Maybe I am fated not to trade futures today. I am having couple of problems with Tradestation as mentioned in my Twitter. First, charts were frozen, right before the sell off.  So I missed the sell setup. Secondly, my OSO orders was rejected when I was trying to short NQ, and, it did not cancel my BUY stop order !?!?(the stop loss order). I was lucky enough to find out that earlier and cancel it manually.

I am going to clean the cache of Tradestation now. I guess, I am not going to trade futures today. I have a couple of FX positions now.