12 lines
312 B
Markdown
12 lines
312 B
Markdown
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```python
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# 1. 计算指标
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def populate_indicators(self, dataframe: pd.DataFrame, metadata: dict) -> pd.DataFrame:
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# 计算 20 周期指数均线
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dataframe['ema20'] = dataframe['close'].ewm(span=20, adjust=False).mean()
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return dataframe
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```
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参数：这里的参数
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1. self： |