Accessing Historical Values from AddPlot

[habibalex]

I have a plot I have added to my indicator AddPlot(new Stroke(Brushes.AliceBlue, 0), PlotStyle.Dot, "Buys");

When State == State.RealTime in the OnStateChange() method I am trying to access historical values of the Buys Series but I am getting argumentOutOfRange exceptions. The Count is > 0. Why is this throwing an error?

[NinjaTrader_ChrisL]

Hello habibalex, thanks for writing in.

There should not be any access to any Series<T> object before data starts processing. If you need to iterate through all of the historical values, it should be done in OnBarUpdate when State == State.Historical. By the time State == State.RealTime, the indicator would have ran through every bar on the chart.

Please let me know if I can assist any further.

[habibalex]

When State == State.RealTime, I thought all processing is complete? I am doing a BarsRequest when State == State.RealTime to process tick data for the current day. I cannot use TickReplay or Add 1 Tick Data series, as I need to load about 180 days of minute data on the chart. I only need tick data for the last couple days so that is why I am using a BarsRequest.

[NinjaTrader_ChrisL]

Hello habibalex, thanks for your reply.

I was able to get the data from the list by using GetValueAt() on the series. Can you test the script I attached to see if this will work for you?

I look forward to assisting.

[habibalex]

Yes GetValueAt works. Values[0][i] does not work for i > 0. i need to SET the values, not get them

[NinjaTrader_ChrisL]

Hello habibalex, thanks for your reply.

This worked for me:

for (int i = 0; i < Values[0].Count-1; i++)
{
    Values[0][i] = -100;
    Print(Values[0].GetValueAt(i));
}

Please let me know if this does not resolve your inquiry.

[habibalex]

That still is not working for me. I am in the State.RealTime when I do the BarsRequest

barsRequest.Request(new Action<BarsRequest, ErrorCode, string>((bars, errorCode, errorMessage) =>
{
    if (errorCode != ErrorCode.NoError)
    {
    // Handle any errors in requesting bars here
    //NinjaTrader.Code.Output.Process(string.Format("Err or on requesting bars: {0}, {1}", errorCode, errorMessage), PrintTo.OutputTab1);
        return;
    }


    try{
        completeProcessing(bars.Bars, startAVPTime);
    }
    catch(Exception ex){
        Print(ex.Message + " Delta_Regression.cs");
    }
    for (int i = closeD.Count - 1, j = 0; i > 0; i--, j++)
    {
        Print("getBars: " + i + " " + j);
        Values[0][j] = closeD[i];
    }

    dataRequestState = 1;
}));

[NinjaTrader_ChrisL]

Hello habibalex, thanks for your reply.

What values are 'j' and 'i' getting up to versus the size of the closeD array? It's a indexing error being experienced that will need to be found through printing these values.

I look forward to hearing of your results.

[habibalex]

I updated the code above to have a print statement, it prints 0 fine, but fails on 1
getBars: 25892 0
getBars: 25891 1

[NinjaTrader_ChrisL]

Hello habibalex, thanks for your reply.

Could you send me an example script to platformsupport at ninjatrader.com? Please Export the script and attach it to your email, referencing "Attn ChrisL 2792451" in the body of the email. Please make sure the test script does not include any third party scripts so I will be able to compile it properly.

I look forward to hearing from you.

[NinjaTrader_ChrisL]

Hello habibalex, thanks for your patience.

I am still testing your script. I should have a reply to you today after reviewing.

Best regards.

[NinjaTrader_ChrisL]

Hello habibalex,

I found that we need to use TriggerCustomEvent when accessing the series while in a non data-driven method. I attached my example here.

Please let me know if I can assist any further.