I admit, I'm one of those people who have a good day, and then get out the calculator and start adding up how much you'll make in 6 months if it keeps going good like that.
Some years ago, I made $530 scalping eurusd using bollinger bands on short term charts. After the day was done, I couldn't wait till tomorrow. Guess what. The BB strategy did not work, and I lost $500 the next day. I did make $30 over 2 days though. LOL