Group 1 - Costco Wholesale Corporation is experiencing quiet trading, but a popular trading model has generated a 'buy' signal, indicating a potential new uptrend [1] - The recent trend analysis shows that the 10-day average closing price has surpassed the 20-day average closing price, suggesting a possible upward movement for Costco [7] - Trend-following strategies are being utilized to determine entry and exit points based on specific price analyses [1][2] Group 2 - A moving average crossover model indicates that when the shorter-term average (10-day) is below the longer-term average (20-day), the stock is in a downtrend, and a crossover generates a buy signal [6] - Historical data shows that previous buy signals in January and April were accurate, followed by sell signals in March and June [6] - The current situation may signal the beginning of a new uptrend for Costco, as indicated by the recent price movements [7]