Positions in USD/CHF are usually sizeable and liquidity at this time of day is poor, hence the gaps. USD/CHF triggered large trailing stops above .8850, trading to .8873 so far.
USD/CHF is often traded through the components due to lack of straight liquidity ie if you want/need to buy USD/CHF then you buy EUR/CHF and sell EUR/USD as they are much more liquid at this time of day.
