Adjacent chart shows the price movement of NCDEX soya oil continuous contract. Structurally, the oil formed a multi month triangle, which broke out on the upside. Since then the oil rallied nicely. However the up move looks complete at Rs 682.70. From there the agri-commodity has entered short-term correction mode. The daily momentum indicator is showing negative divergence and has given a fresh sell signal. Thus soya oil can come down to test the daily lower Bollinger Band, ie Rs 635.