Putting price and time zones on chart under W.D. Gann method is called “squaring”. The box can be built through squaring of both price and time. The best performing square is the square built according to Gann's arithmetic patterns. As per Gann methodology, box is a pattern chart.
Those charts are called pattern charts, because for building them Gann takes a certain size along X and Y, size of charts is closely connected with Gann cycles. The most popular pattern charts are “Square 4”, “Square 144” and “Square 360” a full cycle. The number in name of chart means the number of periods as per price and time. There are a few ways of building those charts.