Our Bitcoin Ticker gives you indications of price trends through colour changes and a small arrow next to the price.
BTC Prices trending UP
BTC Prices trending DOWN
So if you have the ticker running full screen, you can move away from your PC and just want for the main price to go RED or stay normal, depending if you are looking to buy or sell.
Please read our disclaimer on prices, we draw these from the market sites so do not use them in isolation to make financial decisions.