Just remember when you SB you're not actually trading the market. The SB firm is effectively a shop and you buy and sell in the shop, at prices the shopkeeper sets. If he sees a bunch of people running down the road towards his shop waving £20 notes and shouting that interest rates are down and they need to buy somethng, do you think he will immeditaely drop his prices? Why? By now he's already got people banging on the door wanting to buy. Once the rush is overmprices will get back to normality.
As far as overnight is concerned SB prices are pushed out by biases so far in both directions that I usually cancel or widen out my stops out of market hours. I have been pointlessly stopped out by meaningless spikes too many times. Also had entry orders triggered and immediately followed by a reversal. Annoying when this happens while you're asleep. Its not that they are stop-hunting for you personally - their quotes have to reflect the futures market, even when the underlying stock market is closed. But don't think that just because the FTSE closed one night and opened the next at the same level that the SB quotes stood still overnight, they will not have.
As far as overnight is concerned SB prices are pushed out by biases so far in both directions that I usually cancel or widen out my stops out of market hours. I have been pointlessly stopped out by meaningless spikes too many times. Also had entry orders triggered and immediately followed by a reversal. Annoying when this happens while you're asleep. Its not that they are stop-hunting for you personally - their quotes have to reflect the futures market, even when the underlying stock market is closed. But don't think that just because the FTSE closed one night and opened the next at the same level that the SB quotes stood still overnight, they will not have.