OPEN-SOURCE SCRIPT
Fair Value Box John
TITLE
Fair Value Box — Session Opening Range
DESCRIPTION
A precise, multi-timeframe Fair Value Box indicator that captures the exact opening minute's body range (open-close) at London and US market open, then extends it across the session as a visual reference.
KEY FEATURES
• Automatic session detection (London & US open times in exchange timezone)
• Captures the 1m opening candle's O/C range at exact session start — works identically on 1m, 5m, 15m, hourly, or any timeframe
• Fixed box range (no expansion during the session) — remains locked to the opening minute's body
• Two distinct box colors (teal for London, orange for US) with clean, semi-transparent fill
• Boxes grow right to track session progress; freeze at session close
USE CASES
• Identify institutional opening range behavior
• Track price acceptance/rejection of the session's first-minute range
• Reference level for scalping and intraday range trading
• Confluence with other key levels (previous day high/low, overnight moves)
TECHNICAL NOTES
Uses request.security_lower_tf() to reliably extract the 1m opening candle across all chart timeframes. Session times are timezone-aware and adjust automatically for daylight saving time.
SETTINGS
• Show Fair Value Box: Toggle on/off
• London Box Color: Customize London session box
• US Box Color: Customize US/Regular session box
• Session Timezone Inputs: Adjust for your broker's feed if needed
Perfect for traders who value precision opening range analysis on NAS100, indices, and forex during London and New York sessions.
Fair Value Box — Session Opening Range
DESCRIPTION
A precise, multi-timeframe Fair Value Box indicator that captures the exact opening minute's body range (open-close) at London and US market open, then extends it across the session as a visual reference.
KEY FEATURES
• Automatic session detection (London & US open times in exchange timezone)
• Captures the 1m opening candle's O/C range at exact session start — works identically on 1m, 5m, 15m, hourly, or any timeframe
• Fixed box range (no expansion during the session) — remains locked to the opening minute's body
• Two distinct box colors (teal for London, orange for US) with clean, semi-transparent fill
• Boxes grow right to track session progress; freeze at session close
USE CASES
• Identify institutional opening range behavior
• Track price acceptance/rejection of the session's first-minute range
• Reference level for scalping and intraday range trading
• Confluence with other key levels (previous day high/low, overnight moves)
TECHNICAL NOTES
Uses request.security_lower_tf() to reliably extract the 1m opening candle across all chart timeframes. Session times are timezone-aware and adjust automatically for daylight saving time.
SETTINGS
• Show Fair Value Box: Toggle on/off
• London Box Color: Customize London session box
• US Box Color: Customize US/Regular session box
• Session Timezone Inputs: Adjust for your broker's feed if needed
Perfect for traders who value precision opening range analysis on NAS100, indices, and forex during London and New York sessions.
Script de código abierto
Fiel al espíritu de TradingView, el creador de este script lo ha convertido en código abierto, para que los traders puedan revisar y verificar su funcionalidad. ¡Enhorabuena al autor! Aunque puede utilizarlo de forma gratuita, recuerde que cualquier republicación del código está sujeta a nuestras Normas internas.
Exención de responsabilidad
La información y las publicaciones no constituyen, ni deben considerarse como, asesoramiento o recomendaciones financieras, de inversión, de trading u otro tipo, proporcionadas o respaldadas por TradingView. Obtenga más información en Condiciones de uso.
Script de código abierto
Fiel al espíritu de TradingView, el creador de este script lo ha convertido en código abierto, para que los traders puedan revisar y verificar su funcionalidad. ¡Enhorabuena al autor! Aunque puede utilizarlo de forma gratuita, recuerde que cualquier republicación del código está sujeta a nuestras Normas internas.
Exención de responsabilidad
La información y las publicaciones no constituyen, ni deben considerarse como, asesoramiento o recomendaciones financieras, de inversión, de trading u otro tipo, proporcionadas o respaldadas por TradingView. Obtenga más información en Condiciones de uso.