eminifan

I've been into trading on and off for around six years now, I've read several books, did my share of virtual trading, read everything I could find online about the subject. I had moderate success with stocks, though it's been a while since I've actually traded, and for the most part everything went as everyone said it should for a newer trader. However, I've recently been turned on to e-mini futures. I've been using ninjatrader to replay days for practice, in all I've replayed over 30 days. My problem is that from what everyone says my profits aren't reasonable, I trade TF with only 2 contacts at a time and on average I make between $300 and $600 a day, with my worst day ever I only made $60, and on my best I made $1100. Are those numbers realistic or am I maybe using the software incorrectly or something?