Hang on a second. This MT4 screenshot shows a 1M EURCHF chart on the closing minutes of last Friday and the first minutes of last night (Suday opening).
So, its not that strange to see these spikes (80-90 points/ 8-9 pips) during those hours, especially in EURCHF.
Perhaps they forgot to set the number between 4 and 5 digits. :). The spike you mentioned more or less 9 pips (90 points). 5 pips when opened and 4 pips when closed. In my experience, as I noted, when I opened an order, it is opened beyond the spread ... I mean the spread is frequentlyslightly higher than it should.
That seems very strange, but how do you know that these spikes are visible only on your charts?
And don't forget that we are talking late Friday, early Sunday opening here.
at this time in the market on the eurchf there was no gap and no movement like this
ask your broker why this on your account
Then sit back and wait - and tell us if you don't mind.