Update:
15/5/07: $6.37 - $1.80 = +$4.57
16/5/07: $1.56 - $1.90 = -$0.34
17/5/07: $7.55 - $2.30 = +$5.25
18/5/07: $2.75 - $1.90 = +$0.85
19/5/07: $8.34 - $2.20 = +$6.14
20/5/07: $6.27 - $2.60 = +$3.67
21/5/07: $8.62 - $3.90 = +$4.72
22/5/07: $14.11 - $3.40 = +$10.71
>> Overall utk 8 hari: +$35.57
>> Profit margin = 178%
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