edit studies Alert playSound

[James 88]

I have a study that alerts (playSound) and I'd like to be able to change the wave file in edit studies. i.e. So that I can have different sounds for different securities.

I'd be very appreciative if anyone could point me in the right direction or if you have an example study that does simillar.

Kind Regards, James

[ACM]

Re: edit studies Alert playSound

James
You can do that using a STRING type FunctionParameter in which you add all the sounds you want as options eg

var fpx = new FunctionParameter("function_parameter_name", FunctionParameter.STRING);
fpx.addOption("chimes.wav");
fpx.addOption("ding.wav");
fpx.setDefault("ding.wav"); 

Then add to the list of arguments of the main() function the name you have assigned to the FunctionParameter and use that name as the parameter of the Alert.playSound() function.
Notice that this logic is virtually the same as the one I provided you in this post.
You may also want to review the Tutorial 3: Introduction to preMain() and main() which is available in the EFS KnowledgeBase in the Help Guides and Tutorials-> Beginner Tutorials folder as it explains the FunctionParameter Object in detail
Alex

Originally posted by James 88
I have a study that alerts (playSound) and I'd like to be able to change the wave file in edit studies. i.e. So that I can have different sounds for different securities.

I'd be very appreciative if anyone could point me in the right direction or if you have an example study that does simillar.

Kind Regards, James

[James 88]

Happy New Year all

I've written/modified these two efs (inc. Alert.playSound and other FunctionParameters) and been studing the tutorials on efs over xmas. There are a few things I've taken from the tutorials and added in (eg. var bEdit/bInit, and var aStopL = new Array(21);???) which I'm not absolutely sure about yet. If any exprienced eye would care to comment on these and the quality of the studies... any development improvements I could make...I'd be very grateful.

Both are long trailing stops based off ATR; the former off the highest close and latter off a low-8ema. Please try them; seem to work ok.

James

function preMain() {
    setPriceStudy(true);
    setStudyTitle("ProfitStop(Long)");
    setShowTitleParameters(false);
    setComputeOnClose();
    
    // Formula Parameters
    var fp1 = new FunctionParameter("nATRlen", FunctionParameter.NUMBER);
        fp1.setName("ATR Periods");
        fp1.setLowerLimit(1);
        fp1.setDefault(13);
    var fp2 = new FunctionParameter("nStoplen", FunctionParameter.NUMBER);
        fp2.setName("Stop Periods");
        fp2.setLowerLimit(1);
        fp2.setUpperLimit(21);
        fp2.setDefault(13);
    var fp3 = new FunctionParameter("nThick", FunctionParameter.NUMBER);
        fp3.setName("Thickness");
        fp3.setDefault(1);
    var fp4 = new FunctionParameter("cColor", FunctionParameter.COLOR);
        fp4.setName("Color");
        fp4.setDefault(Color.red);
    var fp5 = new FunctionParameter("bAlert", FunctionParameter.BOOLEAN);
        fp5.setName("Alert");
        fp5.setDefault("true");
}

var bEdit = true;
var vATR = null;
var aStopL = new Array(21);
var bInit = false;


function main(nATRlen, nStoplen, nThick, cColor, bAlert) {
    if (bEdit == true) {
        vATR = new ATRStudy(nATRlen);
        setDefaultBarThickness(nThick);
        bEdit = false;
    }
    
    if (bInit == false) {
        setDefaultBarFgColor(cColor);
        bInit = true;
    }
    
    var nState = getBarState();
    if (nState == BARSTATE_NEWBAR) {
        aStopL.pop();
        aStopL.unshift(0);
    }
    
    var ATR = vATR.getValue(ATRStudy.ATR);
    if (ATR == null) return;
    
    var c = close();
    var vStopL = (c - (2*ATR));
    aStopL[0] = vStopL;
    
    
    var vStopxL = vStopL;
    for (var i = 0; i < nStoplen; i++) {
        vStopxL = Math.max(aStopL[i], vStopxL);
    }
    
    var nState = getBarState();
    if (close(0) < vStopxL&&bAlert==true) {
        Alert.playSound("warning.wav");
    }
    
    return vStopxL; 

function preMain() {
    setPriceStudy(true);
    setStudyTitle("MAStop(Long)");
    //setDefaultBarThickness(1, 0);
    //setDefaultBarFgColor(Color.yellow, 0);
    
    setShowTitleParameters(false);
    setComputeOnClose();
    
    // Formula Parameters
    var fp1 = new FunctionParameter("nATRlen", FunctionParameter.NUMBER);
        fp1.setName("ATR Periods");
        fp1.setLowerLimit(1);
        fp1.setDefault(13);
    var fp2 = new FunctionParameter("nMovlen", FunctionParameter.NUMBER);
        fp2.setName("MA Periods");
        fp2.setLowerLimit(1);
        fp2.setDefault(8);
    var fp2 = new FunctionParameter("nStoplen", FunctionParameter.NUMBER);
        fp2.setName("Stop Periods");
        fp2.setLowerLimit(1);
        fp2.setUpperLimit(21);
        fp2.setDefault(13);
    // Study Parameters
    var sp1 = new FunctionParameter("nThick", FunctionParameter.NUMBER);
        sp1.setName("Thickness");
        sp1.setDefault(1);
    var sp2 = new FunctionParameter("cColor", FunctionParameter.COLOR);
        sp2.setName("Color");
        sp2.setDefault(Color.yellow);
}

var bEdit = true;
var vATR = null;
var vMAL = null;
var aStopL = new Array(21);
var bInit = false;


function main(nATRlen, nMovlen, nStoplen, nThick, cColor) {
    if (bEdit == true) {
        vATR = new ATRStudy(nATRlen);
        vMAL = new MAStudy(nMovlen, 0, "Low", MAStudy.EXPONENTIAL);   
        setDefaultBarThickness(nThick);
        bEdit = false;
    }
    
    if (bInit == false) {
        setDefaultBarFgColor(cColor);
        bInit = true;
    }
    
    var nState = getBarState();
    if (nState == BARSTATE_NEWBAR) {
        aStopL.pop();
        aStopL.unshift(0);
    }
    
    var ATR = vATR.getValue(ATRStudy.ATR);
    var MAL = vMAL.getValue(MAStudy.MA);
    if (ATR == null || MAL == null) return;
    
    var vStopL = (MAL - (2*ATR));
    aStopL[0] = vStopL;
    
    var vStopxL = vStopL;
    for (var i = 0; i < nStoplen; i++) {
        vStopxL = Math.max(aStopL[i], vStopxL);
    }
    
    return vStopxL;