Quote from Swan Noir:
Rabbitone, I have been following this thread with interest and I appreciate how clearly you lay out your thoughts and practices. And kudos to Abbitia, his fine questions help illuminate the topic.
I am not sure I understand why you consider a 4% loss in a week devastating for a day trader. I currently day trade NQ and a handfull of currencies in a small account and have had weeks where a 6% loss, because it was within my plan's parameters, did not shake me. I didn't like it but it was not an albatross.
Obviously a small account generally takes a higher percentage risk than a larger one and subsequently runs a higher risk of ruin. As in most businesses being under capitalized accounts for both a great many failures and the occasionally dramatic story of great success from a humble start.
Although I wouldn't go so far as to think of it as an edge, I have learned to take my losses quickly (miss some great trades) and live to fight another day. An asset -- an inportant tool -- but not an edge. When you are light on capital you must master taking a quick, small loss and not dwelling on the ones that get away. The two realities go hand and hand.