Day Open ± Ø DailyRange

Script Function Description
This indicator draws two horizontal dashed lines during the Regular Trading Hours (RTH) session.

The upper line is calculated as the RTH Open price plus the average daily range (based on the last 10 days).

The lower line is calculated as the RTH Open price minus the average daily range.

🔍 How it works
Average Daily Range (ADR): The script requests daily candles and computes the 10‑day simple moving average of the daily range (High–Low). This value remains constant throughout the trading day.

RTH Detection: The script identifies the first bar of the RTH session (e.g., 09:00 local exchange time). The open price of this bar is stored as the RTH Open.

Line Creation: At the first RTH bar, two dashed lines are drawn:

Green line above the RTH Open (Open + ADR).

Red line below the RTH Open (Open – ADR).

Dynamic Extension: As new bars appear, the lines are automatically extended to the current bar, keeping their Y‑values constant. This ensures the levels remain visible throughout the session.

✅ What Users See
A green dashed line above the RTH Open, marking the typical upside boundary.

A red dashed line below the RTH Open, marking the typical downside boundary.

Both lines start at the first RTH bar and extend to the latest bar of the session.

This helps traders quickly assess whether price action is staying within or breaking beyond the typical daily range relative to the RTH Open.