Session Open Lines and Bar Counter is a customizable trading indicator designed to automatically plot key price levels and session information on charts. It auto-draws the Open, High, and Low prices for daily, weekly, monthly, and yearly periods, with options to customize colors, line styles, and label positions. The indicator includes a session candle counter that tracks the number of candles elapsed during major trading sessions such as New York, London, or Asian, with user-defined session start and end times. It also automatically plots psychological round numbers and key time markers to highlight critical price levels and trading times. Features can be toggled individually to reduce chart clutter, consolidating multiple indicators into one tool. This indicator supports various markets including Forex, Crypto, Indices, and Stocks, and is designed to be lightweight to avoid performance issues even on low timeframes. It is useful for traders applying price action, liquidity concepts, and market structure analysis.