It expresses the color of Heiken ashi Candle on a different time chart.
As you already know about it, If you change your chart directly to Heiken ashi, the value of candle changes. For eaxmple, moving average lines change little by little from Non Heiken ashi Candle.
I was very uncomfortable with this.
If you use this, you can check the Heiken ashi color while using a Non Heiken ashi Candle.