Thoratec Corp (THOR -$1.94 or -4.31% to $43.03) suffered a considerable loss today on light volume, just barely violating its 50-day moving average line amid widespread market weakness. Its recent low ($41.27 on 7/01/10) defines the next important chart support level to watch now. It struggled initially after breaking out from a choppy 5-week base with a considerable gain on 6/02/10 backed by above average volume. Then it posted a solid gain on 6/16/10 for a new high on above average volume, reconfirming the earlier technical buy signal.  On 6/16/10 it marked its $47.93 high, and its short-term average acted as support since it was last reviewed in this FSU section on 6/23/10 with an annotated graph under the headline "Medical Products Firm Showing Resilience."

Recent quarterly comparisons showed impressive acceleration in its sales revenues increases while earnings above the +25% minimum guideline satisfied the C criteria. Based on weakness it was dropped from the Featured Stocks list on 2/23/09, yet it has shown especially bullish action since its breakout on 3/05/10. It was mentioned long ago in a 12/15/08 interview on WBBM 780AM - (listen here) and it was featured in yellow in the 12/05/08 Mid-Day Breakouts Report (read here).  THOR had rebounded impressively after being featured in the past, then subsequently dropped from the CANSLIM.net Featured Stocks list on 2/2/2006.