It is a Heiken Ashi candle overlay. It has a selectable moving average before HA calculation and another after HA calculation, to smooth original Heiken Ashi candles.
It can be used:
Detecting Short/Long term trend direction
Dynamic support/resistance, not just a line, but it has a height
Trailing stop
Trend reversal detection, when price cross above/below Heiken Ashi candle
A lot of moving averages can be selected to adjust it to the selected market.
It uses my TAExt library, so you can use it in your strategies as well.