArray,Samples);
	CutOff = Cintra * Vintra + Cinter * Vinter;	
	MF = (close() - (high() + low())/2)+ TP - TP1;
	
	if(MF > CutOff * close())
		FveFactor = 1;
	else if(MF < -1 * CutOff * close())
		FveFactor = -1;
	else
		FveFactor=0;
		
	
	VolumePlusMinus = volume() * FveFactor;
	for(i = Samples - 1; i > 0; i--)
		VolumePlusMinusArray[i] = VolumePlusMinusArray[i - 1];
	VolumePlusMinusArray[0] = VolumePlusMinus;
	for(i = 0; i < Samples; i++){
		Fvesum += VolumePlusMinusArray[i];
		VolSum += volume(-i);
	}
	
	if(VolumePlusMinusArray[Samples - 1] != null){
		FVE = (Fvesum / VolSum) * 100;
		for(i = LRPeriod - 1; i > 0; i--)
			FVEArray[i] = FVEArray[i - 1];
		FVEArray[0] = FVE;
		EMA = K * FVE  + (1 - K) * EMA_1;
		if (getBarState() == BARSTATE_NEWBAR)
			EMA_1 = EMA;

	}
	else
		return null;
	
	
	if(FVEArray[LRPeriod - 1] != null){
		BarsSinceEntry++;
		if(FVE > FVEenterl && FVE < FVEenteru)
			Condition1 = true;
		if(LinearReg(FVEArray,LRPeriod,"AngleFC",LRC-1) > Bangle)
			Condition2 = true;
		if(FVE > EMA)
			Condition3 = true;
		if(LinearReg(close(0,-LRC),LRC,"Slope",LRC-1) < UB * LinearReg(close(0,-LRC),LRC,"Value",LRC-1) / 100 &&  LinearReg(close(0,-LRC),LRC,"Slope",LRC-1) > LB * LinearReg(close(0,-LRC),LRC,"Value",LRC-1) / 100)
			Condition4 = true;
		if(LinearReg(FVEArray,LRPeriod,"AngleFC",LRC-1) < Sangle)
			Condition5 = true;
		if(!Strategy.isInTrade()  && Condition1 && Condition2 && Condition3 && Condition4){
			Strategy.doLong("BUY", Strategy.CLOSE, Strategy.THISBAR);
			drawShapeRelative(0, low() - vVar, Shape.UPARROW, "", Color.lime, null, "buyShp" + getValue("time"));
			drawTextRelative(-1, low() - (vVar + vAddVar), "Buy", Color.black, Color.lime, Text.BOLD | Text.ONTOP, null, null, "buyTxt" + getValue("time"));
			BarsSinceEntry = 0;
		}
		if(Condition5){
			Strategy.doShort("FVE EXIT", Strategy.CLOSE, Strategy.THISBAR);
			drawShapeRelative(0, high() + vVar, Shape.DOWNARROW, "", Color.red, null, "sellShp" + getValue("time"));
			drawTextRelative(-1, high() + (vVar + vAddVar), "Short", Color.black, Color.red, Text.BOTTOM | Text.BOLD | Text.ONTOP, null, null, "buyTxt" + getValue("time"));
		}
		if(BarsSinceEntry == BarToExitOn){
			Strategy.doShort("TimeBarsLX", Strategy.CLOSE, Strategy.THISBAR);
			drawShapeRelative(0, high() + vVar, Shape.DOWNARROW, "", Color.red, null, "sellShp" + getValue("time"));
			drawTextRelative(-1, high() + (vVar + vAddVar), "Short", Color.black, Color.red, Text.BOTTOM | Text.BOLD | Text.ONTOP, null, null, "buyTxt" + getValue("time"));
		}
		return LinearReg(close(0,-LRC),LRC,"Slope",LRC-1);
	}
	else
		return null;
}

		
				
function StandardDev(Array,Length,Type){
	var i;
	var vSum = 0;
	var SumSqr = 0;
	var StdDev = 0;
	
	for(i = 0; i < Length; i++)
        	vSum += Array[i];

	if(Length != 0)
		for(i = 0; i < Length; i++)
			SumSqr += (Array[i] - vSum / Length) * (Array[i] - vSum / Length);

	StdDev = Math.sqrt(SumSqr / Length);
	return StdDev;
}

function LinearReg(Array,Length,Type,TargetB){
	var i = 0, num1 = 0, num2 = 0, SumBars = 0, SumSqrBars = 0, SumY = 0, Sum1 = 0, Sum2 = 0, Slope = 0, Intercept = 0;

	if(Length == 0)
		return 0;
	
	SumBars = Length * (Length - 1) * .5;
	SumSqrBars = (Length - 1) * Length * (2 * Length - 1) / 6;
	
	Sum1 = 0;
	for(i = 0; i < Length; i++){
		Sum1 += i * Array[i];
		SumY += Array[i];
	}
	Sum2 = SumBars * SumY;
	Num1 = Length * Sum1 - Sum2;
	Num2 = SumBars * SumBars - Length * SumSqrBars;

	if(Num2 != 0)
		Slope = Num1 / Num2;
	else 
		Slope = 0;
	if(Type == "AngleFC")
		return Math.atan(Slope); 
	else if(Type == "Slope")
		return Slope; 
	else if(Type == "Value"){
		Intercept = (SumY - Slope * SumBars) / Length;
		return Intercept + Slope * (Length - 1 - TargetB);
	}
}

[TS Support]

:: wavetrader ::

You can download modified version of Demand Index here:

http://share.esignal.com/download.js...emandIndex.efs

[TS Support]

## EFS Study

Our next study is an indicator created as addition for FVE (Finite Volume Elements) indicator.

Volume Based > FVE Volatility color-coded Volume bar [eSignal EFS Indicators]

Download: http://share.esignal.com/download.js...BarFormula.efs

Category: Indicator

Description:

The FVE is a pure volume indicator. Unlike most of the other indicators (except OBV), price change doesn’t come into the equation for the FVE (price is not multiplied by volume), but is only used to determine whether money is flowing in or out of the stock. This is contrary to the current trend in the design of modern money flow indicators. The author decided against a price-volume indicator for the following reasons:

- A pure volume indicator has more power to contradict.
- The number of buyers or sellers (which is assessed by volume) will be the same, regardless of the price fluctuation.
- Price-volume indicators tend to spike excessively at breakouts or breakdowns.

This study is an addition to FVE indicator. Indicator plots different-coloured volume bars depending on volatility.



Inputs:

AvgLength - number of bars to calculate
AlertPct - alert percent
UpColor - upvolume color
DownColor - downvolume color
NeutralColor - neutral volume color

EFS Code:

/*******************************************************************
Description	: This Indicator plots the Volatility color-coded Volume bar FVE formula
Provided By	: TS Support, LLC for eSignal
********************************************************************/

function preMain(){
    setStudyTitle("Volatility color-coded Volume Bar Formula");
    setCursorLabelName("VBF",0);
    setDefaultBarFgColor(Color.green,0);
    setCursorLabelName("VBF EMA",1);
    setDefaultBarFgColor(Color.blue,1);
    setDefaultBarThickness(2);
    setComputeOnClose();
}

var VMA = null;
var EMA_1 = 0;
VolumePlusMinusArray = new Array();

function main(AvgLength,AlertPct,Cintra,Cinter,Samples){
	if(AvgLength == null)
		AvgLength = 50;
	if(AlertPct == null)
		AlertPct = 70;
	if(Cintra == null)
		Cintra = .1;
	if(Cinter == null)
		Cinter = .1;
	if(Samples== null)
		Samples= 22;
	if(VMA == null)
		 VMA = new MAStudy(AvgLength, 0, "Volume", MAStudy.SIMPLE);
	
	var TP = 0, TP1 = 0,  MF = 0, Intra = 0, Inter = 0, Vintra = 0, Vinter = 0, CutOff = 0, i = 0;
	
