Daily Separator & Killzone marker (L3J)

The “Daily Separator (L3J)” is a tool built for day traders who want a clean intraday structure around key U.S. market times and a professional trading-day model. It visually segments trading days, marks critical intraday timestamps (pre-market, cash open, killzone), and aligns with routines inspired by ICT concepts.
Important note: internal code comments and notes are written in French.

What the script does

1. Draws clear, configurable vertical lines to separate each trading day.
   
2. Supports two trading-day models:
   - CME 18:00–17:00 (anchored on the Asian session, common for indices/futures)
   - Calendar 00:00–23:59 (midnight-to-midnight)
   
3. Plots four key intraday rays in UTC‑4:
   - 08:30 — U.S. pre-market open
   - 09:30 — U.S. cash market open
   - 09:50 — killzone start (per my routine)
   - 10:30 — killzone end (per my routine)
   
4. Smart display logic: each day’s marker stays visible until the time is reached, then auto-hides to keep charts clean.
   
5. Object-budget control: caps the number of historical separators to preserve performance.
   

Day trading strengths (ICT-friendly)

1. Robust CME anchoring: day switches at the Asian session start in UTC‑4, which better reflects U.S. liquidity flow than calendar midnight.
   
2. Focused killzone: highlights 09:50–10:30 for impulse setups, rebalancing, and liquidity events around the open.
   
3. Clean readability: fully customizable colors, styles, and widths; markers auto-remove after their window.
   

Inputs (end‑user labels in French)

1. - Timezone: choose the time zone (default UTC‑4) for session alignment.
   
2. - Day separator:
   - Day type: “CME 18:00–17:00” or “Calendrier 00:00–23:59”
   - Color, style (solid, dashed, dotted), width
   - Max number of visible separators (performance control)
   
3. Session (CME): Asian session window used as the anchor (default 18:00–16:00 UTC‑4)
   
4. ndependent intraday markers:
   - Pre‑Market Open 08:30
   - Market Open 09:30
   - Killzone Open 09:50
   - Killzone Close 10:30
   
5. - Each with show/hide, color, style, and width settings
   

Best practices

1. U.S. indices ( ES1! , NQ1! ) and U.S. equities: favor the “CME 18:00–17:00” mode for a more liquidity‑centric read.
   
2. ICT day trading: form directional bias around 09:30, execute between 09:50–10:30 as initial volatility structures.
   
3. Multi‑timeframe use: keep it on execution charts (1–5 min) and context charts (15–60 min) for time alignment.
   

Technical notes

1. Created by L3J.
   
2. Pine Script v6, overlay=true, controlled object budget.
   
3. Deterministic time calculations via Pine built‑ins.
   
4. All times are expressed in UTC‑4 to align with U.S. practice; adjust the timezone input as needed.
   
5. - Internal code comments/notes are written in French.
   

If this script helps you structure your sessions better, consider leaving a like and sharing it with other intraday traders.
Happy trading, everyone!