Charts for our Renko Chart Generator blog post. For all featured apps, we generate simple price change charts to easily detect the price fluctuations. Microsoft has built-in support for Renko charts. All other Renko charts, with other chart apps, are emulated. Steve Nison described in detail Renko charts in his Beyond Candlesticks reference book, in 1994. These charts use data from its exercise left for practice, with a Box Size of 1.