The best way to read opponents online is to watch their betting patterns. Look for players who consistently bet or raise the same amount. If someone always bets 2x or 3x the big blind preflop regardless of their cards, you surmise they're likely playing a looser, more aggressive style. Players who vary their bet sizing likely have a deeper understanding of game dynamics. Players who snap-fold or snap-call almost instantly likely have strong reads on their own hands but little feel for board texture. Players who take more time before acting are likely to think through multiple variables before deciding...