Opening Range Breakout Asia session

RBO Asia Box

The Asian range, defined automatically every session

RBO Asia Box identifies, calculates and displays the Asian session range directly on your ProRealTime chart, providing a consistent reference for analysing subsequent price behaviour.

The range is built using a fixed UTC reference, automatically converted to the corresponding Frankfurt/Berlin local time.

You do not need to manually calculate the Asian high and low or change the session times when European daylight saving time changes.

One session reference. Automatically adjusted to local time.

The problem

The Asian session range can provide an important reference for analysing the price behaviour that follows.

Drawing the range manually, however, introduces unnecessary work and can lead to inconsistent session definitions, especially when European clocks change between CET and CEST.

RBO Asia Box standardises this process.

Each session, the same range-building criteria are applied and the resulting reference is displayed directly on the chart.

The Box is also designed to provide the same session reference used by compatible components of the RBO Asia Edition ecosystem.

What you see on the chart

During formation, the Box dynamically follows the developing Asian range and displays its FORMING state.

Once the range is complete, the chart can display:

• HIGH — upper boundary of the calculated range
• LOW — lower boundary of the calculated range
• Range size — expressed according to the instrument
• Horizontal HIGH and LOW references extending through the applicable analysis window
• Previous session boxes for historical visual comparison
• Historical range sizes
• Session/time reference

The result is a compact visual representation of the Asian session range without manually drawing it each day.

How it works

RBO Asia Box uses the following canonical UTC reference:

The underlying reference remains UTC.

Only its local Frankfurt/Berlin representation changes between winter and summer time.

No manual seasonal adjustment is required.

From formation to completed range

While the session is forming, the Box updates as new highs or lows are established.

After the formation window ends, the range becomes the completed session reference.

The HIGH and LOW levels remain visually available during the applicable analysis window.

Previous session boxes remain visible, allowing the current range to be compared with recent sessions without manually measuring them.

How to interpret the range

RBO Asia Box provides context, not a trading instruction.

A larger or smaller range is not a buy or sell signal by itself.

For example, if recent Asian ranges were:

34 pips · 22 pips · 41 pips

and the current range is:

29 pips

the chart immediately provides a visual comparison with recent sessions.

The trader can then incorporate that information into their own methodology.

Example of use

Illustrative example — EURUSD, 15-minute chart, European summer time.

After completion of the Asian range, the chart could show:

RBO ASIA: 29 pips

HIGH: 1.08742

LOW: 1.08455

The HIGH and LOW references remain projected through the applicable analysis window.

Previous session boxes provide additional visual context.

No manual calculation is required to identify the current range or compare it with recent sessions.

What RBO Asia Box does

SESSION RANGE

Automatically calculates and displays the Asian session range.

LIVE FORMATION

Shows the range while it is being formed.

HIGH / LOW

Displays the completed range boundaries.

RANGE SIZE

Shows the calculated size of the session range.

HISTORICAL BOXES

Keeps previous session ranges visible for comparison.

AUTOMATIC TIME CONVERSION

Uses the UTC reference and automatically reflects the corresponding CET/CEST local time.

What it does not do

RBO Asia Box:

• does not function as a multi-instrument scanner;
• does not calculate Setup Score;
• does not assign a setup-quality classification;
• does not provide buy or sell instructions;
• does not replace the trader’s analysis or decision-making;
• does not provide the historical trade-development functionality of RBO Asia Tradelog.

The Box provides the session structure.

Who is it for?

RBO Asia Box is designed for ProRealTime traders who:

• analyse intraday markets;
• work with Asian-session ranges;
• use breakout, continuation, rejection or reversal approaches around session levels;
• want to eliminate manual range marking;
• want a consistent session reference;
• want previous session ranges available directly on the chart.

Instruments and timeframes

The development reference universe includes:

• DAX
• EURUSD
• GBPJPY
• US500
• Nasdaq
• Silver

The logic is designed for application to other instruments compatible with ProRealTime, subject to data availability, chart configuration and the suitability of the methodology for the instrument.

Supported chart timeframes

• 1 minute
• 5 minutes
• 10 minutes
• 15 minutes
• 30 minutes

Important technical note

The session is UTC-anchored, not based on a fixed European clock time.

This distinction is important because Frankfurt/Berlin observes European Daylight Saving Time while Tokyo does not.

The local representation therefore changes automatically:

Winter → CET → 01:00–07:59

Summer → CEST → 02:00–08:59

The underlying Asian session reference remains unchanged.

Relationship with RBO Asia Starter

RBO Asia Box is the session-structure component of RBO Asia Starter.

The Starter package combines:

RBO Asia Box

Session range + historical range reference

RBO Asia Tradelog

Trade tracking + historical trade record

Together they create the foundation of the RBO Asia Edition workflow.

Availability

RBO Asia Box is delivered as part of the RBO Asia Starter package together with RBO Asia Tradelog.

RBO Asia Starter

Box + Tradelog

79 €

Methodological Notice

RBO Asia Box is software for rule-based visual market analysis.

The displayed range, HIGH, LOW, range size and applicable analysis window are calculated from the defined parameters and market data.

They do not constitute financial advice, personalised investment recommendations, buy or sell instructions, or guarantees of performance.

In simple terms, the Opening Range Breakout strategy is a daily trading strategy that seeks to take advantage of the trading range ahead of the London/Frankfurt opening session. You get trading signals daily from 8:00 am with exact entry prices for buy and sell (long / short) with stop loss and price target.

Time frame: H1, 3Om, 15m, 10m, 5m and 1m.

The first movement in the morning is often the decisive one.

Once in ProRealTime, it is important to set the time zone. Make sure that the UTC+02:00) option is checked. The image shows an installation in Germany. Our systems are configured by default in CET time (Central European Time), that is the same for Spain, France or Sweden for example.