If the brokerage confirms that they received a cancel all positions, then you won't recover anything. My brokerage platform recorded all key strokes and most traders didn't know that. Lots of people use it. Good trading plans account for all possibilities - like my plan if my WI-FI drops (as has happened). I drive to one of 3 local places at which I have access and tested my trading platform and close all positions as needed. Computers can fail, phones can fail, cables can fail, medical emergencies can happen etc. Everything must have a mitigation plan. One PITA of windoze 7 is the mouse hops all over the place at times. I have had it close my browser page on its own when it hopped to the close button on my browser. Some platforms require a trading password or confirmation. Think carefully before removing that final protection. Sorry to hear you may have lost some money but what doesn't kill us makes us stronger.
Look when I traded futures, believe me I understand working with all contingencies. But in this situation, this was more like purchase and forget, especially SDRL, SDR, TPRL, and off course had only been monitoring SFY which started today at 13%+, that is the reason I looked at the account. Yes, it could be worse, I could be trading from Odessa, my vacation to Nigeria is still on, and my future is guaranteed with state quarter collections and baseball cards. So no point dealing with additional brain damage, although I do plan to add this acct to IB. I will you let you all know what transpires , what MB trading does say, still early in CA.