Calculating 3 day H/L Question?

[jphillips9]

I've modified one of the previous day OHLC studies so that it just gets the High & Low successfully.

The question I have is how do I get it to just return the highest high and lowest low of the last 3 days? Right now it just gets the High/Low from 3 days ago.

Thanks,
jphillips

Here is the code -

function preMain() {
    setPriceStudy(true);
    setStudyTitle("3DayH-L");
    setCursorLabelName("3D-H", 0); // High
    setCursorLabelName("3D-L", 1); // Low

    setDefaultBarStyle(PS_SOLID, 0); // High  
    setDefaultBarStyle(PS_SOLID, 1); // Low   

    setDefaultBarFgColor(Color.grey, 1);    // High  
    setDefaultBarFgColor(Color.maroon, 2);    // Low   

    setDefaultBarThickness(3, 0); // High  
    setDefaultBarThickness(3, 1); // Low   

    setPlotType(PLOTTYPE_FLATLINES, 0);    // High  
    setPlotType(PLOTTYPE_FLATLINES, 1);    // Low   
}

var bInit = false;
var xHigh  = null;
var xLow   = null;

function main() {
    
    if(isMonthly() || isWeekly() || isDaily())
    return;
    
    if(bInit == false){
        xHigh  = high(inv("D"));
        xLow   = low(inv("D"));
        bInit = true;
    }
    
    var vHigh  = xHigh.getValue(-3);
    var vLow   = xLow.getValue(-3);
    if(vHigh == null || vLow == null)
    return;
    
    
    return new Array (vHigh,vLow);
} 

[eSignal_JasonK]

Hello jphillips,

You can use the Donchian studies to get the highest high and low low for the daily high and low series (see below). For your vHigh and vLow varialbes you just assign them to the current bar 0 value since the xHigh and xLow studies are based on 3 periods.

function main() {
    
    if(isMonthly() || isWeekly() || isDaily())
    return;
    
    if(bInit == false){
        xHigh  = upperDonchian(3, high(inv("D")));
        xLow   = lowerDonchian(3, low(inv("D")));
        bInit = true;
    }
    
    var vHigh  = xHigh.getValue(0);
    var vLow   = xLow.getValue(0);
    if(vHigh == null || vLow == null)
    return;
    
    
    return new Array (vHigh,vLow);
}