External Symbol - Plotting and Using

Author: innertrader

Creation Date: 2/9/2017 5:03 AM

Wealth Lab » WealthScript (.NET) » External Symbol - Plotting and Using

innertrader

2/9/2017 5:03 AM

I would like to add an External Symbol value as an additional condition in a trading strategy. First, I am trying to plot the series, but it gives me the Primary Symbol plot in the new pane instead of the External Symbol. Here is the code:

CODE:
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Once this is working I want to use the daily External Symbol value as part of trading rule. Would I do this like this?

CODE:
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Do I need to use ChangeContext( ) anywhere if I only want to trade the Primary Symbol, not the External Symbol?

Eugene

2/9/2017 5:55 AM

1 -

CODE:
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2 - No, you don't have to use Set/RestoreContext.

innertrader

2/9/2017 7:53 AM

I had that previously, but it generates the following error:

QUOTE:
Run time error. Object reference not set to an instance of an object.

Eugene

2/9/2017 8:27 AM

Look, you can not have it other than "vix.Close" if you want to plot the secondary symbol's series. Having a runtime error is not a good reason to break the correct syntax.

Ideas to try:

1) Use Synchronize()
2) Call GetExternalSymbol() without dataSetName
3) More troubleshooting suggestions in the Wiki > Errors | Strategy > Object reference not set to an instance of an object