Nifty post negative opening and initially testing its support zone of 18367 rebounded but only to face resistance at higher levels of 18450-18500 & fell sharply towards 18250. Now what should be the next course of action? Technically the Index looks for a further correction but 18230-18267 is a very vital support zone & a bounce back from this level is eminent. But if the Index sustains below 18250 then it can shed till 18210-18180.