Hi B&L,
I feel this is related to a new order in the opposite position first cancelling the running position (no matter the quantity of it) before the new order can be given to the exchange.
Please read the above a couple of times, because it is hardly visible (and not intuitive) that it happens like this.
Crucial for understanding : there can’t be a Short and Long position at the same time in one System.
When you’d have 1 position Long and a Limit is triggered for a Short of 1 position, a Market order will first kill the Long position. Most probably this Market Order will lag (because a buyer needs to be found) so it will (a kind of coincidentally) show up in the next candle when the event of the Limit was triggered close to the end of the bar (like last second).
When you’d have 1 position Long and a Stop is triggered, all bets are off because that implies a Market Order in the first place. At least this is so complicated that I would not dare to write it out (but Google Limit vs Stop and you will see it is described everywhere).
I’d like to bet you (but I may lose) that all is perfectly normal but that it is about misinterpretation of what actually happens at the exchange (vs broker, I’d say). I am also pretty sure that you know very well what you are talking about. However, miss one detail and things may become incomprehensible. 🙂
The strange thing is that the ID on PRT on that case after the DI********_C for “close” in this case adds a DI******_c_1
Although this won’t be the situation you largely described, you should try to call the IG order desk and ask them what the _1 addition means. You will get an answer and from there you will start to understand what is happening. I think I can already tell you that this is about what I described in my first lines above : an IG injected order to first set things straight (can’t have Long and Short at the same time).
I hope you keep us posted with what you find.
Regards,
Peter
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