look at rsi, during the last dip to 40, then look at the macd, 50 crossing under 200
Look at the MACD when INCY dropped from 70 to ~45 last time. Given that it appears as though INCY can fall an awful long way yet. Don't just look at RSI but also MACD.
at current level, it appears to be oversold. Stock reached major support level, good time to enter