It would be easier to just have two accounts, I just opened up a Zecco account and put some money in it so it will clear soon and i can start buying and selling.
That way there will be no fee for transferring your account plus it would be quicker than doing that.
To transfer E*trade its 60 bucks which i honestly don't feel like paying and Zecco doesn't reimburse that unless its over 25,000 dollars i think which i don't have in my account right now.