Investopedia says, “A Renko chart is a type of chart, developed by the Japanese, that is built using price movement rather than both price and standardized time intervals like most charts are. It is thought to be named after the Japanese word for bricks, “renga,” since the chart looks like a series of bricks. A new brick is created when the price moves a specified price amount, and each block is positioned at a 45-degree angle (up or down) to the prior brick. An up brick is typically colored white or green, while a down brick is typically colored black or red”.