Pick how many charts you want on screen, choose a pair in each one, and set the timeframe for all of them together. Everything is saved in your browser, so the layout you build is the one you come back to.
Choose your grid. The 4, 6, 9 and 12 buttons set how many charts appear. More charts means smaller ones, so pick what your screen can read comfortably.
Change a pair. Use the dropdown in any chart header. Each chart is independent, so you can compare Bitcoin against three altcoins, or watch twelve different markets at once.
One timeframe for all. The timeframe selector at the top applies to every chart, which is what makes comparison meaningful — the same window of time, side by side.
What you are looking at. Green and red candles show each period's open and close, the bars underneath are volume, and prices update live. When most charts turn the same colour at the same moment, that is a market-wide move rather than news about one coin.