Of course, you're right.
For me, this further reinforces the issue that are the same indicators cited by SAL.
As can be clearly observed in the seller's video in the first 30 seconds the arrow is also drawn after opening the candle.
I've taken a little longer of my time to put together one more indicator, leaving it even more similar to what's being sold on youtube.
All the indicators I used were extracted here even from the community, all free is just a matter of adjustments.
My intention here is just to help, please let me know if I'm doing something wrong.