EURUSD Pre-London Open Range Marker

EURUSD Pre-London Open Range Marker

This script marks the high and low formed in the pre-London open period on EURUSD, and extends those levels forward once London opens.
It is intended as a neutral reference tool for traders who pay attention to time-based structure around the London session.

What it does
Automatically tracks London time, including daylight-saving changes
Identifies the pre-London open range
Plots the high and low of that range
Extends those levels forward from the London open
Displays the range size (pips)

What it does not do
No trade signals
No alerts
No entries, stops, or targets
No performance claims
This script provides structure only. Interpretation and execution are left to the user.

Intended use
This tool is for traders who:
Trade EURUSD
Care about London session behaviour
Prefer simple, time-based reference levels over indicators

Scope and design
Hard-coded for EURUSD
Pre-London open window is fixed and not user-configurable
Built to prioritise consistency and repeatability over flexibility
Additional context
I use this pre-London range as part of a fully documented, rules-based EURUSD trading system focused on risk management and repeatable execution which I have traded for two years.
The strategy itself is not included here.

Disclaimer
This script is provided for educational and reference purposes only.
All trading involves risk. You are responsible for your own decisions.
One-line link
For those interested in how this range is used within a complete, rules-based EURUSD trading system, further documentation is available here: