No active signal at the moment, just an idea I'll be tracking.
Enter SHORT on spike DOWN in Wheat Vol Index of at least 7 points (highlighted with red boxes).
Exit on clean crossover of SMI and its red signal line.
Green boxes show upward (losing) extent of move during holding period. Red the downward (winning) extent.
5 trades since Wheat Vol Index was started. Cumulative profit of -3.96+7.12+2.1+0.72+1.62=7.60% unleveraged
3-4% seems enough space for a SL to be effective but not so large that the risk reward is unattractive.