A seasonal pattern is a recurring price trend that repeats itself in a calendar year.
For example, if Microsoft's stock has risen from mid-October to mid-November every year for the last ten years, that is a seasonal pattern.
Seasonality provides an advantage in strategic decision-making when trading on the stock market by determining the likelihood of a profitable trade.
Investors need to consider the seasonality of price movements as they have a major impact on the overall portfolio's performance.