text: Title: Half trend indicator requested with code link.
  Body: Hi. 
  
  I have put request earlier also. This is a custom indicator same as supertrend but much fast and better than it. 
  
  The original code in pine script is at https://www.tradingview.com/script/U1SJ8ubc-HalfTrend/
  
  I am sending link of the already made indicator. 
  
  https://github.com/ryu878/halftrend_python
  
  This indicator is working fine with sample data. Now can it be modified to added in Pandas-ta ??
  
  
  