The barSTOCK system links a computer to your electronic tills, analyzing and responding to current demand for individual products by adjusting their price at predetermined intervals. Drinks and other consumables prices float up and down automatically based on actual sales and reflecting customer demand. Customers are informed of current prices through multi-media display - TV monitors projector screens and, for the authentic stock market look, LED boards. The result is a constantly evolving happy hour. Added drama can be created by a barSTOCK market crash set up by the management or a volume trigger to promote sales at times of peak or low demand.