Time will tell if bottom formed at 254 earlier is the long term bottom or not. Presently the stock has support at 275 and resistance at 405. Once 405 is crossed and the stock shows bullishness, further assessment can be done then.
AVANTI looks highly overstretched. Buying at this levels not recommended. A close below 340 on weekly charts can trigger a fall which can be very string and fast.
Wait for 180-220 levels and after that lets take a decision wether to buy or avoid.