UK Dual-Session Highlighter (Fixed Day, Dynamic Break)

Overview
Specifically engineered for UK-based Nasdaq (NQ) and US Index traders who operate on a fixed professional schedule (09:15 – 17:15 UK Time).
The primary challenge for UK traders is the 4-week annual "Timezone Mismatch" between London and New York (occurring in March and October). During these weeks, the US market opens at 13:30 UK time instead of the usual 14:30. This indicator solves that problem by automatically shifting your 90-minute lunch break to ensure you are always back at your desk exactly 1 hour before the Wall Street opening bell.
The "Smart Break" Logic
The indicator maintains a strict 09:15 start and 17:15 finish, but dynamically re-calculates the internal "Lunch Lull" based on the live US/UK offset:
Standard Weeks (5hr Offset):
Morning: 09:15 – 12:00 | Break: 12:00 – 13:30 | Afternoon: 13:30 – 17:15
Mismatch Weeks (4hr Offset):
Morning: 09:15 – 11:00 | Break: 11:00 – 12:30 | Afternoon: 12:30 – 17:15
Key Features (2020–2030 Ready)
Universal Backtesting: Unlike basic session highlighters, this script uses a mathematical calendar to identify DST mismatch dates for any year between 2020 and 2030. Perfect for verifying historical strategy performance.
Zero-Maintenance: Automatically detects when the US "Springs Forward" or the UK "Falls Back" earlier than the other.
Volatility Sync: Ensures your afternoon trading session always begins during the high-volume US Pre-Market window (1 hour before the NYSE open).
Visual Clarity: Uses distinct colors to separate the London Morning trend from the New York Open overlap.
How to Use
Blue Zone (Morning): Trade the London session momentum.
Uncolored Zone (Break): The "Lunch Lull." Step away from the screens during lower liquidity.
Green Zone (Afternoon): Focus on US Economic Data (8:30 AM ET) and the 14:30 (or 13:30) New York Open.
Settings
All times are hard-coded to Europe/London standards. No manual timezone adjustments are required on your chart settings.