	IntraArray = new Array();
	InterArray = new Array();
		
	for(i = 0; i < Samples; i++){
		IntraArray[i] = Math.log(high(-i)) - Math.log(low(-i));
		InterArray[i] = Math.log((high(-i) + low(-i) + close(-i))/3) - Math.log((high(-i-1)+ low(-i-1) + close(-i-1))/3);
	}
	
	TP = (high() + low() + close())/3;
	TP1 = (high(-1)+ low(-1) + close(-1))/3;
	
	Intra = Math.log(high()) - Math.log(low());
	Vintra = StandardDev(IntraArray,Samples);
	Inter = Math.log(TP) - Math.log(TP1);
	Vinter = StandardDev(InterArray,Samples);
	CutOff = Cintra * Vintra + Cinter * Vinter;	
	MF = (close() - (high() + low())/2)+ TP - TP1;

	if(MF > CutOff * close())
		setBarFgColor(Color.green);
	else if(MF < -1 * CutOff * close())
		setBarFgColor(Color.red);
	else
		setBarFgColor(Color.blue);
		
	return new Array(volume(),VMA.getValue(MAStudy.MA));		
}

function StandardDev(Array,Length){
	var i;
	var vSum = 0;
	var SumSqr = 0;
	var StdDev = 0;
	
	for(i = 0; i < Length; i++)
        	vSum += Array[i];

	if(Length != 0)
		for(i = 0; i < Length; i++)
			SumSqr += (Array[i] - vSum / Length) * (Array[i] - vSum / Length);

	StdDev = Math.sqrt(SumSqr / Length);
	return StdDev;
}

[TS Support]

EFS Study ##

Our next study is the Index Of Market Sentiment indicator by Viktor Likhovidov.

Volume Based > [eSignal EFS Indicators]

Download: http://share.esignal.com/download.js...r&file=ICS.efs
Download: http://share.esignal.com/download.js...likhovidov.efs

Category: Indicator > Trend Identificator

Description:

The main problem of technical indicators is the identifying a trend in its early stages.

To effectively do this, Mr. Likhovidov created an indicator called the Index of Chart Sentiment (ICS). The ICS could reach very high levels and this corresponds to an overbought market; very low values of the index correspond to an oversold market. When the index moves from lower to higher levels (period of bullish sentiment of the market) the dominant movement of the chart should be to the upside.

The algorithm for calculating the CandleCode involves a long-period analysis of the chart. But this analysis does not consist of the usual smoothing and therefore does not result in any lag.

To fing more information please refer Index Of Chart Sentiment article by Viktor Likhovidov in recent S&C issue.

Note: You MUST have both ICS.efs & bb_likhovidov.efs files in the same folder.



Inputs:

BBlength - number of bars to calculate BB
Deviations - number of StdDev to use

EFS Code:

/*******************************************************************
Description	: This Indicator plots the Index of Chart Sentiment
Provided By	: TS Support, LLC for eSignal
********************************************************************/

function preMain(){
	setStudyTitle("Index of Chart Sentiment");
	setCursorLabelName("ICS",0);
	setDefaultBarFgColor(Color.blue,0);
	setComputeOnClose();
}


var EMA1_1 = 0;
var EMA2_1 = 0;

function main(BBlength,Deviations) {
	if(BBlength == null)
		BBlength = 55
	if(Deviations == null)
		Deviations = .5
	
	var i = 0, Body = 0, ThBot_Body = 0, ThTop_Body = 0, ThBot_Ushd = 0, ThTop_Ushd = 0,
	    ThBot_Lshd = 0, ThTop_Lshd = 0, ColorCode = 0, BodyCode = 0, UshdCode = 0, LshdCode = 0,
	    BBTop = 1, BBBot = -1, EMA1 = 0, EMA2 = 0;
	
	Body = Math.abs(open() - close());
	UpperShadow = high() - Math.max(open(),close());
	LowerShadow = Math.min(open(),close()) - low();
	
