QuantOS is a MetaTrader 5 Expert Advisor that combines five independently selectable DeMarker strategies with grid position management. Four strategies open buy positions and one opens sell positions. Each strategy uses its own indicator timeframes, entry session and volume weight. Trading approach The EA trades the symbol of the chart to which it is attached. Initial entries use closed-bar DeMarker signals and predefined sessions based on broker server time. Existing baskets are evaluated on