All the items listed in the poll contribute, but after working with a great number of traders, I can see that it almost always comes down to lack of discipline.
If I could vote for one of the above for everytime I've lost money or I've seen another trader lose money, the lack of discipline bar would be off the chart. It so outweighs all the others.
For the most part, the traders that lose money do so because they simply don't do what they said they were going to do. They have the basic concept, they have some strategies, they know what they are supposed to do, but they don't do it.
Some lack of displine activities:
- Adding to a losing position when it's not called for
- Not cutting their losses when they said they would
- Not exiting a trade when they said they would upon entry
- Trading larger size than they said they would
- Changing their strategy in mid-trade
I could go on and on, but if traders would simply do the following, they would save themselves a LOT of $$$:
- Know why they are getting in a trade and when they should get out.
- Upon entering a trade, follow through and do what they said they would do at the time they entered the trade.
- Enter a trade when they see the conditions they were looking for have been met.
No matter what maxims you throw out, no matter what great strategies or tactics someone has, they are all for naught if the trader doesn't disipline themselves and apply them when they should.