For code/output blocks: Use ``` (aka backtick or grave accent) in a single line before and after the block. See:

How to use custom indicators?

  • How to introduce indicator a?Jietu20201005-173405.jpg

        def __init__(self):

    What to write next to avoid errors?'Lines_LineSeries_DataSeries_OHLC_OHLCDateTime_Abst' object has no attribute 'a'

  • Please read the docs by tge links provided to you in your other post. It should be enough to resolve your isdur.

    And please don't spam, it doesn't bring any value to community.

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