Quote from whitster:
sim trading in IB's demo account is pretty darn close to real trading. i tested it extensively side by side with real trading, and its VERY close. my methodology frequently (about 70% of the time) relies on limit orders, so realistic sim is essential to testing expectancy of setups.
also, in testing YM, you can trade DIA to test your setups. the tick size is the same (unlike SPY vs. ES).
the fills are not quite as good.
simply put, if your setups work with DIA, they will work (better) with YM generally speaking. and i have confirmed that with hundreds of test trades in DIA before i ever switched to YM
ashi is right in that the right contract to trade is the one that suits your trading style/setups.
i extensively tested mine and they work better in YM, which is one of the reasons i trade it almost exclusively.
i've made this point before, and i'll make it again. unless you are trading significant size, and i'm sure you are not, YM is better than YM in terms of spread ie cost effectiveness. for MOST setups this makes YM the better choice. but do the testing and find out for yourself.
NQ and russell, etc. are not closely correlated with the ES/YM complex, so they may be better, regardless of spread.