@David: Yes, it happened one time that a running strategy that even had an open trade was suddenly stopped and the position closed. Sometime (maybe 30-60m) someone from IG rang me (without me doing anything before) and told me that my strategy was stopped because of a bug in their (IGs) system. He apologized for it and said if i had lost money (my position was closed with a small profit), I had received compensation.
Other times when a strategy i was running was stopped “due an error” I received no phone call but in that cases the strategies had no trade open.
And yes, I also got the error message that a strategy was stopped because the price couldn’t be confirmed. When this happened there was no extrem volatility going on. At least have my strategies performed well in situations of much higher volatility. Yesterday for example when the USD/JPY came down really hard one of my bots opened a position and took profit directly after only 13s. This was interesting to see because it made obvious that PRT (or at least what you see of it) is lagging massively. I got the confirmation from IG on my mobile that the position was close before it even happened on my screen. But anyway internally all was processed correctly inspite of the fast move.
I think it is obvious that sometimes PRT and IGs system are not completely in sync and this can cause different sorts of errors. Then I’m not sure what one can do about it.