UK NQ: Custom Day, Dynamic Break

The Problem
For UK-based traders focusing on the Nasdaq (NQ) or S&P 500 (ES), the trading day is usually split into two high-probability windows: the London Morning and the New York Open. However, every year in March and October, the US and UK change their clocks on different dates. During these 4 "Mismatch Weeks," the US market opens at 13:30 UK time instead of the usual 14:30.
If your session highlighter is fixed, your lunch break will be out of sync, causing you to miss the critical US pre-market volatility or trade during the "Lunch Lull."
The Solution
This indicator is a "Smart" session manager specifically designed for the UK timezone (Europe/London). It allows you to set your preferred working hours (e.g., 09:15 to 17:15) but dynamically recalculates your internal lunch break based on the live relationship between the London and New York exchange clocks.
Key Features
Dynamic "Smart Break" Logic: The script identifies when the US has "Sprung Forward" or the UK has "Fallen Back" earlier than the other. It automatically shifts your 90-minute lunch break 1 hour earlier (from 12:00 to 11:00) during those weeks.
Fixed Work Window: Your overall trading day (Start/End times) remains fixed to your local UK clock, while only the internal high-volume windows shift to stay aligned with Wall Street.
Universal Backtesting (2020–2030): Unlike basic highlighters, this script contains a built-in mathematical calendar for DST shifts. It is 100% accurate for historical backtesting across the last 5 years and the next 5 years.
Customizable Inputs: Easily adjust your start time (e.g., 09:00 vs 09:15) and finish time to suit your personal trading plan.
How to Read the Chart
Blue Zone (London Morning): Highlights the trend established by European institutional flow.
Uncolored Zone (The Break): Represents the "Lunch Lull." A visual cue to stay flat during lower liquidity.
Green Zone (US Open/Overlap): Highlights the surge in volume starting with US Economic Data (13:30/12:30) and the New York Opening Bell.
Perfect For:
Intraday traders based in the UK who want a "set and forget" solution that ensures they are always at their desk exactly 1 hour before the US market opens, regardless of what the clocks are doing.