Help please and thank you in advance

I am obviously doing something wrong because it compiles but then there appears to be no A/D Line

I am trying to calculate the advance decline line for the last 60 days

Even interchanging lines 49 and 50 it does not work.

CODE:
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I am sure there is an easier way to do this but I am c# impaired.

Thanks for your help.

No need to code Advance/Decline Line because it's a built-in IndexDefinition. To create one, open up Index-Lab from the Tools menu. For more information, refer to the synonymous topic in the Wealth-Lab User Guide.

P.S. Wealth-Lab comes with a number of preset market breadth indicators. If you want several dozens more, install the MS123 IndexDefinitions library. Here's a description of what's included: MS123 IndexDefinitions - Component list.

First pointer -

CODE:
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i.e., don't perform the calculation of a DataSeries inside of a loop. The result of the calculation of Sum.Series, a DataSeries, is needlessly assigned over and over to advn_decA. (Internally Wealth-Lab saves you from this because just caches the first result, so it is not recalculated each time; but it's just bad style.)

Second pointer -

QUOTE:
DataSeries advn_decA = new DataSeries(Bars,"advn_decA"); // I finally understood the point of this!!

You do not need to initialize a "new" DataSeries this way unless you plan to calculate the value for each bar yourself.

Third pointer (and this is the real problem) -

CODE:
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Of course, there's no reason to create a 1-bar moving average, so all this code reduces to:

CODE:
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Eugene, the symbols involved are Fidelity Market Sentiment that provides the Advancers and Decliners for all issues on the exchange. We can't recreate that in Index-Lab, especially since the number of symbols traded are always changing.

Robert, you're right. I just thought that as topic starter asks for "Advance Decline Line", he might want neither the code-based solution nor the two groups of market breadth symbols in his script (from both Fidelity and Market Sentiment provider).

Gentlemen:

Thank you. I know the questions may seem perfunctory to you, but I appreciate your help.