I had to go back all the way to March 20th of this year to find a higher volume day of 3.4 mill and guess the price, $5.42 at the close.....so, like it may have been the time to sell back then (due to immense bio selling Fed chatter), now could be the time to buy hand over fist at an oversold yearly low, especially since the price rebounded so much at the close on huge buy volume. Volume over 3 mill and over 500 thousand near the close(mostly buy up volume).
Do your own DD of course!
Buys at close and after huge - 16:22:40 808,600 @ $2.93 and 16:00:00 632,100 @$2.92