gld must have been bought at the price above 92.8 on July 31, 2009, instead of above 94.03.
The correced bot price was 93.4 ,which takes a gap up into account.
correction
jim366 (2009-08-04 06:53:44) 评论 (2)gld must have been bought at the price above 92.8 on July 31, 2009, instead of above 94.03.
The correced bot price was 93.4 ,which takes a gap up into account.