SessionFlow shades the chart by the Asia, London, and New York sessions and tracks each session's high, low, and range live, locking previous-session levels as fixed reference points. The signature Asia range box highlights the classic London-opening breakout reference, while non-repainting alerts fire on closed candles when price breaks a prior session's range. A clean dashboard surfaces server and UTC time, session countdowns, and full level readouts, giving intraday traders well-defined, time-filtered trading windows.