Use protective stops. Never trade the spot month. Do NOT add to a losing position. Do NOT spread a loss, because all you are doing is locking in a loss on one leg. Do NOT trade thin markets.
Bears make money.
Pigs get slaughtered. Commodity trading is not suitable for everyone. While there is potential for profit, there is an equal chance for loss. Past performance is not related to future performance. You need to understand your personality before trading.