Many speculators trade only one commodity. Getting out of a rallying commodity too quickly, or holding losers too long results in losses. Trading against the trend is a common mistake. This may result from overtrading, too many day trades, and under-capitalization, accentuated by failure to use a money management approach to trading futures. Futures traders tend to do inadequate research.
Most traders overtrade without doing enough research.
They take too many positions with too little information. They take small profits, not riding gains as they should, and tend to stay with losing positions. Too many traders do not apply money management techniques. They have no discipline, no plan. Many also overstay when the market goes against them, and won't limit their losses.