Obv with a daily restart.

[Jeanmark]

Hello
I try to have a simple obv, with a daily restart ...
so I have create a variable
vdobv= "yesterday last obv"
and I return obv-vdobv but it doesn't work .
Coulld you tell where is the mistake..
Thank you

function preMain() {
 
 setPriceStudy(false);  
 setStudyTitle("OBV");  
 setCursorLabelName("OBV", 0); 
 setDefaultBarFgColor(Color.blue, 0);
 setPlotType(PLOTTYPE_LINE,0);
 setDefaultBarThickness(1,0);
}
var vobv = null;
var vdobv = null;

function main() { 
   vdobv = obv(-1,close,inv("d"));  
   vobv =  obv() - vdobv; 
   return vobv;
} 

[ckryza]

A slightly different approach should do it.

Chris

function preMain() {
 
 setPriceStudy(false);  
 setStudyTitle("OBV");  
 setCursorLabelName("OBV", 0); 
 setDefaultBarFgColor(Color.blue, 0);
 setPlotType(PLOTTYPE_LINE,0);
 setDefaultBarThickness(1,0);
}

var vobv     = null;
var nLast    = 0;
var nStudy1 = null;
var bInit     = false;

function main() { 

    if ( bInit == false ) {
    
        nStudy1 = obv();
        
        bInit = true;
        
    }
    
    if ( getBarState()==BARSTATE_NEWBAR ) {
        
        if ( getDay(0) != getDay(-1) ) {
            nLast = nStudy1.getValue(-1);
        }
        
    }
        
    vobv = nStudy1.getValue(0) - nLast;

   return vobv;
} 

[Jeanmark]

Thank you ,its working.