Hi Pipshunter,
I'm not certain we can assume they risked 50% with the numbers you have given. With 10 minis and $2000 in the EUR/USD, they would be risking 50% of their account if their stop was 100 pips back from entry.
If their stop was only 20 pips back from entry, they would be risking 10% of their $2000.
Of course, 10% is still a lot by industry standards!
L