Say I have an account with MtGox, and I put $5k worth of bitcoins in there. The exchange rate subsequently goes up by 10%. Now my MtGox bitcoins are worth 5.5k. Can I exchange this for USD in my MtGox account, but let it sit in my MtGox account until I want to buy bitcoins again?
The reason I ask is because I am in Australia, and MtGox charges a $10 fee (plus the 0.6%) to send to my bank account, and more importantly, it takes a few days to transfer. This means if I choose to buy BTC again, I have to transfer money from my bank account back into my MtGox account which also takes a few days. That's a turnaround time of almost a week, which would make "day trading" impossible!
Can I have usd in my MtGox account without transferring it to my bank account, or having it in bitcoins?
I'm a newbie, obviously...