For MT4 I recommend this renko sold on this site:
https://ovo.cz/products/offline-charts-for-mt4/renko-bars/
For MT5 I recommend this renko sold on MQL5 market:
https://www.mql5.com/pt/market/product/29005
I personally use both products I mentioned above.
To make a simple EA like mentioned on the first post, you have to simply use a condition box to compare how the last candle was closed:
If Close of Candle ID 1 is > Open of Candle ID 1 = it was a up candle -> open buy position
If Close of Candle ID 1 is < Open of Candle ID 1 = it was a down candle -> open sell position
While it is simple to make such EA, it does not mean it will be profitable...