This is based not on support lines, but on pivot prices. I used both long-term 'standard' pivot points and 'Fibonacci' pivot points. To learn more about pivot points read:
"Using Pivot Points For Predictions" http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:pivot_points http://www.investopedia.com/articles/technical/04/041404.asp
Considering how my $220's prediction played out, I agree with your lines. My personal ones are a bit more conservative (I favor some other market sentiment indicators) but my prices are relatively in the same spot.
"Using Pivot Points For Predictions"
http://stockcharts.com/school/doku.php?id=chart_school:technical_indicators:pivot_points
http://www.investopedia.com/articles/technical/04/041404.asp