SmoothBollingerB.efs
EFSLibrary - Discussion Board
File Name: SmoothBollingerB.efs
Description:
Smoothing The Bollinger %b
Formula Parameters:
- %b Period : 18
- Tema Average : 8
- Standard Deviation High : 1.6
- Standard Deviation Low : 1.6
- Standard Deviation Period : 63
Notes:
The related article is copyrighted material. If you are not a subscriber of Stocks & Commodities, please visit www.traders.com.
Download File:
SmoothBollingerB.efs
EFS Code:
/*********************************
Provided By:
eSignal (Copyright c eSignal), a division of Interactive Data
Corporation. 2010. All rights reserved. This sample eSignal
Formula Script (EFS) is for educational purposes only and may be
modified and saved under a new file name. eSignal is not responsible
for the functionality once modified. eSignal reserves the right
to modify and overwrite this EFS file with each new release.
Description:
Smoothing The Bollinger %b
Version: 1.00 03/11/2010
Formula Parameters: Default:
%b Period 18
Tema Average 8
Standard Deviation High 1.6
Standard Deviation Low 1.6
Standard Deviation Period 63
Notes:
The related article is copyrighted material. If you are not a subscriber
of Stocks & Commodities, please visit www.traders.com.
**********************************/
var fpArray = new Array();
var bInit = false;
var bVersion = null;
function preMain() {
setPriceStudy(false);
setShowCursorLabel(true);
setShowTitleParameters(false);
setStudyTitle("Smoothing The Bollinger %b");
setCursorLabelName("SVE BB%b", 0);
setDefaultBarFgColor(Color.blue, 0);
setPlotType(PLOTTYPE_LINE, 0);
setDefaultBarThickness(2, 0);
setCursorLabelName("UP Level", 1);
setDefaultBarFgColor(Color.red, 1);
setPlotType(PLOTTYPE_LINE, 1);
setDefaultBarThickness(1, 1);
setCursorLabelName("Down Level", 2);
setDefaultBarFgColor(Color.red, 2);
setPlotType(PLOTTYPE_LINE, 2);
setDefaultBarThickness(1, 2);
var x=0;
fpArray[x] = new FunctionParameter("Period", FunctionParameter.NUMBER);
with(fpArray[x++]){
setName("%b Period");
setLowerLimit(1);
setUpperLimit(100);
setDefault(18);
}
fpArray[x] = new FunctionParameter("TeAv", FunctionParameter.NUMBER);
with(fpArray[x++]){
setName("Tema Average");
setLowerLimit(1);
setUpperLimit(30);
setDefault(8);
}
fpArray[x] = new FunctionParameter("afwh", FunctionParameter.NUMBER);
with(fpArray[x++]){
setName("Standard Deviation High");
setLowerLimit(0.1);
setUpperLimit(5);
setDefault(1.6);
}
fpArray[x] = new FunctionParameter("afwl", FunctionParameter.NUMBER);
with(fpArray[x++]){
setName("Standard Deviation Low");
setLowerLimit(0.1);
setUpperLimit(5);
setDefault(1.6);
}
fpArray[x] = new FunctionParameter("afwper", FunctionParameter.NUMBER);
with(fpArray[x++]){
setName("Standard Deviation Period");
setLowerLimit(1);
setUpperLimit(200);
setDefault(63);
}
}
var xSVE_BB = null;
var xStdev_SVE_BB = null;
function main(Period, TeAv, afwh, afwl, afwper) {
var nBarState = getBarState();
var nSVE_BB = 0;
var nStdev_SVE_BB = 0;
var nHLevel = 0;
var nLLevel = 0;
if (bVersion == null) bVersion = verify();
if (bVersion == false) return;
if (nBarState == BARSTATE_ALLBARS) {
if (Period == null) Period = 18;
if (TeAv == null) TeAv = 8;
if (afwh == null) afwh = 1.6;
if (afwl == null) afwl = 1.6;
if (afwper == null) afwper = 63;
}
if (!bInit) {
