T212 UK data is really slow to update anyway, i think he means US stocks.
@Alpesh90 If you’re worried about the difference, use Yahoo finance or Google to watch the realtime price, then when you execute FT always finds the best price at that time. The in-app price could be as much as 15 mins behind. If you’re holding for several weeks/months it hopefully won’t make a large difference unless its a very volatile stock.