I know that there are many investors (including professional traders) who are less willing to cut losses at -2% than taking profit at +2%, but is it the only reason?
Psychology and one trader will have a different reason (the mind) why their losses tend to be larger than their winners.
Someone posted here once at Elitetrader.com a psychological diagram of how we think as a person when in a losing situation versus how we think as a person when in a winning situation. The mind really reacts differently and the longer someone is not a profitable trader...it becomes more difficult to change or stop that cycle of behavior (reaction) to a losing situation versus a winning situation.
In fact, there's been studies in the past 10 years that specifically show that women and men react differently in losing situations and react differently in winning situations.

Your exposure should be zero when you don't know what you're doing.Any tips on how to shake it, please share.
Honestly, I have no problem if my losing trade is much larger than my winning trade, this all boil down to the risk/reward vs win/loss ratio. I am completely OK if a system allow me to make $1 or loss $6 in each trade, IF my winning ratio = 95%![]()
I have been going through that losing thing for the last 8 months, and having a horrible time shaking it. Done lots of studying, pull back on $ amount traded etc. Any tips on how to shake it, please share.
The crazy thing about it, for the first 2+ years, I could do very little wrong. It was like magic.