	BodyArray = new Array();
	UpperShadowArray = new Array();
	LowerShadowArray = new Array();
	CandleCodeArray = new Array();
	
	for(i = 0; i < BBlength; i++){
		BodyArray[i] = Math.abs(open(-i) - close(-i));
		UpperShadowArray[i] = high(-i) - Math.max(open(-i),close(-i));
		LowerShadowArray[i] = Math.min(open(-i),close(-i)) - low(-i);
	}
	
	ThTop_Body = callFunction("bb.efs", "main", BBlength, Deviations, BodyArray, BBTop);
	ThBot_Body = callFunction("bb.efs", "main", BBlength, Deviations, BodyArray, BBBot);
	ThTop_Ushd = callFunction("bb.efs", "main", BBlength, Deviations, UpperShadowArray, BBTop);
	ThBot_Ushd = callFunction("bb.efs", "main", BBlength, Deviations, UpperShadowArray, BBBot);
	ThTop_Lshd = callFunction("bb.efs", "main", BBlength, Deviations, LowerShadowArray, BBTop);
	ThBot_Lshd = callFunction("bb.efs", "main", BBlength, Deviations, LowerShadowArray, BBBot);
	
	if(close() >= open()){
		ColorCode = 64;
		if(open() == close())
			BodyCode = 0;
       		else if(Body < ThBot_Body)
       			BodyCode = 16;
       		else if(Body < ThTop_Body)
       			BodyCode = 32;
   		else
                	BodyCode = 48;
  	}
	else{
		ColorCode = 0;
		if(Body < ThBot_Body)
               		BodyCode = 32;
		else if(Body < ThTop_Body)
               		BodyCode = 16;
    		else
              		BodyCode = 0;
	}
	if(UpperShadow == 0)
     		UshdCode = 0;
   	else if(UpperShadow < ThBot_Ushd)
        	UshdCode = 4;
   	else if(UpperShadow < ThTop_Ushd)
        	UshdCode = 8;
	else
		UshdCode = 12;

	if(LowerShadow == 0)
      		LshdCode = 3;
      	else if(LowerShadow < ThBot_Lshd)
      		LshdCode = 2;
      	else if(LowerShadow < ThTop_Lshd)
      		LshdCode = 1;
	else
		LshdCode = 0;

	CandleCode = ColorCode + BodyCode + UshdCode + LshdCode;

    	EMA1 = 2/25 * CandleCode + 23/25 * EMA1_1;
    	EMA2 = 2/25 * EMA1 + 23/25 * EMA2_1;
	if (getBarState() == BARSTATE_NEWBAR){
    		EMA1_1 = EMA1;
    		EMA2_1 = EMA2;
    	}
    
	return EMA2;
}

[TS Support]

New EFS Study

Our next study is the Bull And Bear Balance Indicator by Vadim Gimelfarb.

Volume Based > [eSignal EFS Indicators]

Download: http://share.esignal.com/download.js...c&file=bbb.efs
Download: http://share.esignal.com/download.js...bear_power.efs
Download: http://share.esignal.com/download.js...bull_power.efs

Category: Indicator > Miscellaneous

Description:

This new indicator analyzes the balance between bullish and bearish sentiment.

One can cay that it is an improved analogue of Elder Ray indicator.

To get more information please see "Bull And Bear Balance Indicator" by Vadim Gimelfarb in S&C magazine.

NOTE. Put ALL 3 efs files into the same directory!



