A large move is imminent for Wheat, according to James Dima, technical analyst at Marex Spectron.
Looking at a chart of March 2018 Wheat (H18), Dima notes how the Average True Range (ATR) is extremely low (below 6.5, based on ATR setting of 10 days). He says that as the ATR shrinks to historically low levels it signifies that a large move is pending. A similar signal occurred on 19 May this year, a couple of weeks prior to the beginning of the summer rally (see Chart).
Dima says one way to trade such an expectation would be to buy an at the money straddle, in order to take advantage of an anticipated rise in delta.