If you have a lot of tickers on your watchlists, you can find one quickly by searching for it. If you don't currently have the symbol on any Watchlist, the search result allows you to add the ticker to the active watchlist.
To search for a symbol on one of your watchlists
The watchlist that contains the specified symbol opens with the ticker for the symbol expanded to display a mini-chart, Position, P&L, Bid/Ask and High/Low price details.
If the symbol is not currently on any of your watchlists, you will have the option to add it to the current watchlist.