This is not an acceptable explanation for me unfortunately, I am fully aware of the need to move spreads and I had accounted for that. Especially at the open of a market, but your spread was totally unreasonable the spread on DEC contracts is already at 130pip standard, to increase it to 400pips and hold it there even after 5 mins of trading. As my execution was a 09:06 the main market volatility had already been accounted for.
So disappointing after 6years being a customer and on a profitable trade as well: