Spread between S&P cash and futures

[edmata1109]

Hello, I am trying to have a plot calculate the spread value between the S&P 500 cash and futures markets. Though I am having problems getting it to plot as all I get on the indicator panel on my chart is a prompt saying "Calculating..."

I believe the problem may be because the trading hour templates are different between the instruments. Is that correct? I've included the code below.

AddPlot(Brushes.Orange, "T");
}
else if (State == State.Configure)
{

AddDataSeries("ES 12-19", Data.BarsPeriodType.Minute, 1, Data.MarketDataType.Last);
AddDataSeries("^SP500", Data.BarsPeriodType.Minute, 1, Data.MarketDataType.Last);
}
}

protected override void OnBarUpdate()
{
Values[0][0] = Closes[2][0] - Closes[1][0];
}

[NinjaTrader_Jesse]

Hello edmata1109,

Thank you for the post.

You may be having an error, can you check the control center log tab?

For this type of plotting you generally need to do two things which would be:

protected override void OnBarUpdate()
{
[B]if(CurrentBars[0] < 1 || CurrentBars[1] < 1 || CurrentBars[2] < 1) return;
if(BarsInProgress != 0) return; [/B]
Values[0][0] = Closes[2][0] - Closes[1][0];
}

This would ensure you have data for all series and that you are only plotting for the primary series.

Can you check if this assists in getting the indicator plotting?

As an alternative, try adding different time frames of the same instrument and add a Print instead of plotting. This would just help to confirm if one instrument is failing to load.


I look forward to being of further assistance.

[edmata1109]

Jesse,

Adding the CurrentBars and BarsInProgress objects allowed it to plot. Thank you for your help.

Edgar