One of the biggest mistakes that new traders make is to go by the crowd and rely upon collective opinion. No, as a trader it is your duty to do your own research. Dig deep into the company history you want to find, and analyse the historical performance data of the company before you choose to buy its shares. Do your own research, don’t rely on others' opinions. That is the wrong mentality, and that way you are giving someone else the reins to control your trading.