Smart Directional Fib Zone (Selectable Session)

🎯 Overview
This indicator plots a dynamic Fibonacci zone between the 0.5 and 0.618 levels, calculated from the previous day’s price action, and is designed specifically for intraday traders.
It visually highlights key retracement or reaction areas where the market often pauses or reverses.

🔍 How it works
At the start of each day, the script automatically captures:

the previous day’s open (pdo),

high (pdh),

low (pdl),

and close (pdc).

It then determines if the previous day was bullish (Close > Open) or bearish (Close < Open).

Based on that:

If the previous day was bullish, it projects the Fibonacci levels down from the high (typical for expecting retracements).

If bearish, it projects them up from the low.

The two key levels are:

0.5 (50%) retracement / projection

0.618 (61.8%) retracement / projection

A colored zone is plotted between these levels to act as a leading guide for intraday setups.

⏰ Time filtering & session customization
A unique feature is the dynamic session filtering:

By default, the zone is only plotted during active market hours, keeping your chart clean outside trading hours.

The script provides a dropdown selector so you can quickly switch between:

India session (9:15 to 15:30)

Europe session (9:00 to 17:30)

US session (9:30 to 16:00)

Or even define your own custom session times.

This makes it ideal for intraday traders in any region.

🎨 Visual features
The fill zone changes color based on the previous day’s sentiment:

Green zone if the previous day was bullish

Red zone if the previous day was bearish




🚨 Alerts
The script includes an alert condition, so you can easily set up TradingView alerts to notify you when:

Price enters the Fibonacci zone.

This is extremely helpful for catching retracements or reversals without staring at the screen all day.

⚙️ How to use
✅ Works on any intraday timeframe (1 min, 5 min, 15 min, etc.).
✅ Simply add it to your chart, pick your session in the dropdown, and watch the Fibonacci zone automatically adjust to your selected market hours.

Use it as a confluence tool alongside other indicators like VWAP, EMAs, Bollinger Bands, or price action patterns to time entries and exits.

💪 Why this is powerful
This is more than a simple Fib retracement tool:

It dynamically adapts to the previous day’s sentiment, helping you trade in alignment with recent market psychology.

The session filtering ensures your charts are focused only on the periods