Are you looking for a dead simple calculation of the Heikin Ashi candles as they are calculated in tradingview? Here it is!
I was looking through the library and I saw that many have come up with a lot of awesome scripts using heikin ashi candles. But, I can't find anywhere that had the straightforward simple version of how Tradingview calculates them. This was a problem for me because I realized after punching the formula in that TradingView doesn't calculate HA candles in the original way.
You might say they don't calculate them the "right" but, spoiler alert, there is no right in trading. You can only be rational or irrational as you make money or lose money.
This is useful to me for building out some portions of an algo that are not going to be compatible with the built-in function. It happens. So, if you were looking for it too, hopefully it saves you some time.