With $100 you need at least a 30% profit. If you're using eTrade here it how it would look in 12 trades:
1. $100 + 30% - 9.95 buy and sell = 110.10
2. $110.10 + 30% - 9.95 buy and sell = 123.23
3. 123.23 + 30% - 9.95 buy and sell = 140.29
Now you can either choose to keep gaining 30% or aim for 20%. Lets say you went for 20%.
4. 140.29 + 20% -9.95 buy and sell= 148.45
5. 148.45 + 20% - 9.95 buy and sell = 158.25
6. 158.25 + 20% - 9.95 buy and sell = 164.00
7. 164.00 + 20% - 9.95 buy and sell = 176.90
8. 176.90 + 20% - 9.95 buy and sell = 192.38
9. 192.38 + 20% - 9.95 buy and sell = 210.95
10. 210.95 + 20% - 9.95 buy and sell = 233.24
11. 233.24 + 20% - 9.95 buy and sell = 259.99
12. 259.99 + 20% - 9.95 buy and sell = 292.09
So in 12 trades, your account went from $100 to $292 or 192% return.
If you still wanted to use $200 dollars, basically you will skip 8 trades based on the chart I posted above.
As for ERBB it closed up on Friday, should be a good sign it will continue into next week.