what is vertical line charting 
vertical line charting is a technique used by technical traders and market technicians to track the price moves of a security in vertical line charting the price action over a specified period is summarized by a vertical bar the security s high and low prices for the period are denoted by the top and bottom of the line respectively while its opening and closing prices are indicated by short horizontal bars to the left and right of the vertical bar respectively vertical line charts are more commonly called bar charts 