The simulated feed on Ninja is as far as I can tell very good. I once had considerable slippage on ES on demo and wondered if the feed was off in any way, but checked the time and sales and could indeed verify that the market had moved very quickly through my stop on low volume. The difference between simulator trading and live trading is that with the first you're not risking anything, but with the latter you are. And the more you risk - the worse it gets. If you're a wealthy guy with some fun money to blow off it's not likely to cause much worry, although it still could as nobody likes to lose. But if you have a small account that you'd really not like to lose and where the outcome of your trading operations may mean the difference between life (independence/wealth) or death (tied down to your day job) - it's more likely to affect your emotions. Especially if you start the day with 2 losses in a row.
Sounds good. Repetition is the mother of skill. I'm glad it's working out for you so far. My best advice (which it seems you're already intent on doing) is to start very small when you go live. 1 MES shouldn't really feel that different from simulator trading. Build on that and very slowly add contracts.
My trade now is H1 long entered "buying the close" of the H1 signal bar. No S/R above to take profits, so 4700 Brooks would call "round number". My order is for a 40 point profit.
That's the "problem" yes. I see now that all point to fear as same problem. "So, first of all, let me assert my firm belief that the only thing we have to fear is fear itself—nameless, unreasoning, unjustified terror which paralyzes needed efforts to convert retreat into advance." - FDR
It's good to be conservative regarding fills on SIM trades but I've found when forward testing a new strategy with NT and CQG that the SIM algo's are quite accurate to live trades. One thing I do recommend is setting targets quickly after entry. The sooner you get in line, the more likely you get filled sooner rather than later. I have default settings in my ATM and adjust according to the parameters of the trades right after entry, first stop and then targets.