With less than 100 “oil” in hand, go all-in; take a 40% stop-loss—because only going all-in can let you turn things around quickly. If you have more than 100 “oil,” go all-in with 80%; with 200 “oil,” use 50%; with 500 “oil,” use 25%; with 1000 “oil,” go all-in with 10% to 15%. Think it through—if you can’t back it with a heavy position, you won’t be able to flip back to breakeven for ages, a long, long time from now, at best.