Draw an ArrowUp fails with a strange exceprion

[SuneSorgenfrei]

Hi
I have run into an issue when trying to draw an ArrowUp from a button press event.
I have created a custom button and on click it is firing of the below method:

protected void Button1Click(object sender, RoutedEventArgs e)
{
int lowestBar = LowestBar(Low, -10);
double low = Low[lowestBar];

Draw.ArrowUp(this, CurrentBar+"", false,2, Low[0]-TickSize*5, Brushes.Green);

ForceRefresh();
}

Now i get an rather strange exceptin telling me that "barsago" need to be between 0 and 4872 but it is 1.
In my best understanding 1 is between 0 and the other number.

Please see the attached image.

Best Regards,
Sune

[NinjaTrader_ChelseaB]

Hello SuneSorgenfrei,

The button click is run from a non-data-driven method.

You will need to use TriggerCustomEvent() to synchronize the series first.

https://ninjatrader.com/support/helpGuides/nt8/triggercustomevent.htm

https://support.ninjatrader.com/s/article/Chart-Order-Buttons

[SuneSorgenfrei]

Hi Chelsea
Thank you very much, that solved the issue and taught me something new so a win win situation.

Best Regards,
Sune