Just traded PRVB today, good catalyst of news about a breakthrough drug. It had good room to move either way based on the previous day candle high 22.85 and low 9.82. Premarket was bearish, i waited for a pullback after the market open and i jumped in at 14.50, took half of my position off at 13.50 and last half at 12.50. Nice easy trade. Note that my trading time frame is the 5 min chart and my faster timeframe is the 1 min chart. I use the daily chart for getting my pivots, trendlines and moving averages.