No Inputs

EFS Code:

/*******************************************************************
Description    : This Study Plots Bull and Bear Balance Indicator (Bull Power - Bear Power)
Provided By    : TS Support, LLC for eSignal
********************************************************************/

function preMain(){
    setStudyTitle("BBB");
    setCursorLabelName("BBB",0);
    setDefaultBarFgColor(Color.red,0);
    setDefaultBarFgColor(Color.brown,1);
    setComputeOnClose();
    setPlotType(PLOTTYPE_HISTOGRAM,0);
}

function main(){
    var value = 0;
    value = callFunction("bull_power.efs", "main") - callFunction("bear_power.efs", "main");
    if(value < 0)
        setDefaultBarFgColor(Color.red,0);
    else
        setDefaultBarFgColor(Color.blue,0);
    return new Array(value,value);
}

/////////////////////////////////////////////////////////////

/*******************************************************************
Description    : This Study Plots Bull and Bear Balance Indicator (Bear Power)
Provided By    : TS Support, LLC for eSignal
********************************************************************/

function preMain(){
    setStudyTitle("BBB Bear Power");
    setCursorLabelName("Bear Power",0);
    setDefaultBarFgColor(Color.red,0);
    setComputeOnClose();
    setDefaultBarThickness(2);
}

function main(){
    
    var value = 0;
    
    if(close() < open()) 
        if(close(-1) > open()) 
            value = Math.max(close(-1) - open(), high() - low()); 
        else  
            value = high() - low(); 
    else 
        if (close() > open())
            if(close(-1) > open())  
                value = Math.max(close(-1) - low(), high() - close());
            else
                value = Math.max(open() - low(),high() - close()); 
        else 
            if(high() - close() > close() - low())
                if(close(-1) > open())  
                    value = Math.max(close(-1) - open(),high() - low());  
                else    
                    value = high() - low();
            else 
                if(high() - close() < close() - low())
                    if(close(-1) > open())
                        value = Math.max(close(-1) - low(),high() - close());
                    else         
                        value = open() - low(); 
                else
                    if(close(-1) > open())
                        value = Math.max(close(-1) - open(),high() - low()); 
                    else
                        if(close(-1) < open())
                            value = Math.max(open() - low(),high() - close()); 
                        else 
                            value = high() - low();
    return value;
}

/////////////////////////////////////////////////////////////

/*******************************************************************
Description    : This Study Plots Bull and Bear Balance Indicator (Bull Power)
Provided By    : TS Support, LLC for eSignal
********************************************************************/

function preMain(){
    setStudyTitle("BBB Bull Power");
    setCursorLabelName("Bull Power",0);
    setDefaultBarFgColor(Color.blue,0);
    setComputeOnClose();
    setDefaultBarThickness(2);
}

function main(){
    
    var value = 0;
    
    if(close() < open()) 
        if(close(-1) < open()) 
            value = Math.max(high() - close(-1), close() - low()); 
        else  
            value = Math.max(high() - open(), close() - low()); 
    else 
        if (close() > open())
            if(close(-1) > open())  
                value = high() - low();  
            else
                value = Math.max(open() - close(-1),high() - low()); 
        else 
            if(high() - close() > close() - low())
                if(close(-1) < open())  
                    value = Math.max(high() - close(-1),close() - low());  
                else    
                    value = high() - open();
            else 
                if(high() - close() < close() - low())
                    if(close(-1) > open())
                        value = high() - low();  
                    else         
                        value = Math.max(open() - close(-1),high() - low()); 
                else
                    if(close(-1) > open()) 
                        value = Math.max(high() - open(),close() - low()); 
                    else
                        if(close(-1) < open())
                            value = Math.max(open() - close(-1),high() - low()); 
                        else 
                            value = high() - low();
    return value;
} 

[Compradun]

Historic Volatility

This may not be the perfect place to post this question, but here goes anyway.

Is there an EFS that creates a line study of the historical volatility of a stock over a alterable period of time? If possible I would like to have a Mov Avg on Hist Vol as well.

I can do this in excel following this

http://www.futuresource.com/industry/hv.asp

I wish I could have it pop up on any chart I am looking at in esig...

This has nothing to do with valuation of options other than volatility can be an input in some models.

[ACM]

Compradun
You may want to check the Historical Volatility EFS that TS Support has coded and that is available here
Alex

[Compradun]

MA

Thanks Alexis,

any thoughts on how to add a moving average to the HV line?

Thanks