It is by far the simplest on chart presentation of Gann square of 9. It calculates the levels based on previous day closing. These levels usually acts as support and resistance.
リリースノート
This is by far the first on-chart representation of gann square of 9 levels based on previous day closing price. These levels can act as support and resistance.
UPDATE (Nov 06, 2024): Added label over lines for ease of use. Thanks Umesh for this suggestion