The square on price
calculates price support and resistance levels while square on time forecasts
market reversals or reactionary days, weeks, months or even years, depended on
the time frame of reference.
Besides, W. D. Gann also
used another type of Square extensively, which was called Square of Nine.
Square of Nine combines 9 units of price and 9 units of time to form a square
with 81 cells. This Square chart also provides traders with market supports
and resistance, both in price and time dimensions.