请问为什么不能平仓?为什么委托单索引为0

Params //此处添加参数 Vars //此处添加变量 global numeric long_num(0); global numeric short_num(0); Events OnBar(ArrayRef<Integer> indexs) { //多头 if(h-o>2 and a_buyposition == 0 and long_num==0 and BarStatus==2) { A_SendOrder(enum_buy,enum_entry,1,Q_AskPrice+10*minmove*pricescale,0); long_num=1; } if(BarsSinceEntry!=0 and a_buyposition == 1) { A_SendOrder(enum_sell,enum_exit,1,q_bidprice-10*minmove*pricescale,0); long_num=0; } //空头 if(o-l>2 and a_sellposition == 0 and short_num==0 and BarStatus==2) { A_SendOrder(enum_sell,enum_entry,1,Q_bidPrice-10*minmove*pricescale,0); short_num=1; } if(BarsSinceEntry!=0 and a_sellposition == 1) { A_SendOrder(enum_buy,enum_exit,1,q_askprice+10*minmove*pricescale,0); short_num=0; } }