How to copy DataSeries to another DataSeries

[xewoox]

I like to find the HighestBar starting from High[1] to High[20].
Do I have to copy 'High' DataSeries elements (1 to 20) to another DataSeries, then pass the new DataSeries into HighestBar () function.
How do I do it?

[NinjaTrader_JoshP]

That is correct. Or you can just save the value out from the previous bar. In your previous bar just save a variable that does not get reset for when you access HighestBar().

[xewoox]

How do you copy from DataSeries? Would you be able to show the code?

[NinjaTrader_JoshP]

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

myDataSeries.Set(High[1]);
int value = HighestBar(myDataSeries, 20);

[xewoox]

myDataSeries.Set(High[1]);

Does this automatic copy High[1], High[2], High[3], High[4], High[5], ... High[19], High[20] into myDataSeries?

I don't really understand how DataSeries works? Would you try to explain further?

[xewoox]

Need a little explain

I think I got how it works because we try to put the value of the previous bar into the dataseries hence it is always one bar behind the current high.

And I would need to protect the series by

if (CurrentBar < 2)
return;

inside the OnBarUpdate().


This is neat. But would it be possible to have an optional parameter int HighestBar () or functions that uses dataSeries to specify the starting index that would be good too.

Thanks Josh

[NinjaTrader_Ben]

Hello,

You are correct. High[1] always returns the high value of one bar to the left of the current bar.

if(CurrentBar < 2) return; could be:
if(CurrentBar < 1) return;

Because all you need is one bar of history. If there are no bars to the left of the current bar yet, then do nothing.

I do not understand your last statement regarding HighestBar(). HighestBar() returns the index value of the highest bar within a range:

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

[xewoox]

I mean add an optional parameter to HighestBar. Instead of

HighestBar (IDataSeries ds, int length),

we can have

HighestBar (IDataSeries ds, int length, int startIndex),

where startIndex is 0 by default

[NinjaTrader_Ben]

Hello,

Thank you for your suggestion, I will send it to development for consideration.

You may want to use MAX(High, 20)[1] or something like that to return the highest VALUE. However, this does not return the bar INDEX with the highest value. This link will help:

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