You can overlay two or more tickers into the same charts. It can be different tickers with the same timeframe or you can use the same ticker, but different timeframes and you can apply different tickers with different timeframes. Overlayed tickers maybe placed into one chart area or you can place them into different chart areas too.

You can see the overlayed chart: EURUSD 15-min and EURUSD 60-min. Press to picture to see large image.

You can see the overlayed chart: EURUSD 15-min and GBPUSD 15-min. Tickers are placed into different chart areas, however you place them into the same area. Press to picture to see large image.