OPEN-SOURCE SCRIPT
Updated Big C Key Levels
Big C Key Levels plots the most important price levels for intraday trading — all in one clean, customizable indicator.
Levels included:
CDH / CDL — Current Day High and Low, updates live as the session develops
PMH / PML — Premarket High and Low, locked in at 9:30 AM EST
PDH / PDL — Previous Day High and Low
PWH / PWL — Previous Week High and Low
Features:
Full customization — colors, line style, line width, and show/hide toggles for each level group
Alert system built in — set alerts for any level break directly from the indicator
Clean visual hierarchy — each level group has its own distinct style so your chart never looks cluttered
Works on all intraday timeframes from 30 seconds up to 4H
How to use:
Open Settings → Inputs to customize each level group to match your chart setup. Use the Alert dropdown to set notifications on any level break.
Levels included:
CDH / CDL — Current Day High and Low, updates live as the session develops
PMH / PML — Premarket High and Low, locked in at 9:30 AM EST
PDH / PDL — Previous Day High and Low
PWH / PWL — Previous Week High and Low
Features:
Full customization — colors, line style, line width, and show/hide toggles for each level group
Alert system built in — set alerts for any level break directly from the indicator
Clean visual hierarchy — each level group has its own distinct style so your chart never looks cluttered
Works on all intraday timeframes from 30 seconds up to 4H
How to use:
Open Settings → Inputs to customize each level group to match your chart setup. Use the Alert dropdown to set notifications on any level break.
Release Notes
Big C Key Levels v1.0 UpdateThis update fully upgrades the indicator into a cleaner intraday key-level map with improved visuals, smarter alerts, and better user control.
Added and improved:
Automatic Exchange timezone default with dropdown timezone options
Opening Range High/Low with live forming levels, locked OR levels, and lighter range shading
Cleaner ORH/ORL label placement with adjustable right-side offset and vertical label spacing
Premarket range shading with lighter default transparency
Previous Close, Day Open, Previous Day, Previous Week, and Previous Month levels
Nearest support/resistance highlighting
Flip markers showing when a level has flipped into support or resistance
Smarter flip invalidation so stale support/resistance markers clear when price loses the level
Grouped alert settings for a cleaner setup menu
Phone-friendly alert format: TICKER | EVENT | PRICE
Cleaner default alert setup focused on PMH/PML, ORH/ORL, PC, and PDH/PDL
Alerts now run through Any alert() function call with filtering controlled inside the indicator settings
Use Any alert() function call when creating alerts. Configure which levels and alert types you want directly from the indicator settings.
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.