reading data from another chart

[ballboy11]

I was creating a new indicator and noticed one can receive data from another chart but the question is how do you isolate one data series from another here is the code

else if (State == State.Configure)
{
AddDataSeries("CL 10-17", Data.BarsPeriodType.Minute, 1, Data.MarketDataType.Last);
}
}

protected override void OnBarUpdate()
{
Print(Time[0]);
Print("high cl " + High[0]);
Print("++++++++++++++++++++");
}

the data displayed is this in the output box it is a NQ chart but CL data series added.

2017-09-01 8:16:00 AM
high cl 46.74
++++++++++++++++++++
2017-09-01 8:16:00 AM
high cl 5987.25
++++++++++++++++++++
2017-09-01 8:17:00 AM
high cl 5984.75
++++++++++++++++++++
2017-09-01 8:17:00 AM
high cl 46.71
++++++++++++++++++++

the question is

How can you differentiate the difference between the NQ data and the CL data

[NinjaTrader_PaulH]

Hello ballboy11,

Thanks for your post.

Each data series added to the script will call the OnBarUpdate(). As your script shows, when CL calls the OnBarUpdate() the references of High[0] point to the CL data, when NQ calls OnBarUpdate() then High[0] points to the NQ data.

You can use BarsInProgress to isolate or segment your code. The chart bars are always BarsInProgress 0, the first added dataseries is 1, the next 2, etc etc.

Here is an example of segmenting:

if (BarsInProgress == 0)
{
Print(Time[0]);
Print("Chart Bars: " + High[0]);
Print("++++++++++++++++++++");
}

if (BarsInProgress == 1)
{
Print(Time[0]);
Print("Added bars: " + High[0]);
Print("++++++++++++++++++++");
}

if you only wanted to work with the chart bars you could use:
protected override void OnBarUpdate()
{
if (BarsInProgress != 0) return; //
..
.
}

As you are into a multi instrument script, it will be important for you to review the helpguide as there are many considerations besides BarsInProgress and they are sequentially detailed here: http://ninjatrader.com/support/helpG...nstruments.htm

[ballboy11]

Thank you Instrument population

Thanks That is exactly what I was looking for. Last question is there a way to populate
Instruments in a parameter list the same ones that are on the top of the chart.

Active instruments that the user commonly uses

[NinjaTrader_PaulH]

Hello ballboy11,

Thanks for your reply.

I'm not quite sure I understand what you are trying to do or looking for. Can you clarify where you want to use a drop down type instrument list?

[ballboy11]

On the top left hand corner there is the instrument list

Cl 10-17
NQ 09-17
ES 09-17
GC 11-17


etc

Can you poplulate the current user list in the indicator parameter as a drop down list

[NinjaTrader_PaulH]

Hello ballboy11,

Thanks for your reply.

I have not been able to find a way to provide access to a recents instrument list from an indicator property and will continue looking and will update this thread if/when I have further information on this.

[ballboy11]

Thank you. (NOTES FOR DRAWING APPLICATIONS)

A personal note on BarsInProgress.

I think the OnbarUpdate goes through BarsInProgress 0 THEN BarsInProgress1

I made a function with If statements with BarsInProgress 0 and 1 and I found out if I want to make my program work I had to make a global variable to store the if( BarsInProgress== 0 For high low close etc.

I needed bars in progress 1 information but with bars in progress 0 data

[NinjaTrader_PaulH]

Hello ballboy11,

Thanks for your reply.

The order of the BarsInProgress could be different on different chart bars, for example, if the chart bars were of a slower time frame than the added data series.

You can access different data series from different BarsInProgress. Here is an example that would check the added data series High value is greater than the SMA(10) of the added dataseries during the chart bars update.

if (BarsInprogress == 0)
{

if (Highs[1][0] > SMA(Closes[1], 10)[0]) // check the added dataseries values
{
// do something
}
}

Please review in sequence: http://ninjatrader.com/support/helpG...nstruments.htm