Market Session BT is an indicator for cTrader that overlays customizable trading session boxes on charts using UTC time. It visually marks major Forex market sessions—Sydney (21:00–06:00 UTC), Tokyo (00:00–09:00 UTC), London (07:00–16:00 UTC), and New York (13:00–22:00 UTC)—with options to enable or disable each session individually. Users can choose between filled zones with transparent color fills and visible borders or outline-only frames. Colors and opacity are adjustable via the native cTrader color picker. The indicator supports overnight sessions that span midnight and updates session boxes in real-time on each tick, with historical data loaded on chart initialization. Typical use cases include identifying session ranges and overlaps, highlighting periods of varying liquidity, and establishing time-based trading rules for entries and risk management. Session times can be manually adjusted to accommodate daylight saving time changes, as the indicator operates strictly on UTC. Key features include per-session settings for start/end times, box style, color, and border thickness.