As can be seen from the adjacent chart, MCX mentha oil was trading in a medium-term downward sloping channel. Recently it has crossed the upper end of the channel and has retested it. Along with the channel line the key daily moving averages are there to provide support to the agri-commodity. At these supports the oil formed a bullish outside bar in the last session. Thus the commodity looks set to move higher. The key levels on the upside will be Rs740 and Rs.746. On the other hand, the swing’s low of Rs.691 will act as a key support on a closing basis.