I'm finally trying some programming ! In searching through all the posts and the guides, I have not seen a way to draw a horizontal line, indicating support/resistance at a previous low/high. Preferably using some lookback period (XX), such as "the high for the last XX weeks/days".

Could someone suggest some code that could accomplish this simple task ?

Thanks in advance............

Highest

Eugene, Thanks for the timely response and link to the Wiki !

I had forgotten about the Wiki ? Looking back at the home page you find it at support/knowledge base. There is no obvious upfront link ? 'More reading to be done'

I loaded that code and played with it for awhile. It works great, but it annotates the bar 'NH' at many bars, with the last at [bar - 100]. So I just need to figure out how to assign a value to the high of the last 100 bar period. Then I can draw the 'one' Horizontal line.

Thanks Again

What's wrong with the Highest Indicator? It seems to precisely meet the requirements you've described except for "one" horizontal line. Why only "one"?

.. which is easy too.

CODE:
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Thanks again for the help with this.

I had the code in a loop and it drew multiple horizontal lines at each high.
The code I have now (still in the loop) is working fine and draws 'one' horizontal line for the high in a lookback period does the same for the low of that lookback period.

CODE:
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It is not working. could you post the entire code here like in the link of Eugene's message above. thanks.

The Wiki code sample for Highest undoubtedly works 100%.