How to detect user doesn't have access to data

[bubblegum]

Hi,

I use AddDataSeries() to add several other symbols in my code. But if the user doesn't have access to that data (they haven't subscribed) then the whole indicator is just blank. How can I detect that they don't have access to that data, or continue to display the rest of the indicator even without that particular symbol?

Thanks

[NinjaTrader_ChelseaB]

Hello bubblegum,

The same way a chart does.

If the chart doesn't load data then the user doesn't have access to that data.

Similarly if you do a BarsRequest and the request come up with nothing, the user doesn't have access to the data..

[bubblegum]

If I have 'AddDataSeries()' in my code, and the user doesn't have access to that data, will the indicator always be blank?

[NinjaTrader_ChelseaB]

Hello bubblegum,

If there is data for the primary series, that series may still update OnBarUpdate(). It would depend on how the script is written and if the conditions are written to trigger actions in BarsInProgress 1 or above.

[bubblegum]

So what do I need to do to this code to get is to plot something, even when I don't have access to the symbol in AddDataSeries (in this case "CL ##-##") ?

        {
            if (State == State.SetDefaults)
            {
                AddPlot(new Stroke(Brushes.LimeGreen, 3), PlotStyle.Line, "Plot A");
                AddPlot(new Stroke(Brushes.Red, 3), PlotStyle.Line, "Plot B");
            }
            else if (State == State.Configure)
            {
                AddDataSeries("CL ##-##", BarsPeriodType.Minute, 3);
            }
        }

        protected override void OnBarUpdate()
        {
            if ( CurrentBars[0] < 1 || CurrentBars[1] < 1 ) return;

            Values[0][0] = Closes[0][0];
            Values[1][0] = Closes[1][0];
        }

[NinjaTrader_ChelseaB]

Hello bubblegum,

The CurrentBars[1] < 1 requires the first added series to have at least 1 bar.

That would be necessary to reference Closes[1][0].

If you were to make the condition separate that calls this, you could still allow Values[0] to be set to Closes[0][0] in a separate condition set that only looks for CurrentBars[0] to have at least one bar.

[bubblegum]

That's it. So obvious when you point it out. Thank you.