OPEN-SOURCE SCRIPT
Updated Custom Session Hi-Low [crlmx]
Overview
Custom Timeframe High/Lows extensions for any intraday window.
Use this to mark sessions Initial Balance (opening 60min),
the first 30 or 15min (for Open-Range-Breakout strategy).
Key Features
- Custom session time input (e.g., 0900-1000, 1430-1445)
- High/Low extension lines from session end to midnight
- Toggle individual weekdays
- Streamlined inputs/UI brought to you by crlmx
Trading Applications
- Use session open high/low as key levels for the day
- Use session high/low as support/resistance day/week
- Track specific windows: New York, London, Asia open/close 60min
- Breakout above/below can signal directional bias
- Range holds indicate consolidation
NY Open (UTC): 1430-1530 | Days: Mon-Fri | Chart: 1-15min
London Open (UTC): 0800-0900 | Days: Mon-Fri | Chart: 1-15min
Asia Session (UTC): 0000-0600 | Days: Mon-Fri | Chart: 15min-1H
Version History
v1.19 (Latest - 09 Feb 2026)
- Custom session time window
- Weekday selection (Mon-Fri default)
- High/Low extension lines to cap at midnight
Custom Timeframe High/Lows extensions for any intraday window.
Use this to mark sessions Initial Balance (opening 60min),
the first 30 or 15min (for Open-Range-Breakout strategy).
Key Features
- Custom session time input (e.g., 0900-1000, 1430-1445)
- High/Low extension lines from session end to midnight
- Toggle individual weekdays
- Streamlined inputs/UI brought to you by crlmx
Trading Applications
- Use session open high/low as key levels for the day
- Use session high/low as support/resistance day/week
- Track specific windows: New York, London, Asia open/close 60min
- Breakout above/below can signal directional bias
- Range holds indicate consolidation
NY Open (UTC): 1430-1530 | Days: Mon-Fri | Chart: 1-15min
London Open (UTC): 0800-0900 | Days: Mon-Fri | Chart: 1-15min
Asia Session (UTC): 0000-0600 | Days: Mon-Fri | Chart: 15min-1H
Version History
v1.19 (Latest - 09 Feb 2026)
- Custom session time window
- Weekday selection (Mon-Fri default)
- High/Low extension lines to cap at midnight
Release Notes
Update Version v1.24 Update• Timezone fix
Release Notes
Version v1.25 • Time management fix
• Updated Chart - showing 1H of NY-Session
Release Notes
Version 1.27 • Time management fix
• Timebox Line extension cuts out at calendar day
- works by default for 24H assets
- Session based asset may require a UTC offset.
• Default settings show NYC opening range, first 30min
Release Notes
Version 1.29• Display bug fix
Open-source script
In true TradingView spirit, the creator of this script has made it open-source, so that traders can review and verify its functionality. Kudos to the author! While you can use it for free, remember that republishing the code is subject to our House Rules.
Disclaimer
The information and publications are not meant to be, and do not constitute, financial, investment, trading, or other types of advice or recommendations supplied or endorsed by TradingView. Read more in the Terms of Use.
Open-source script
In true TradingView spirit, the creator of this script has made it open-source, so that traders can review and verify its functionality. Kudos to the author! While you can use it for free, remember that republishing the code is subject to our House Rules.
Disclaimer
The information and publications are not meant to be, and do not constitute, financial, investment, trading, or other types of advice or recommendations supplied or endorsed by TradingView. Read more in the Terms of Use.