Best method to fetch prior data of another interval

[giogio1]

I have an indicator that works with ticks or one minutes bars interval and that from the start (first bars) needs to fetch the prior 60*100 minutes (i.e 100 bars of a 60minute interval) as BarsArray[1].
What's the best approach to achieve this?
Thank you.
Gio

[NinjaTrader_Gaby]

Hello giogio1,

Thank you for your post.

What data specifically are you trying to obtain? For example, if you want Price data like the Close price of the added series you can use the Closes collection.

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

Closes[1][0] is the Close price of the currently processing bar (0 bars ago) in the secondary series (BarsArray[1]).
Closes[1][100] is the Close price 100 bars ago from the secondary series.

Please let me know if this doesn't guide you in the right direction.

[giogio1]

Thank you Gaby, I meant something different, sorry for not being clear.
I have a 100 ticks chart and I am at the begiinning of the chart,, say bar 10 which I get with Closes[0][10]
From that point I need to load another BarsArray and get the previous 100 bars of 60 minutes.
If I code Closes[1][100] I would get out of boundary array error, because it never loaded 100 bars back, unless I load many days back of tick data and I also wouldn't get, I think , the necessary flexibility. Correct if I am wrong.
In the past with NT7 I could use the iBar class but it is undocumented and I cannot convert it NT8 the same way.
Can you give me a lead?
Best
Gio

[NinjaTrader_Gaby]

Hello giogio1,

Thank you for your response.

Correct, if you wanted to obtain the 100th bar from the secondary series while also accessing the 10th bar from the primary series, you would need to use that both of those bars have already been processed by the strategy. You would also need to make sure the chart you are applying to has over 100 bars worth of data in order for the strategy to process that data. When using AddDataSeries, there is no workaround for this.

You could use a BarsRequest to simply request the amount of barsBack worth of data you want for another series, however note that the data requested is not synchronized with an indicator's primary data series. You will need to implement your own BarsUpdateEvent logic. You would also not be able to use this data as input for an indicator.

All data also must requested by barIndex, not by barsAgo values using methods like GetClose(). So if you wanted to obtain the value 100 bars ago, you would need to know the barIndex of that bar.

https://ninjatrader.com/es/support/helpGuides/nt8/barsrequest.htm

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

[giogio1]

Thank you very much Gaby! I'll work calmly on the Asynch'd BarsRequest solution.