The icon at the bottom middle of your screen indicates all instruments you have chosen to follow. This is called your Watchlist.
To sort your watch list by opportunity or alphabetically, tap on this icon .
To add additional instruments, click this icon at the bottom of your screen.
You can filter your watchlist by clicking on the categories at the top of the page: All, Favorites (denoted by ), Futures, Forex, Stocks, Gainers, Losers.