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How to use custom indicators？

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Alex Yu last edited by
How to introduce indicator a?
```
    def __init__(self):
```
What to write next to avoid errors？'Lines_LineSeries_DataSeries_OHLC_OHLCDateTime_Abst' object has no attribute 'a'
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A
ab_trader last edited by

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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