I am using TWS ChartTrader, and price is passing right through my stop loss and nothing is happening for several seconds (sometimes 30 seconds or so)! Eventually, the stop order executes (at a terrible price). I spoke to a tech and he said to take a screenshot next time this happens. I have set my stop trigger method to LAST (rather than the default of double bid/ask). I'm trading liquid stocks (daily volume > 1M). Has anyone had this problem? PLEASE HELP! Thanks much!