Session Sonar [OneShotAlgo]🟠 Overview
Session Sonar projects forward-looking volatility envelopes from each major trading session open, helping you visualize how far price could realistically travel from that session anchor over time.
Each session begins with a set of concentric rings expanding forward in time. Inner rings represent shorter horizons such as 1H, 2H, and 4H, while the outermost ring represents the expected envelope by session close.
The rings are based on current hourly volatility, not chart-timeframe volatility, so they keep consistent meaning whether you are viewing a 5-minute chart or a 1-hour chart. Ring size expands with time using a square-root scaling model, which produces more realistic envelopes than linear expansion.
🟠 How to read it
Price reaching outer rings quickly suggests the session is moving faster than typical volatility.
Price remaining inside inner rings suggests a more compressed session environment.
The glow line traces price movement from session open to the current bar, giving a quick visual read on session development.
This tool is not directional. It does not predict whether price will move up or down. It is a visual context tool designed to help calibrate expectations around distance, pace, and session development.
🟠 Sessions
Asia
London
New York
Daily
Each session has its own color and configurable UTC timing. Asia, London, and New York are enabled by default for a clean intraday view.
🟠 Implementation notes
Uses hourly ATR for consistent envelope sizing across chart timeframes
Small rings auto-hide when they would render poorly on the current timeframe
Previous session anchors fade gradually so you can still see how earlier envelopes played out
Works across forex, indices, commodities, crypto, and other liquid markets
🟠 Suggested timeframes
Best suited to intraday charts, especially 1m to 1H. On higher timeframes, session boundaries become less meaningful and some shorter-horizon rings may not render.
🟠 This script does not
generate entry or exit signals
predict direction
guarantee that price will remain inside any ring
Outlier moves happen, especially around news or in strong trend conditions. Session Sonar is a visual decision-support tool, not a trading system.
🟠 Customization
Ring horizons, envelope scale, fade duration, smoothness, minimum horizon-to-timeframe ratio, session colors, and all major visual elements can be adjusted in settings.
Wskaźnik Pine Script®






















