9:30 AM 1-Minute Open Highlight

Script Description

This script highlights the first 1-minute candle of the New York session (09:30 ET) on every trading day.
It automatically detects the opening bar and marks its full range (high–low) with a box that remains visible across all timeframes.
The script keeps only the most recent 30 trading days on the chart, so older markers are automatically removed.

This makes it easy to track the NY open consistently and use it as a reference point for daily analysis and trading setups.