text: Title: ADX value from plugin vastly different from Tradingview, just me or did I mess up some entry?
  Body: Hi,
  
  So first off this problem persists across multiple plugins and code. I love the pandas_ta library thus was hoping we could find a solution here. 
  
  First off here is the difference in values:
  ![image](https://user-images.githubusercontent.com/104263942/164912299-e70b4003-2660-4b84-8b9d-e5cab2398f5e.png)
  ![image](https://user-images.githubusercontent.com/104263942/164912536-3a72976a-c630-4f1a-8006-93e6a85a52c3.png)
  
  
  
  Here is my code:
  ```python
  def each_copy(ticker):
      ticker_data = pd.DataFrame.copy(df[df["ticker"]==ticker],deep=False)
      ticker_data.set_index('date',inplace=True)
      return ticker_data
  
  test_data = each_copy("MRPL")
  test_data["adx"] = ta.adx(high=test_data.high,low=test_data.low,close=test_data.close)["ADX_14"]
  test_data["aDMP_14"] = ta.adx(high=test_data.high,low=test_data.low,close=test_data.close)["DMP_14"]
  test_data["aDMN_14"] = ta.adx(high=test_data.high,low=test_data.low,close=test_data.close)["DMN_14"]
  test_data.loc["2022-04-19 15:15:00+05:30":]
  ```
  
  Data from the function 'each copy' is returned this way
  ![image](https://user-images.githubusercontent.com/104263942/164912428-715cc6e1-05f7-42c9-8938-d9eeefbc6105.png)
  
  After adding adx data
  ![image](https://user-images.githubusercontent.com/104263942/164912606-25513427-f728-41d6-a315-3e9983f6aed0.png)
  
  
  I hope this is enough, I did notice that the code on Tradingview is different from what we are using here. Could that be the reason? Does TV use some other formula for ADX?
  
  I am not much of a coder thus relying on your help.
  
  Please help and thank you.