.b dual dynamic SR

This is dual band dynamic S/R indicator

• It works on longger swing than BB 20,2 band rage, and I think It works well.
  
• even on the rapid price change, it quite woks well.
  
• If price goes out of 1st S/R band range, 2nd S/R band shows up on the chart.
  
  
• Because of large bandwidth, An area in which an actual candle is drawn may be displayed as small.
  
• So, with some codework, I made the S/R band occupy only the area near the actual candle drawing area.
  
  
• The S/R band value is calculated as a combination of donchian band, high/low, atr, etc.
  
• and regular default setting value is fixed on the code level. you can change the color set.
  
• For more information, please refer to the source code.
  
  

if you have any questions freely contact to me by message on tradingview, or telegram @sr_bt
but please understand that responses may be quite late.
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Special thanks to all of contributors of community.
The script (originaly .b) may be freely distributed under the MIT license.

without a clear understanding of the house rules,
Several indicators on the charts, it should be clean chart on publishing.
So I am re-publishing as a new one, sorry about that.

Release Notes:

• minor update