Shorting a Crude Oil Spread

For the past, few days the Crude Oil (F20-H20) calendar spread has started to gently roll over into its' seasonally weak period. The spread has profited 13 of the last 15 years when sold on 7/19 and bought on 12/19. The profit to draw down ratio is strong at 161% and the best profit is well over 5x the worst profit during this same 15-year period. On Thursday, we will sell the Crude Oil (F20-H20) calendar spread a little early at or near the current price.