Bar-Close Confirmed Supertrend

Overview
This indicator is a Supertrend-style trend follower that confirms direction changes only after a bar closes. Trend flips are determined using the previous bar’s close relative to the bands, which helps avoid intrabar changes during live candles.

How it works

• Computes ATR (Average True Range)
  
• Builds upper/lower bands using ATR and a multiplier
  
• Updates trend direction only when a prior candle confirms a break of the band
  

Confirmation logic (bar-close based)
Trend direction is updated using conditions based on the previous candle, such as:

• close[1] > upper[1] → confirm uptrend
  
• close[1] < lower[1] → confirm downtrend
  

Because signals are confirmed on the prior bar, trend changes and markers are displayed only when confirmation exists.

Signals

• Uptrend confirmation: prior candle closes above the upper band → bullish marker
  
• Downtrend confirmation: prior candle closes below the lower band → bearish marker
  

Inputs

• ATR Length (default 10)
  
• ATR Multiplier (default 3.0)
  

Notes
This script is intended for bar-close workflows. Behavior and responsiveness may differ across markets and timeframes depending on volatility and chosen settings.