Kicking ----- I think it's nearly always best to trade the contract with the greatest volume, giving better liquidity, smaller spreads, and the most accurate possible representation of the current price. You can trade December e-Minis right now if you wish, but the liquidity and spreads will be poor. There is usually a difference through in rollover between the big S&P and big ND and the e-Minis. The big contracts roll over nearly at once, and the pit traders make only occasional adjustments ----- just every few minutes or so ---- to the price of the previous contracts, making them not only poor trading vehicles, but also contracts you would not want to use for tick-by-tick charting and indicator purposes. In the minis though, the rollover is generally smoother and more extended, and because volume and liquidity should be high for both ES and NQ contracts on Thursday and at least some of Friday, it's less of an issue. The biggest headache for me with rollover is to have to get old support and resistance levels and old Fib numbers out of my head and replace them with figures around 10-11 points higher (at current interest rates with regard to the fair-value premium). It can take a few days to adjust to the higher prices.