To do this, simply apply the indicator to a chart and right click onto one of the arrows plotted. Choose "Add alert" and then "Long opportunity" and "Short opportunity" in order to create the two alerts per instrument.
Buy signal is generated if a renko brick is followed by a brick.
Sell signal is generated if a brick is followed by a brick.
In true TradingView spirit, the author of this script has published it open-source, so traders can understand and verify it. Cheers to the author! You may use it for free, but reuse of this code in a publication is governed by House Rules. You can favorite it to use it on a chart.