How come my stop/limit order is not executed, when the market has already reached the level I have specified?
One reason may be that you have been watching the rates on the charts, which have been set to display the average bid/ask rate. E.g. if the highest EUR/USD value at a certain period was 1.2654 on the charts, then the real the bid/ask quote might have been 1.2652/1.2656. Another reason could be that you were viewing the chart before the stop/limit order was placed.