It has been a tough year for oil traders. Even the computers haven’t been able to get it right consistently.
Wall Street is closely tracking firms that use trend-following algorithms to trade oil futures, which profited mightily from betting on higher prices as crude climbed to more than $120 per barrel this spring. But with oil falling bumpily since June, the trend-followers have waffled between bullish and bearish wagers and given some of those profits back.