How to initiate a series in a drawing tool?

[raffu]

Hi,
I'm trying to add a series to a custom drawing tool

like on state change
:
..
else if (State == State.Active)
{
// Series1 = new Series<double>(GetAttachedToChartBars().Bars, MaximumBarsLookBack.Infinite); // nope, didn't work
// Series1 = new Series<double>(this, MaximumBarsLookBack.Infinite); // nope , didn't work
Series1 = new Series<double>(xxx, MaximumBarsLookBack.Infinite); // what to use or totally different approach needed?

}​
..

so what to add to that xxx to get it attached to the bars data ?

Somehow stuck now...

[NinjaTrader_BrandonH]

Hello raffu,

Thanks for your post.

To clarify, are you trying to create a custom Series<double> variable and use that custom Series for your Draw method?

You could create a Series<double> variable, assign a value to that variable in OnBarUpdate(), and then call your Draw method, such as Draw.TextFixed(), to draw the value of that custom Series variable on the chart.

See the attached example script demonstrating this.

Also, see the help guide documentation below for more information.

Series<T>: https://ninjatrader.com/support/help...t8/seriest.htm
Drawing: https://ninjatrader.com/support/help...t8/drawing.htm
Draw.TextFixed: https://ninjatrader.com/support/help..._textfixed.htm

Let me know if I may assist further.

[raffu]

Thanks but not for Indicator or Strategy to the new Drawing Tool !

same what is achieved with:

else if (State == State.DataLoaded) // this is not called from Drawing Tool ! ( but that is not a proble, State.Active could be used)
{
// Instantiate the custom Series<double>
MyCustomSeries = new Series<double>(this); // if indicator or startegy used, this is simple // so this line????
}
​
but how to Drawing Tool

[NinjaTrader_BrandonH]

Hello raffu,

Thanks for the clarification.

Custom Series cannot be used in a custom DrawingTool. This is because draw objects do not manage historical data. DrawingTools use the attached object to find values based on anchors.

ISeries<T> is an interface that is implemented by all NinjaScript classes that manage historical data as an ISeries<double> (Open, High, Low, Close, etc)

See this help guide page about Series<T>: https://ninjatrader.com/support/help...l?iseriest.htm

See this help guide page for more information about creating a custom DrawingTool: https://ninjatrader.com/support/help...wing_tools.htm

Let me know if you have further questions.

[raffu]

Thanks for confirming it, actually that was something what I thought...
(it would have been too easy otherwise)

[vickygupta4223]

In order to create a series by explicitly proving index instead of the default, we have to provide a list of elements to the index parameter with the same number of elements as it is an array.


# import pandas as pd
import pandas as pd

# import numpy as np
import numpy as np

# simple array
data = np.array(['g', 'e', 'e', 'k', 's'])

# providing an index
ser = pd.Series(data, index=[10, 11, 12, 13, 14])
print(ser)