Please do not average a losing trade. If you keep shorting higher prices what is the stop for your trade. Keep in mind that you are trading futures, margin calls will get triggered and positions will be liquidated by the brokers with huge losses.
Keep sufficient capital as margin in your account. Gold is reaching for higher levels, what was the reason to short here. If you are convinced with your analysis to short, then stick to your rules. But please keep risks at the lowest. Gold is not behaving well into smooth moves, it has caught the high volatility fever.