The morning star can work for day trading but it is far more reliable on higher timeframes than on intraday charts. While the morning star pattern can be reliable on longer timeframes like daily or weekly charts, it may be less reliable on shorter intraday timeframes due to increased noise and fluctuations.
Higher timeframes, such as daily and weekly, are more reliable to trade morning stars due to less market noise.
If you day trade it, stick to the 4-hour, demand a gap-down star, a strong bullish third candle closing above the first candle's midpoint, and confirmation from volume and key support.