Last Bar Computations

[AssetHound]

If I'm using setComputeOnClose(true), how do I force a final calculation for bar(0) after the last tick has arrived for the day -- regardless of the time interval selected?

I was processing every tick, but that's a bit too much data to handle due to the frequency of the ticks.

Thanks.

[eSignal_JasonK]

Hello AssetHound,

With the use of setComputeOnClose() a formula will only execute once each time a bar closes. To force an execution of main() or another user-defined function within your formula can only be done manually. You could draw a button on the chart that executes the function when clicked. Concatenate to the text parameter of the drawTextRelative() function the following highlighted string.

drawTextRelative( barIndex, yValue, text + "@URL=EFS:yourFunctionName", fgColor, bgColor, Flags, fontName, fontSize [, tagID] [, cx] [, cy] )

[AssetHound]

Hmmm. I was afraid you would say that. I'll give this a try later today, but it seems I would still have the problem with the bar(0) data since that last bar isn't "closed". Wouldn't this be the same as reloadEFS()? If so, I could just wait until the market closed and then reload which I could do in the program. Thanks.

---------

Originally posted by JasonK
Hello AssetHound,

With the use of setComputeOnClose() a formula will only execute once each time a bar closes. To force an execution of main() or another user-defined function within your formula can only be done manually. You could draw a button on the chart that executes the function when clicked. Concatenate to the text parameter of the drawTextRelative() function the following highlighted string.

drawTextRelative( barIndex, yValue, text + "@URL=EFS:yourFunctionName", fgColor, bgColor, Flags, fontName, fontSize [, tagID] [, cx] [, cy] )

[eSignal_JasonK]

Hello AssetHound,

There isn't a method to detect when the last bar closes in EFS while using setComputeOnClose(), which is why this last calculation update has to be done manually. When you see visually that the interval is over you can click the button and the calculation in your user-defined function can use the data from bar 0 even with setComputeOnClose(). Try the following example.

function preMain() {
    setStudyTitle("test");
    setPriceStudy(true);
    setComputeOnClose();
}

var bInit = false;

function main() {
    if (getCurrentBarIndex() == -1 && bInit == false) {
        drawTextRelative( 20, 20, "test@URL=EFS:calc", Color.blue, Color.grey, 
            Text.BUTTON|Text.RELATIVETOBOTTOM|Text.RELATIVETOLEFT, 
            null, 12, "test" );
        bInit = true;
    }
    return;
}

function calc() {
    debugPrintln(getCurrentBarIndex() + "  " + close(0));
    return;
} 

[AssetHound]

This was a great help. I was trying your suggestion, and just about had this done -- but this will save me a little time. Thanks.
---------

Originally posted by JasonK
Hello AssetHound,

There isn't a method to detect when the last bar closes in EFS while using setComputeOnClose(), which is why this last calculation update has to be done manually. When you see visually that the interval is over you can click the button and the calculation in your user-defined function can use the data from bar 0 even with setComputeOnClose(). Try the following example.

function preMain() {
    setStudyTitle("test");
    setPriceStudy(true);
    setComputeOnClose();
}

var bInit = false;

function main() {
    if (getCurrentBarIndex() == -1 && bInit == false) {
        drawTextRelative( 20, 20, "test@URL=EFS:calc", Color.blue, Color.grey, 
            Text.BUTTON|Text.RELATIVETOBOTTOM|Text.RELATIVETOLEFT, 
            null, 12, "test" );
        bInit = true;
    }
    return;
}

function calc() {
    debugPrintln(getCurrentBarIndex() + "  " + close(0));
    return;
} 

[eSignal_JasonK]

You're most welcome.

[The Toad]

Just to verify if you will, when using setComputeOnClose(), and it is decision time in the efs, would close(0) or close(-1) hold the value of the bar that just closed?

I hope that makes sense.

Thanks

[ACM]

The Toad
When using setComputeOnClose() it would be close(0)
Alex

[AssetHound]

Well, now I'm confused. if setComputeOnClose() is being used, the current bar is still being formed and that bar is the (0) bar. The bar that just closed -- i.e., no more trades -- is bar (-1), I thought, since the bar (0) is still in process.

If you are not using setComputeOnClose(), that essentially means you are processing each trade and main will reevaluate the current bar (0) with each new trade.

--------------

Originally posted by Alexis C. Montenegro
The Toad
When using setComputeOnClose() it would be close(0)
Alex

[ACM]

AssetHound
I believe Jason provided an explanation of how it works in this post.
Anyhow this can be easily verified by running the enclosed script in real time (or playback) on an intraday chart. You should see that close(0) and open(0) refer to the last processed bar (ie at bar index -1)
Alex

function preMain(){
    setComputeOnClose();
}

function main(){
    if(close(0)>open(0)) setBarBgColor(Color.yellow);
    return close(0);
}