I use Tradestation also. It’s amazing. A few months ago I was in Denver getting my pilots license so in the mornings I would go to starbucks and trade before my lessons. I made 70k in a month trading nat gas. Got home and gave it all back in two weeks. Just cause their mini’s doesn’t mean its not still huge leverage (as I’m sure you know).
I love playing around with the automated trading but all “things” I believe trade differently which means you can only develop a system for one stock or contract. Then if you can find one that works eventually that “thing” will eventually start trading differently as well.
Even though net/net I doubt I made much if any (especially when you include tax implications) I love the challenge the market brings and I’m confortable my core holdings will do well.