class_docstr: Util mixin indicator class
code: def _true_range(
      high: pd.Series, low: pd.Series, prev_close: pd.Series
  ) -> pd.Series:
      tr1 = high - low
      tr2 = (high - prev_close).abs()
      tr3 = (low - prev_close).abs()
      true_range = pd.DataFrame(
          data={"tr1": tr1, "tr2": tr2, "tr3": tr3}
      ).max(axis=1)
      return true_range
  
file_path: ta/ta/utils.py
imports: import math
  import numpy
  import pandas
label_desc: Use image node_id 2 for calling the IndicatorMixin obj's underlying member method code with example usage: obj._true_range(high, low, prev_close) and returns: true_range