The Heikin-Ashi technique is used by technical traders to identify a given trend more easily. BullCharts software can easily display the Heikin Ashi candles (using the menu option: Insert > Indicator).
Here is a good 50 minute presentation from Alek Jankowski on how to use and interpret Heikin Ashi in the BullCharts software.
[ref: 2021]
More information
For more information about using Heikin Ashi in BullCharts, see this BullCharts KB article: https://kb.bullcharts.com.au/knowledge-base/heikin-ashi/
For more detailed information about the Heikin Ashi technique, refer to other sources such as: Investopedia.