To view historical data collected by your Continuous testing profile you simply can click on the "Continuous Testing Results" button on the homepage.
Once clicked you should see a similar overview. Please not that the zoom field only appears on version 4.3 and higher.
This section gives you access to an analytical chart that displays all the various performance metrics recorded over time.
If you look at the image above, the left-hand menu lets you configure the chart for your specific requirements per environment. The headers let you choose what type of performance metrics you want to investigate. You can drill-down to each performance metric by deselecting the relevant check-boxes, which will remove the data from the chart. Hovering over each data point on the chart will reveal the exact value. Each metric has its own particular color, as shown in the legend above the chart itself, while clicking on one of the performance metrics in the legend will hide its displayed data.
To define a timeframe, simply click the Calendar icon located above the chart on the top right-hand side. The chart offers Hour, Day, Week and Monthly views. You can then use the time-slider underneath the chart itself to choose the time of the day (per hour) you want to investigate further. After browsing different times, you can always get back the the current hour/day/week/month by selecting the "Now" button.
There is also an option to predict application performance. This will take a look at past performance measurements and calculate what your application might perform like next. Please note that this is only possible when there is at least 30 hours of application data available.