The best time frame to use depends on your Trading Style and Trading strategy, - Scalping Trading , Day Trading, and Swing Trading.
Use higher time frames ( 30 min, 1H, 3H ) for trend confirmation. Use lower time frames ( 3 min, 5 min ) for entries and exits.
First Half (9:30 AM – 11:30 AM) High volatility, best for momentum trades. Ideal for scalping and quick breakout trades.