RSI_w_Bands.efs
File Name: RSI_w_Bands.efs
Description:
Displays RSI with Bollinger Bands appliedto the RSI study.
Formula Parameters:
- nRSILength - Length of RSI (Default: 14)
- nRSISource - Source for RSI (Default: "Close")
- nBandLength - Length of Bollinger Bands (Default: 50)
- nStdDev - Standard Deviations for BB (Default: 2.1)
Notes:
Valid inputs for nRSISource: Open, High, Low, Close, HL/2, HLC/3 and OHLC/4
Download File:
RSI_w_Bands.efs
EFS Code:
/************************
Copyright © eSignal, 2003
*************************
Description: Displays RSI with Bollinger Bands applied
to the RSI study.
Inputs:
nRSILength - Length of RSI (Default: 14)
nRSISource - Source for RSI (Default: "Close")
nBandLength - Length of Bollinger Bands (Default: 50)
nStdDev - Standard Deviations for BB (Default: 2.1)
*/
var study = null;
var study2 = null;
function preMain() {
setStudyTitle("RSI w/ Bands");
setCursorLabelName("Upper",0);
setCursorLabelName("Basis",1);
setCursorLabelName("Lower",2);
setCursorLabelName("RSI",3);
setDefaultBarFgColor(Color.blue,0);
setDefaultBarFgColor(Color.red,1);
setDefaultBarFgColor(Color.blue,2);
setDefaultBarFgColor(Color.aqua,3);
}
function main(nRSILength,nRSISource,nBandLength,nStdDev) {
if (nRSILength == null) nRSILength = 14;
if (nRSISource == null) nRSISource = verifySource(nRSISource);
if (nBandLength == null) nBandLength = 50;
if (nStdDev == null) nStdDev = 2.1;
if (study == null) study = new RSIStudy(nRSILength, nRSISource);
if (study2 == null) study2 = new BollingerStudy(nBandLength, study, RSIStudy.RSI, nStdDev)
var vRSI = study.getValue(RSIStudy.RSI);
var vUpper = study2.getValue(BollingerStudy.UPPER);
var vBasis = study2.getValue(BollingerStudy.BASIS);
var vLower = study2.getValue(BollingerStudy.LOWER);
return new Array(vUpper, vBasis, vLower, vRSI);
}
/*** Utility Function ***/
// Verifies source input and returns valid source
function verifySource(nSource) {
if (nSource == "close" || nSource =="C" ||
nSource =="Close" || nSource =="c") {
nSource = "Close";
} else if (nSource == "open" || nSource =="O" ||
nSource =="Open" || nSource =="o") {
nSource = "Open";
} else if (nSource == "high" || nSource =="H" ||
nSource == "High" || nSource == "h") {
nSource = "High";
} else if (nSource == "low" || nSource =="L" ||
nSource =="Low" || nSource =="l") {
nSource = "Low";
} else if (nSource == "hl/2" || nSource =="HL2" ||
nSource =="HL/2" || nSource =="hl2") {
nSource = "HL/2";
} else if (nSource == "hlc/3" || nSource =="hlc3" ||
nSource =="HLC/3" || nSource =="HLC3") {
nSource = "HLC/3";
} else if (nSource == "ohlc/4" || nSource =="ohlc4" ||
nSource =="OHLC/4" || nSource =="OHLC4") {
nSource = "OHLC/4";
} else {
nSource = "Close";
}
return nSource;
}