DDE Question

[waynecd]

FWIW, since I coded for the previous individual bid/ask value as well, I'm posting the completed efs.

function preMain() {
    //setStudyTitle("Bid/Ask Volume ");
    setCursorLabelName("Ask Vol", 0);
    setCursorLabelName("Inside Vol", 1);
    setCursorLabelName("Bid Vol", 2);
    setDefaultBarFgColor(Color.green, 0);
    setDefaultBarFgColor(Color.black, 1);
    setDefaultBarFgColor(Color.red, 2);
    setDefaultBarThickness(8, 0);
    setDefaultBarThickness(6, 1);
    setDefaultBarThickness(4, 2);
    setPlotType(PLOTTYPE_HISTOGRAM, 0);
    setPlotType(PLOTTYPE_HISTOGRAM, 1);
    setPlotType(PLOTTYPE_HISTOGRAM, 2);

    var fp0 = new FunctionParameter("sType", FunctionParameter.STRING);
    fp0.setName("Analysis");
    fp0.addOption("Bar");
    fp0.addOption("Cumulative");
    fp0.setDefault("Bar");
}

var nBidVol = null;
var nInsideVol = null;
var nAskVol = null;
var nBidVol_1 = null;
var nInsideVol_1 = null;
var nAskVol_1 = null;
var vVol = null;
var bPrimed = false;
var nAsk = null;
var nBid = null;
var bEdit = true;
var ddeup = null;
var ddedown = null;
var ddeInside = null;
var ddeup_1 = null;
var ddedown_1 = null;
var ddeInside_1 = null;
var ddeup_1Tick = null;
var ddedown_1Tick = null;
var ddeInside_1Tick = null;
var vTradeVol_1 = null;
var nBidVol_LastTick = null;
var nInsideVol_LastTick = null;
var nAskVol_LastTick = null;

function main(sType) {
    var vPrevVol = null;
    var nTempAsk = null;
    var nTempBid = null;
    if (getCurrentBarIndex() < 0) return;

    if (bEdit == true) {
        var symb = getSymbol();
        symb = symb.replace(" #F", "");
        symb = symb.replace(" ", "_");debugPrintln("symb; "+symb);
        ddeup = new DDEOutput(symb + "ask0_" + getInterval());
        ddedown = new DDEOutput(symb + "bid0_" + getInterval());
        ddeInside = new DDEOutput(symb + "Inside0_" + getInterval());
        ddeup_1 = new DDEOutput(symb + "ask1_" + getInterval());
        ddedown_1 = new DDEOutput(symb + "bid1_" + getInterval());
        ddeInside_1 = new DDEOutput(symb + "Inside1_" + getInterval());
        ddeup_1Tick = new DDEOutput(symb + "ask1T_" + getInterval());
        ddedown_1Tick = new DDEOutput(symb + "bid1T_" + getInterval());
        ddeInside_1Tick = new DDEOutput(symb + "Inside1T_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "ask0_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "bid0_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "Inside0_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "ask1_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "bid1_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "Inside1_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "ask1T_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "bid1T_" + getInterval());
        debugPrintln("Example DDE link: '=eSignal|EFS!" + symb + "Inside1T_" + getInterval());
        bEdit = false;
    }
    var nState = getBarState();
    if (nState == BARSTATE_NEWBAR) {
        if (sType == "Bar" || day(0) != day(-1)) {//resets values to 0
            nBidVol = 0;
            nInsideVol = 0;
            nAskVol = 0;
            nBidVol_1 = 0;
            nInsideVol_1 = 0;
            nAskVol_1 = 0;
        }
        vVol = 0;
    }

    if (vVol != null && bPrimed == true) vPrevVol = vVol;

    nTempAsk = getMostRecentAsk();
    nTempBid = getMostRecentBid();
    if (nTempAsk != null && nTempAsk != 0) nAsk = nTempAsk;
    if (nTempBid != null && nTempBid != 0) nBid = nTempBid;

    var vClose = close(0);
    vVol = volume(0);
    var vTradeVol = vVol - vPrevVol;//changed "vTradeVol" to global scope

    if (bPrimed == false && vVol != null) {
        bPrimed = true;
        return;
    } else {
        if (vClose <= nBid) {

            nBidVol_1 = nBidVol;//previous cummulative bid value
            nBidVol += vTradeVol;//current cummulative bid value
            nBidVol_LastTick = vTradeVol_1;//previous single bid value
//for every bar each of these with "+=" adds the previous total to the incoming value and 
//all are reset above under the code with "BARSTATE_NEWBAR"
        } else if (vClose >= nAsk) {
            nAskVol_1 = nAskVol;//previous cummulative ask value
            nAskVol += vTradeVol;//current cummulative ask value
            nAskVol_LastTick = vTradeVol_1;//previous single ask value
        } else {
            nInsideVol_1 = nInsideVol;//previous cummulative inside value
            nInsideVol += vTradeVol;//current cummulative inside value
            nInsideVol_LastTick = vTradeVol_1;//previous single inside value
        }
    }
    if (nAskVol != null) ddeup.set(nAskVol);
    if (nBidVol != null) ddedown.set(nBidVol);
    if (nInsideVol != null) ddeInside.set(nInsideVol);
    if (nAskVol_1 != null) ddeup_1.set(nAskVol_1);
    if (nBidVol_1 != null) ddedown_1.set(nBidVol_1);
    if (nInsideVol_1 != null) ddeInside_1.set(nInsideVol_1);
    if (nAskVol_LastTick != null) ddeup_1Tick.set(nAskVol_LastTick);
    if (nBidVol_LastTick != null) ddedown_1Tick.set(nBidVol_LastTick);
    if (nInsideVol_LastTick != null) ddeInside_1Tick.set(nInsideVol_LastTick);
//debugPrintln("0000:  "+nAskVol+", "+nInsideVol+", "+nBidVol);
//debugPrintln("1111:  "+nAskVol_1+", "+nInsideVol_1+", "+nBidVol_1);
//debugPrintln("2222:  "+nAskVol_LastTick+", "+nInsideVol_LastTick+", "+nBidVol_LastTick);
    vTradeVol_1 = vTradeVol;//added to capture last "vTradeVol"

    return new Array(nAskVol, nInsideVol, nBidVol);
} 

Wayne