Peedee,
Don't start trading the mini-dow contract without reading the 'spikes' thread on here.
I don't think it's fair for anyone to get involved without knowing the real risks.
But if you take my advice you'll start trading the US markets with a spreadbetter at the cheapest stake that still makes it 'interesting', and go for the bigger moves. I've not used IB, but it's not the easiest thing on the eye, and that does matter when it's all going wrong and you're starting to flap.
Cheap commissions+scalping can mean a good caning. That thing moves like lightning, and good TA ain't going to tell you anything when the floor is running the stops.
To be honest, I don't know why people trade the Dow when the S&P is the biggest index in the world. Because it's got 500 stocks, it gets whipped around less than the Dow.
It still gets ripped around by the floor though.
Beware, it's not easy.
(Just seen your last post. It's not just the feed/platform/hand speed mate, it's the brain. Not taking the piss, but I've been spreadbetting the S&P for two years and it still batters me some days. The US markets are quick, and you can know what's going on and still get stopped out in a blink. I regard myself as a novice at it still).