Get Opening market price

[skynetman]

I want to get the price at a given time, in the example 11:30 (opening of the market ).
My code does not work....

private DataSeries myDataSeries; //in variables
.....

myDataSeries = new DataSeries(this); //in initialize method
.....
int BarsAgoOpenPrice = Bars.GetBar(new DateTime(2008,04,14,11,30,0,0));
OpenPrice = Close [BarsAgoOpenPrice];

Do i have also to check with myDataSeries.ContainsValue(BarsAgoOpenPrice) if there is a value?
Thx

[NinjaTrader_Dierk]

GetBar returns the absolute index of a bar and not the "barsAgo" index which you would need to stuff into Close[barsAgo].

[skynetman]

So what can i use with getbar to have the price?

[NinjaTrader_Dierk]

You need to apply some math to convert the absolute index to the barsAgo index like (pseudo code):
int barsAgo = CurrentBar - GetBar(new DateTime(2008,04,14,11,30,0,0))

http://www.ninjatrader-support.com/HelpGuideV6/GetBar.html