How to set an alert to go off only once per bar?

[Trader273]

I have a visual and audio alert that goes off when a certain condition is met. However, when the criteria are met it goes off evey tick. I only need this to go off once when the criteria is met. Below is what I attempted to do in order to accoplish this. This did not work, any suggestions would be appreciated.

var LastRawtime;
nVol1 = volume(0);
nVol2 = volume(-1);

nDif = ( nVol1-nVol2 ) / nVol2;
if(getValue("rawtime",0)!=LastRawtime){
if ( nDif >= nPct ) {

setDefaultBarFgColor( fColor1, 0 );
Alert.playSound("laser2.wav");
Alert.addToList(getSymbol(), "BLUE VOLUME BAR - LOOK FOR TRADE !!",Color.black, Color.RGB(0,0,255));
LastRawtime = getValue ("rawtime",0);


-Nick

[eSignal_JasonK]

Hello Nick,

Please review the AlertOncePerBar.efs formula example in our EFS Library.

[Trader273]

Jason,
I added what I saw in that EFS, but still no luck. I enclosed a condensed version of my code. Any ideas??

function preMain() {
var vFlag= false;


nDif = ( nVol1-nVol2 ) / nVol2;
if ( nDif >= nPct && vFlag == false ) {
setDefaultBarFgColor( fColor1, 0 ); 
Alert.addToList(getSymbol(), "BLUE VOLUME BAR - LOOK FOR    
       TRADE !!",Color.black, Color.RGB(0,0,255));
vFlag = true; 

Thanks in advance
Nick

[eSignal_JasonK]

Hello Nick,

The code you have posted is incomplete. You don't have a main() function for starters. I would suggest you start with the code example I pointed you to and then add your alert to that code. Give that a shot and if you still have trouble, post your complete formula here.

[Trader273]

Jason,
Sorry, I thought only posting the part I was trying to modify would be easier. I have attached my code below. I tried everything I could think of, but still not working. Any help is appreciated.

Thanks,
Nick

[ACM]

Nick
FWIW I ran the efs you posted and as far as I can see it is triggering the alert only once per bar.
Alex

[Trader273]

After seein gyour message Alex, I decided to restart esignal and the EFS seems to be working how i thought it would. Thank you Jason and Alex for your help.


-Nick