UK Asian Range (00:00-06:00) [TZ]

UK Asian Range (00:00–06:00) [TZ] is a session-range overlay indicator built for traders who use the Asian session range as a key liquidity reference for the Frankfurt and London opens. It automatically measures the highest high and lowest low formed during a user-defined “Asia session” window (default 00:00–06:00) and draws that range on the chart as a clean, persistent shaded area.

The goal is simple: make it easy to see where overnight liquidity formed, so you can judge whether price is:

Breaking cleanly out of the Asian range,

Sweeping above/below the range to grab liquidity and reversing,

Respecting the range boundaries as support/resistance as Europe comes online.

What it does

For each trading day, the script:

Detects the start of the selected Asia session window (default 00:00).

Tracks price throughout that window and continuously updates:

Asia High = highest price printed during the session

Asia Low = lowest price printed during the session

At the moment the session ends (default 06:00), it finalizes the range and draws:

A shaded Asia range area that remains on the chart,

An “Asian Range” label placed above the area,

A clean “session area” border style with no right-side edge (so it looks open and unobtrusive rather than like a fully closed box).

Repeats the process daily and keeps a configurable number of past ranges visible for context.

How it works (concept and calculation method)

The script uses session-time detection to determine whether each bar belongs to the Asia session. While the bar is inside the session window, the range is updated using simple, transparent logic:

AsiaHigh = max(AsiaHigh, bar high)

AsiaLow = min(AsiaLow, bar low)

Once the first bar outside the session appears, the session is considered complete and the script “prints” the finalized range objects. Each day’s completed range is stored and preserved so you can compare how later price action interacts with prior Asian ranges over time.

Why the Time zone input matters

Different instruments and brokers can display different “day” boundaries and session timestamps (especially when comparing indices, metals, and FX). This script includes an explicit Time zone input (default Europe/London) so your Asia range window means the same thing across symbols.

In practical terms, it reduces the common frustration where a session box aligns perfectly on one market (e.g., Gold or DAX) but appears shifted on another (e.g., GBPJPY). With the Time zone setting, 00:00–06:00 is always evaluated in the time zone you choose, rather than drifting based on symbol/exchange time settings.

How to use it

Add the indicator to your chart.

Set Time zone to your preferred reference time zone (commonly Europe/London for UK-based traders).

Keep the session at 00:00–06:00 or adjust it to your own Asia definition.

Use the Asia range as a structure tool:

Watch for sweeps above the Asia high or below the Asia low into Frankfurt/London.

Treat the boundaries as potential liquidity targets and support/resistance zones.

Compare current reactions to prior days’ ranges to build pattern recognition.

Inputs included

Time zone: the time zone used to interpret the session times.

Asia Session (HHMM–HHMM): session window (default 00:00–06:00).

Show range area (filled) and styling controls (fill and border width/colour).

Optional Mid line.

Keep last N days: how many historical Asia ranges to keep on screen.

Acknowledgment / Inspiration

This indicator was inspired by the widely used “Asian range box” session concept on Trading View, with a nod to nico948 for popularizing that workflow for many traders. This script is an original implementation built to solve a practical usability issue: adding an explicit time zone selector so the same 00:00–06:00 Asia range aligns consistently across different symbols (indices, metals, and FX) without the need to manually realign session timing.

Notes

This is a visual framework tool. It does not place trades or provide buy/sell signals by itself; it provides a consistent session reference so you can apply your own sweep, reversal, or breakout approach with clear context.