Bullish Signals

A trader bought 10,000 ATML Jan 8 Calls for $0.20 (49.8 times usual volume) with stock at $7.62
A trader bought 5,000 GREK Feb 23 Calls for $0.55 (19.8 times usual volume) with stock at $21.68
A trader bought 3,000 MIC Feb 55 Calls for $1.20 (72.7 times usual volume) with stock at $53.29
A trader bought 2,000 CLDX Jan 25 Calls for $0.90 (3.3 times usual volume) with stock at $23.97