It's been 5 weeks since the incident and I don't have my money neither any clear answer. My last email to customer service is ignored for over a week. I will describe what happened on 18th of September 2007. I will refer to my local time (GMT+01, EST+6). I attached the log file from that day as well. Before I went outside the house around 16:45, I left my TWS running as usual since I have charting programs running during the day. I made sure all my positions are closed and that I don't have any working orders and I went outside the house. I came back home just before the US rate decision and found a opened position -66 GBP DEC07 contracts and few other Forex working orders. I canceled the Forex orders and I flattened the -66 GBP DEC07 position for a huge loss (over $52000). Looking at the audit trail, the order was filled 17:48.58 my local time. After studying the detailed log file I found something interesting. It seems my TWS was disconnected at 17:46:32 and then it reconnected at 17:48.52. After it reconnected it loaded account details and it sent some orders. It send order id=1994424730 SELL 66 GBP DEC07 at 1.9889 stop 1.9889. I'm not aware of placing such an order during the day but earlier that day at 10:30.01 I submitted a basket order and one of the orders in the basket was sell 66 GBP DEC07 at limit 1.9889. I don't know what is the connection between these orders. So I really have no idea what went wrong and why was there after reconnecting submitted order id=1994424730 SELL 66 GBP DEC07 at 1.9889 stop 1.9889. Examples from the log: "RB 17:48:58:598 AWT-EventQueue-0: Performing intelligent order recovery." ..."RB 17:48:58:671 AWT-EventQueue-0: Intelligent order recovery order: id=1994424730 mod=0 liq=false sym=GBP state=jfix.FixOrderState$Inactive acct=null cum=0 conid=39656827 exch=GLOBEX compExch=null best=null time=null secType=FUT basket=Basket Window 2 ddeId=12966 avpx=1.7976931348623157E308 SELL 66 at 1.9889 stop 1.9889 jfix.FixOrderState$Inactive"... Then it says: "RB 17:48:58:668 AWT-EventQueue-0: Saved Order: id=1994424730 mod=0 liq=false sym=GBP state=jfix.FixOrderState$Submitted acct=null cum=0 conid=39656827 exch=GLOBEX compExch=null best=null time=null secType=FUT basket=Basket Window 2 ddeId=12966 avpx=1.7976931348623157E308 SELL 66 at 1.9889 stop 1.9889 jfix.FixOrderState$Submitted BasisPoints=1.7976931348623157E308 FacilitationPct=2147483647 StockRangeUpper=1.7976931348623157E308 TriggerMethod=Last CrossOrderId=null BasisPointsComputationType=2147483647 TriggerOutsideRth=true CrossQuantity=2147483647 StockRangeLower=1.7976931348623157E308 ReferencePriceType=None AllowedOrderQuantity=2147483647 null RB 17:48:58:668 AWT-EventQueue-0: Corresponding CCP known order: NONE" I was dealing with a customer support regarding this and was getting answers like "... still looking into this issue, I will keep you updated. " "I am working with out top programmers on this issue, I hope to have more information for you tomorrow. " After almost 4 weeks I finally got some answer : "After analysis of the TWS log files and FIX messages for the orders sent it appears that an inactive order was retransmitted, possibly when you executed a basket. The executed order clearly has your username ..." Basically saying it's my fault and not theirs. Wow, so they needed almost 4 weeks "working with their top programmers" to tell me what I read on day 1 from my log file. That the executed order has my username and that the order was sent from my PC. They completely ignored that: -the order from earlier that day to sell 66 contracts was rejected (a fact from the log) -I didn't have any working orders and I wasn't even at home during the execution -and most importantly that execution occurred exactly after the TWS reconnected after lost connection even the order was marketable before (mentioning some "Performing intelligent order recovery." in the log) So I sent following email which is unanswered and ignored for over week: "CS name, the GBP order was rejected, it clearly shows in the audit trial. There isn't any other entry in the log showing I resubmitted the order. Please point me to it if you think otherwise. However what is most important here is the fact that the execution occured exactly after the TWS reconnected after lost connection. If I submited the order as you said I did, why wasn't it executed earlier? The order was marketable so it doesn't make any sence. So I think there is some software glitch in "Intelligent order recovery" or something to do with handling orders after TWS reestablishes its connection." So after a long story, here is my question: What to do next since IB arrogantly said after 4 weeks what was clear the very first day and they don't seem to care to figure this out, basically ignoring me? I have been quite patient considering the $amount involved. So what next, should I contact authorities and sue them? Any ideas with this would be appreciated.