instrument dataseries automatic update

[ballboy11]

What I want to do is to automatically update my dataseries.

AddDataSeries(sInstrumentName);

// IE: lets say my instrument name is CL 11-18 what I want to do is to see what the Active future is and replace the CL 11-18 to CL 12-18 automatically. Same with NQ 12-18 to NQ 03-18

[NinjaTrader_ChrisL]

Hello ballboy11,

Thanks for the post.

Currently, it is recommended to use only hardcoded values for instrument names in AddDataSeries().

A note from that page:

"Arguments supplied to AddDataSeries() should be hardcoded and NOT dependent on run-time variables which cannot be reliably obtained during State.Configure (e.g., Instrument, Bars, or user input). Attempting to add a data series dynamically is NOT guaranteed and therefore should be avoided. Trying to load bars dynamically may result in an error similar to: Unable to load bars series. Your NinjaScript may be trying to use an additional data series dynamically in an unsupported manner."

A simple workaround would be to refactor the code by using the search+replace all feature in the NInjaScript editor.

Please let me know if I can assist further.

[zacharydw00]

The implications of that is a vendor has to manually update the instrument's contract month in the AddDataSeries() line of code, compile a new indicator/strategy version, and then send it out to all the customers.
So a new indicator version must be created every time a contract rolls over to the next contract???

I hope you guys understand thats a lot of unnecessary work on the vendors and more importantly the customers.

[NinjaTrader_ChrisL]

Hello,

Thanks for the follow-up.

I was able to use a string input property and add a secondary series with that. Doing this is just unsupported so it would need to be done at one's own risk. Also, if you are looking to add a series where the instrument is the same as the primary series with a different time period, you can just pass "null" for the instrument name, and that will add a series of the primary series.

For the instrument name parameter null could be passed in, resulting in the primary data series instrument being used.

Please let me know if I can assist further.

[ballboy11]

• zacharydw00 I agree with you with the updates. I do have a rolloverindicator that tells the date of the rollover. I know I can write the string in my parameters but what i wanted to find the current future. I am trying to make it user friendly in order the user doesn't have to type in a typo error

[ballboy11]

There must be a typecast for the insturments one can add as a dropdown