Nifty gaped above PDH . IR formed which was very narrow.. Bias was bullish . I was expecting a drift down to PDH. But an Envelop formed around the IR. . Went long on the TST of Range low. BOF of HOD gave a short signal. Nifty was trading within a 25 point range the whole day..Always pay attention to flip zones. Notice how the Flip Zone acted as support today.