BidAskRatio.efs
File Name: BidAskRatio.efs
Description:
Analyzes Bid/Ask tick or volume data by calculating various ratios selected by the user through the Edit Studies options.
Formula Parameters:
- Analysis: Cumulative [Bar, Cumulative]
- Study Output: Ask/Bid [Ask/Bid, Ask/Total, Bid/Total, Ask-Bid]
- Source: Volume [Tick, Volume]
- Trade Volume Filter: 0 (Exlcudes trades below specified filter)
- Positive Color: blue
- Negative Color: red
- Thickness: 2
- Plot Type: Line [Line, Histogram]
Notes:
This study may only collect and display data in real time only. It will collect and display data after the study has completely loaded. A reload of the study will start the analysis over because Bid/Ask data in not exposed to EFS for historical bars.
Download File:
BidAskRatio.efs
EFS Code:
/*****************************************************************
Provided By : eSignal (c) Copyright 2004
Description: Bid/Ask Ratio
Version 2.0
Notes
*** 2.0 - 11/26/2004 ***
- Added Trade Volume Filter. Trade Volume less than the Filter
number will be excluded when Srouce is set to Volume.
- 5/27/05 - Fix for Trade Volume Filter. Wasn't properly
reseting the total at new bar.
Formula Parameters: Defaults:
Analysis Cumulative
[Bar, Cumulative]
Study Output Ask/Bid
[Ask/Bid, Ask/Total, Bid/Total, Ask-Bid]
Source Volume
[Tick, Volume]
Trade Volume Filter 0
Positive Color blue
Negative Color red
Thickness 2
Plot Type Line
[Line, Histogram]
*****************************************************************/
function preMain() {
setStudyTitle("Bid\/Ask Ratio ");
setCursorLabelName("Ask/Bid", 0);
setDefaultBarThickness(2, 0);
setShowTitleParameters(false);
addBand(1, PS_SOLID, 1, Color.black, "even");
var fp0 = new FunctionParameter("sType", FunctionParameter.STRING);
fp0.setName("Analysis");
fp0.addOption("Bar");
fp0.addOption("Cumulative");
fp0.setDefault("Cumulative");
var fp1 = new FunctionParameter("sOutput", FunctionParameter.STRING);
fp1.setName("Study Output");
fp1.addOption("Ask/Bid");
fp1.addOption("Ask/Total");
fp1.addOption("Bid/Total");
fp1.addOption("Ask-Bid");
fp1.setDefault("Ask/Bid");
var fp2 = new FunctionParameter("sSource", FunctionParameter.STRING);
fp2.setName("Source");
fp2.addOption("Tick");
fp2.addOption("Volume");
fp2.setDefault("Volume");
var fp2a = new FunctionParameter("nFilter", FunctionParameter.NUMBER);
fp2a.setName("Trade Volume Filter");
fp2a.setLowerLimit(0);
fp2a.setDefault(0);
var fp3 = new FunctionParameter("cPos", FunctionParameter.COLOR);
fp3.setName("Positive Color");
fp3.setDefault(Color.blue);
var fp4 = new FunctionParameter("cNeg", FunctionParameter.COLOR);
fp4.setName("Negative Color");
fp4.setDefault(Color.red);
var fp5 = new FunctionParameter("nThickness", FunctionParameter.NUMBER);
fp5.setName("Thickness");
fp5.setDefault(2);
var fp6 = new FunctionParameter("sPlotType", FunctionParameter.STRING);
fp6.setName("Plot Type");
fp6.addOption("Line");
fp6.addOption("Histogram");
fp6.setDefault("Line");
}
var nAsk = null;
var nBid = null;
var nRet = 1;
var aReturn = new Array(1); // return array;
// Volume
var nBidVol = 0;
//var nInsideVol = 0;
var nAskVol = 0;
var nTotalVol = 0;
var vVol = null;
var bPrimed = false;
// Tick
var nBidTick = 0;
//var nInsideTick = 0;
var nAskTick = 0;
var nTotalTick = 0;
var bEdit = true;
function main(sType, sOutput, sSource, nFilter, cPos, cNeg, nThickness, sPlotType) {
if (bEdit == true) {
setStudyTitle("BidAskRatio: " + sOutput + ": " + sSource + " (" + sType + ")");
setDefaultBarThickness(nThickness, 0);
setCursorLabelName(sOutput, 0);
if (sPlotType == "Histogram") setPlotType(PLOTTYPE_HISTOGRAM, 0);
if (sOutput == "Ask-Bid") {
addBand(0, PS_SOLID, 1, Color.black, "even");
nRet = 0;
}
bEdit = false;
}
if (getCurrentBarIndex() < 0) return nRet;
var nState = getBarState();
if (sSource == "Volume") {
if (nState == BARSTATE_NEWBAR) {
vVol = 0;
if (sType == "Bar" || getDay(0) != getDay(-1)) {
nBidVol = 0;
//nInsideVol = 0;
nAskVol = 0;
vVol = 0;
nTotalVol = 0;
aReturn[0] = 0;
}
}
var vPrevVol = 0;
if (vVol != 0 && bPrimed == true) vPrevVol = vVol;
var nTempAsk = getMostRecentAsk();
var nTempBid = getMostRecentBid();
if (nTempAsk != null && nTempAsk != 0) nAsk = nTempAsk;
if (nTempBid != null && nTempBid != 0) nBid = nTempBid;
var vClose = close();
vVol = volume();
var vTradeVol = vVol - vPrevVol;
if (vTradeVol < nFilter) return aReturn;
if (bPrimed == false && vVol != null) {
bPrimed = true;
return;
} else {
nTotalVol += vTradeVol;
if (vClose <= nBid) {
nBidVol += vTradeVol;
} else if (vClose >= nAsk) {
nAskVol += vTradeVol;
} /*else {
nInsideVol += vTradeVol;
}*/
}
} else if (sSource == "Tick") {
if (nState == BARSTATE_NEWBAR) {
if (sType == "Bar" || getDay(0) != getDay(-1)) {
nBidTick = 0;
//nInsideTick = 0;
nAskTick = 0;
nTotalTick = 0;
aReturn[0] = 0;
}
}
var nTempAsk = getMostRecentAsk();
var nTempBid = getMostRecentBid();
if (nTempAsk != null && nTempAsk != 0) nAsk = nTempAsk;
if (nTempBid != null && nTempBid != 0) nBid = nTempBid;
var vClose = close();
nTotalTick++;
if (vClose <= nBid) {
nBidTick++;
} else if (vClose >= nAsk) {
nAskTick++;
} /*else {
nInsideTick++;
}*/
}
// Return Data
var nReturn = 1;
switch (sSource) {
case "Volume" :
switch (sOutput) {
case "Ask/Bid" :
if (nBidVol == 0) nReturn = 1;
else nReturn = (nAskVol/nBidVol);
break;
case "Ask/Total" :
if (nTotalVol == 0) nReturn = 1;
else nReturn = (nAskVol/nTotalVol);
break;
case "Bid/Total" :
if (nTotalVol == 0) nReturn = 1;
else nReturn = (nBidVol/nTotalVol);
break;
case "Ask-Bid" :
nReturn = (nAskVol-nBidVol);
break;
default : nReturn = 1;
}
break;
case "Tick" :
switch (sOutput) {
case "Ask/Bid" :
if (nBidTick == 0) nReturn = 1;
else nReturn = (nAskTick/nBidTick);
break;
case "Ask/Total" :
if (nTotalTick == 0) nReturn = 1;
else nReturn = (nAskTick/nTotalTick);
break;
case "Bid/Total" :
if (nTotalTick == 0) nReturn = 1;
else nReturn = (nBidTick/nTotalTick);
break;
case "Ask-Bid" :
nReturn = (nAskTick-nBidTick);
break;
default : nReturn = 1;
}
break;
default: nReturn = 1;
}
if (nReturn >= 1) setBarFgColor(cPos, 0);
else setBarFgColor(cNeg, 0);
aReturn[0] = nReturn;
return nReturn;
}