Biogen's $BIIB Bullish Breakout in late August was thwarted when the share price reached 330. However, price action in the recent couple of weeks is indicative of a bullish continuation.Biogen (BIIB) Daily Chart(click to enlarge)Breakout Confirmation:- First of all, we can see that the bullish breakout was sharp.- Also, as price retreats, we can see long tails when it reached down to the previous resistance pivots. - This shows that the market is turning the previous resistance into support - a bullish sign.- Furthermore, the RSI has held above 40, which reflects maintenance of the bullish momentum. I think even if price comes down to 295, the bullish outlook would still be alive. - A break below 280 however should cause concern.Upside:- The first area to monitor will be around 350, the common support area of a previous consolidation.- Above that ,we might see resistance around 380-390, but the high around 440 will be opened up. - The weekly chart below shows strong bullish price action before 2015. After a 2 and a half year consolidation, it looks ready to regain that bullish momentum. - Again, this bullish outlook looks good until price breaks below 280. BIIB Weekly Chart(click to enlarge)