This indicator is a Renko version of the Schaff Trend Cycle (STC). It is not meant to be used alone but as confirmation tool. Buy when green arrow appears, short when red arrow appears if your other indicators agree. It works equally well on all time frames using ATR Renko brick sizes as well as when using custom brick sizes on a 1 min Renko chart. This is a version 3 script with no repainting.