it would depend on what is being traded and what times. In futures markets, occasionally auxiliary markets are used to reflect a price and provide for 24 hour trading.
I use IG - havent really used anyone else to cant provide comparison - and in speaking with them was told that spreads can change within the trading period, but again, each market from their extensive range of markets is governed by its own rules, so depending on which market you trade, just do some research on that one - also call them up, they are quite helpful and will put you thru to England when Australian office is closed.
Ive made more money than lost so its working out better than the casino for me, but I like trading binaries and it sure feels like roulette!
