Euphoria – While feeling euphoric is usually a good thing, it can actually do a lot of damage to a trader’s account after he or she hits a big winner or a large string of winners. Traders can become overly-confident after winning a few trades in the market, for this reason most traders experience their biggest losing period’s right after they hit a bunch of winners in the market. It is extremely tempting to jump right back in the market after a “perfect” trade setup or after you hit 5 winning trades in a row…there’s a fine line between keeping your feet grounded in reality and thinking that everything you do in the markets will turn to gold.
This is the only way you can really stay on top of your trading. Allow yourself to make mistakes - and don't make the mistake of being scared to prove yourself wrong - you'll be in a much better position for it in the long run. You have to be comfortable with accepting that mistakes are inevitable, especially in the early stages. It's all part of the learning curve.
The problem is that this is where traders are most likely to succumb to overconfidence bias. It's not uncommon for traders to complete a winning streak and then believe that they can't get anything wrong in the future. To believe this is of course unwise, and is only going to end in failure. Make sure you always analyse your trading sessions and look at your wins and losses in detail.