Most serious traders blow out once or twice as part of the learning process. A model is just one aspect of trading, risk management is the bigger part, and it takes a blow out or two to learn that lesson. Trades will go against you no matter how good the model.
Take this as an opportunity not a failure. You have done very well and I encourage you to keep pushing forward. In the case of oil at this particular time the macro environment and the overwhelming Supply was just too much along with another few weeks of not enough demand. As things normalize out of this phase/cycle your cycle timing tool will be much more powerful. And I am on board with spxu which is in like with the meacro