addBand(50, PS_SOLID, 1, Color.blue, "Middle Line");
xSVE_BB = efsInternal("Calc_SVE_BB", Period, TeAv);
xStdev_SVE_BB = efsInternal("StdDev", xSVE_BB, afwper);
bInit = true;
}
nSVE_BB = xSVE_BB.getValue(0);
nStdev_SVE_BB = xStdev_SVE_BB.getValue(0);
if (nSVE_BB == null || nStdev_SVE_BB == null) return;
nHLevel = 50 + afwh * nStdev_SVE_BB;
nLLevel = 50 - afwl * nStdev_SVE_BB;;
return new Array(nSVE_BB, nHLevel, nLLevel);
}
var bSecondInit = false;
var xOHLC4 = null;
var xhaClose = null;
var xhaC = null;
var xTMA1 = null;
var xTMA2 = null;
var xDiff = null;
var xZlHA = null;
var xTemaZlHA = null;
var xStdevTemaZlHA = null;
var xWMATemaZlHA = null;
function Calc_SVE_BB(Period, TeAv) {
var nTemaZlHA = 0;
var nStdevTemaZlHA = 0;
var nWMATemaZlHA = 0;
var nRes = 0;
if (bSecondInit == false) {
xOHLC4 = ohlc4();
xhaOpen = efsInternal("Calc_haOpen", xOHLC4);
xhaC = efsInternal("Calc_haC", xOHLC4, xhaOpen);
xTMA1 = efsInternal("TEMA", xhaC, TeAv);
xTMA2 = efsInternal("TEMA", xTMA1, TeAv);
xDiff = efsInternal("Calc_Diff", xTMA1, xTMA2);
xZlHA = efsInternal("Calc_ZlHA", xTMA1, xDiff);
xTemaZlHA = efsInternal("TEMA", xZlHA, TeAv);
xStdevTemaZlHA = efsInternal("StdDev", xTemaZlHA, Period);
xWMATemaZlHA = wma(Period, xTemaZlHA);
bSecondInit = true;
}
nTemaZlHA = xTemaZlHA.getValue(0);
nStdevTemaZlHA = xStdevTemaZlHA.getValue(0);
nWMATemaZlHA = xWMATemaZlHA.getValue(0);
nRes = (nTemaZlHA + 2 * nStdevTemaZlHA - nWMATemaZlHA) / (4 * nStdevTemaZlHA) * 100;
if (nRes == null) return;
return nRes;
}
var xEMA1 = null;
var xEMA2 = null;
var xEMA3 = null;
var bInitTEMA = false;
function TEMA(xPrice, Length) {
var nTEMA = 0;
if ( bInitTEMA == false ) {
xEMA1 = ema(Length, xPrice);
xEMA2 = ema(Length, xEMA1);
xEMA3 = ema(Length, xEMA2);
bInitTEMA = true;
}
if (xEMA1.getValue(0) == null || xEMA2.getValue(0) == null || xEMA3.getValue(0) == null) return;
nTEMA = 3 * xEMA1.getValue(0) - 3 * xEMA2.getValue(0) + xEMA3.getValue(0);
return nTEMA;
}
function Calc_haOpen(xOHLC4) {
var nRes1 = 0;
var nRef = ref(-1);
if (nRef == null) nRef = 1;
nRes1 = (nRef + xOHLC4.getValue(-1)) / 2 ;
if (nRes1 == null) return;
return nRes1;
}
function Calc_haC(xOHLC4, xhaOpen) {
var nRes2 = 0;
nRes2 = (xOHLC4.getValue(0) + xhaOpen.getValue(0) + Math.max(high(0), xhaOpen.getValue(0)) + Math.min(low(0), xhaOpen.getValue(0))) / 4;
if (nRes2 == null) return;
return nRes2;
}
function Calc_Diff(xTMA1, xTMA2) {
var nRes = 0;
nRes = xTMA1.getValue(0) - xTMA2.getValue(0);
if (nRes == null) return;
return nRes;
}
function Calc_ZlHA(xTMA1, xDiff) {
var nRes = 0;
nRes = xTMA1.getValue(0) + xDiff.getValue(0);
if (nRes == null) return;
return nRes;
}
function StdDev(DataArray, Period) {
var sum = 0;
var avg = 0;
var nRes = 0;
for (var barsBack = Period-1; barsBack >= 0; barsBack--) {
sum += DataArray.getValue(-barsBack);
}
avg = sum / Period;
sum = 0;
for (var barsBack = Period - 1; barsBack >= 0; barsBack--) {
sum += (DataArray.getValue(-barsBack) - avg) * (DataArray.getValue(-barsBack) - avg);
}
nRes = Math.sqrt(sum / Period);
return nRes;
}
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|Text.RELATIVETOLEFT|Text.BOLD|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.BOLD|Text.LEFT,
null, 13, "upgrade");
return b;
} else {
b = true;
}
return b;
}