Hey,
It would be a nice feature to have an indicator on stocks to see if the market for it is open or closed without having to open the stock. So you would be able to see if the market is open for US/ UK stocks from your investment tab or from your watchlists.
Or as this Indicator would have to change dynamically, instead even if it stated the Stock Exchange its listed on on the card
I don’t know how useful this would be though, it opens and closes the same time each day. 
T212 also give heads up if its closed on a bank holiday or such too.
8:00am-4:30pm UK
2:30pm-9pm US (in the UK)
Pretty much just need to remember this.