This code does seam to update on every bar.

[Digs]

Place it on the $VOLD symbol...

Why does this not update on every bar...
#######################

function preMain() {
setPriceStudy(true);
setShowTitleParameters( false );
setShowCursorLabel(false);
setStudyTitle("VoldCode");
}

function main() {
if(getCurrentBarIndex() != 0) {
drawLineRelative(30 * -1,0, 2, 0, PS_SOLID,1, Color.black, "Zero");
}

if((getHour()*100)+getMinute() >= 930 && (getHour()*100)+getMinute() < 935) onAction1()

return null;
}

function postMain() {
}
function onAction1() {
setBarBgColor(Color.RGB(255,255,183));
}

[Doji3333]

what does not update??

I have commented your code below. I believe you are talking about the "line drawing" not working. But it makes sense if you look at the code.. You are telling it to draw only for bars != 0. 0 is always the most current bar - so this is probably your problem.

B

function preMain() {
setPriceStudy(true);
setShowTitleParameters( false );
setShowCursorLabel(false);
setStudyTitle("VoldCode");
}

function main() {

// This code is placed within a condition - getCurrentBarIndex() != 0. This mean it will run on every bar BUT the most current bar. The most current bar is the bar that is currently forming in real-time.
if(getCurrentBarIndex() != 0) {
drawLineRelative(30 * -1,0, 2, 0, PS_SOLID,1, Color.black, "Zero");
}

// this code should work from 930 to 935
if((getHour()*100)+getMinute() >= 930 && (getHour()*100)+getMinute() < 935) onAction1()

return null;
}

function postMain() {
}
function onAction1() {
setBarBgColor(Color.RGB(255,255,183));
}