onmargin - if I read it right, your stop was at 11.20 but you actually got stopped out at 11.00. That's 20c slippage. That wouldn't normally be an issue - but your stop placement looks a bit off...
Looking at this chart - QID on top QQQ on the bottom, I would hazard a guess that you entered this trade when the market started to drop, trying to capitalize on the move.
It looks like you got caught out when the market was back on it's way up. I would agree that this price spike looks odd but I would bet that if you looked into their literature, you will probably find out why. These ultra-shorts can go to zero in a day - this is not generally going to happen on a QQQ ultra short but on something based on a more volatile market it's possible.
So - I think the spike is very large, I think it was actually in the right direction - Qs had an up bar, QID had a down bar. I would be poring over the ETF documents to see if this spike is against their 'rules' so to speak.
I have to say - without knowing all the details, it seems to me that your stop loss placement - which is probably at least $6 from your entry point (that's my guess) is the real problem. It is a real shame it got hit - in this case, your stop loss was worse than no stop loss.
I would have a chat with your broker - they are cancelling trades and they might cancel yours on the basis that the price move from $17 - $5 is larger that the 60% being quoted. From the letters I've seen from the market - there is going to be 'en-masse' trade reversals and there's a chance that yours will be one, regardless of the fact your stop loss was where it was. I think this will be on the bases of the move to $5, not on the move past $11.
I sincerely hope you get lucky on this one. If so - promise us you won't ever do that with a stop again ! :clover: :clover: :clover: