Error fetching SMA numbers

[Tonkingrf1551]

Good morning

I have an indicator with 60min primary data series and Daily as secondary data series. I have CurrentBars[1] <= BarsRequiredToPlot and BarsRequiredToPlot = 201

I have added SMA100 = SMA(BarsArray[1], 100); for the daily 100 sma

When I Print("100sma " + SMA100[80]); I get an Error on calling 'OnBarUpdate' method on bar 4904: You are accessing an index with a value that is invalid since it is out-of-range. I.E. accessing a series [barsAgo] with a value of 5 when there are only 4 bars on the chart.

If I am requiring 201 daily bars, and asking for the 100 period SMA price 80 daily bars ago shouldn't I have enough bars? This error seems to go away if I ask it to Print("100sma " + SMA100[60]);

Any help will be appreciated.

Thanks,
Ryan

[NinjaTrader_ChrisL]

Hi Ryan, thanks for posting. You will need more bars in the secondary series to process this. Try first printing out BarsArray[1].Count. A 100 day SMA needs 100 bars to create one data point, so you need more than 200 bars in the secondary series to complete this calculation.

[Tonkingrf1551]

Chris,

Thanks for the response. With that print function it tells me how many bars I have but I am not sure why I would need more then 200 bars or how to find out if I need more. If the 100 SMA uses 100 previous bars for todays data point, and 100 days ago it uses the previous 100 bars for that data point, why would I need more then 200 bars to plot?

Thanks,
Ryan

[NinjaTrader_ChrisL]

Hi Ryan, there are not enough secondary bars loaded to support the 100 SMA for that series. You can load a specific amount of bars using this overload to resolve this:

AddDataSeries(string instrumentName, BarsPeriod barsPeriod, int barsToLoad, string tradingHoursName, bool? isResetOnNewTradingDay)