class_docstr: https://school.stockcharts.com/doku.php?id=technical_indicators:average_directional_index_adx
class_docstr_tok: ["https",":","\/\/school.stockcharts.com\/doku.php","?","id=technical_indicators",":","average_directional_index_adx"]
code: def test_adx_neg2(self):
      target = "-DI14"
      result = self._indicator.adx_neg()
      pd.testing.assert_series_equal(
          self._df[target].tail(), result.tail(), check_names=False
      )
  
imports: import unittest
  import pandas
  from ta.trend import MACD, ADXIndicator, CCIIndicator, PSARIndicator, STCIndicator, VortexIndicator, WMAIndicator, adx, adx_neg, adx_pos, cci, macd, macd_diff, macd_signal, psar_down, psar_down_indicator, psar_up, psar_up_indicator, stc, vortex_indicator_neg, vortex_indicator_pos, wma_indicator
label_desc: Use image node_id 8 for calling the TestADXIndicator obj's underlying member method code with example usage: obj.test_adx_neg2() without return types