It calculates the HA values,and plots green or red coloured dots.
1. Add the indicator on the chart
2. Start unchecking the first and then the second option.
3. You got that ;)
If you need more than 3 consecutive candles,please complete the code. Everything is self-explainatory.
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.