We have seen very volatile expiry. Buyers had shown their confidants well. But the triple pattern break was in a down trend. Now wave 5 and wave 3 have been confirmed. As you are seeing a big correction wave after 5 wave finish. And also a 5 wave down trend pattern in itself can be seen on the chart. 18200 -18230 range is likely to have a retracement. It is the fourth correlation wave to small retracement of the 5 wave downtrend. Anyway lets wait for the next impulse wave which is 5th wave of 4hr time frame, as i said the 3rd impulse also we confirmed yesterday. As per the wave pattern this downtrend is valid whenever nifty holding its price range above 17500. However Nifty is very confident of not going below 17900.