This indicator was made by a Russian coder based on observations for a 15-minute chart that sma with a period of 206 crosses the pivot of the day when the price turns. Personally, I prefer lwma with a period of 240 as in the picture.
240 on the 15 minute chart is exactly half of a trading week of 2.5 days.
It is obvious that there is a deviation in the market equal to the ratio of half the trading week to the pivot. Maybe those who are well versed in mathematics will be able to identify such a pattern even better and make very good indicators for such a basic