The graph on the left shows the RTSI for Alexis Grace over the last few days. The one below shows the one for Danny Gokey.
It essentially shows a set amount of internet noise for each contestant. If one gets more interest the timescale on the X-axis will be reduced.
Firstly, I am new to analysing these plots so your guess is as good as mine.
However, I reckon Danny made a much bigger impression during the show. Alexis caused a bit of a surprise in the results show but Danny has had more enduring popularity since the results show.
These graphs are difficult to analyse (due to the variable x-axis) so any help is appreciated.