This is an extended version of Heiken Ashi indicator with the ability to average (smooth) the values for the specified period of bars and select the applied price: considering "Open price" or not. The description is provided in the parameters. Three screenshots are displayed below: standard version (1 bar), 3 bars and 5 bars.

МetaТrader 5 version with the ability to test: https://www.mql5.com/en/market/product/7327

Parameters

• Period to average - calculation period
  
• HAClose price mode - Close price calculation mode
  
• Draw histogram(true) or line(false) - indicator display mode (histogram/lines)
• alert on closed bars - alerts on closed bars
  
• alert message - text message
  
• alert mail - send an email
  
• alert notification - send a notification
  
• alert sound - audio signal
  
• alert sound file name - audio file name