NT7 has all the bells and whistles but isn't robust
I started using NT7 while it was still in beta because NT6 was just incapable of doing what I wanted.
I'm a mechanical trader so my crucial operations are running the systems to trade. I've been doing that for about six months now and I'm happy that NinjaTrader can hack it - but then, I know all the places to give it a tap and all the times to sit there and massage it through a bad patch.
Frankly, NT7 could be much more reliable.
