Access bar high series throuugh button click void without UNHANDLED EXCEPTION

[marty087]

Hi,

If i build buttons with the code provided in this forum post below, how do I access indexed values of the bar series without producing an unhandled exception when accessing through the button click void?

For example the following code procuces a "Unhandled Exception : index was out of range etc,,," when the button is clicked. It seems I cant access the bar series through event driven voids.... am i missing something here?

private void OnBuyButtonClick(object sender, RoutedEventArgs rea)
{
Button button = sender as System.Windows.Controls.Button;
if (button != null)
{
Print(button.Name + " Clicked");
Print("Hiigh 3 Bars ago = "+High[3]);
}

}

http://ninjatrader.com/support/forum/showthread.php?t=95141

[NinjaTrader_Jesse]

Hello marty087,

When using out of sync events like a buttons event handler or OnRender, you would instead need to use the Get methods to get price data. One example is GetClose:

double closePrice = Bars.GetClose(barIndex);

Rather than using a BarsAgo, this uses the specific bar index. If you need to know the index from the current bar, you would likely need to store the CurrentBar from OnBarUpdate to a variable, and then use math to work out the StoredCurrentBar - BarsAgo to equal the Index.

http://ninjatrader.com/support/helpGuides/nt8/en-us/getclose.htm?zoom_highlightsub=getclose

http://ninjatrader.com/support/helpGuides/nt8/en-us/bars.htm

I look forward to being of further assistance.

[marty087]

This whole issue has been very confusing for me. I have 10k lines of code riddled with references to High[x] and Low[x] etc. But I was only getting the excpetion sometimes whereas othestimes all worked fine. I was trying to catch why and how it was working sometimes and not others and couldnt make any sense of it. One thing I know for sure is that calling a High[0] directly from a ButtomnClick void will never work.

Anyway, I changed all my code over to use the bars.get method... all working now. Thanks