比如我用四周跑，螺纹我设置市值30万，每次开仓10手为例，系统默认的代码是多头开仓10手，空头却只开仓1手，所有品种都是这样 多头市值对的，空头不管市值多少都只开仓一手，我想把他改为空头也能按市值开仓，需要在哪里做修改，以下是代码：

Params

Numeric money(100);  //开仓市值：单位万元

Numeric length(20);  //四周的周期

Numeric hcrate(15); //价格回撤%

Vars

Series<bool> pickCond; //是否满足选股表达式

Series<Numeric> highline;

Series<Numeric> lowline;

Series<Numeric> buylasthigh(0,2); //买持仓价格峰值

Series<Numeric> selllastlow(0,2); //卖持仓价格低谷

Events

OnBar(ArrayRef<Integer> indexs)

{

Integer i = 0;

range[i = 0:datacount-1]

{

//使用IsAllPickCondition()判断当前Bar是否满足选股表达式，

pickCond = IsAllPickCondition();

Numeric TempUnitMoney=Open/rollover*ContractUnit*BigPointValue;

numeric lots=Round(10000*money/TempUnitMoney/baseshares,0)*baseshares;

highline=Highest(High[1],length);

lowline=Lowest(Low[1],length);

if(MarketPosition==1 and Low<=buylasthigh*(1-0.01*hcrate) and buylasthigh>EntryPrice*(1+0.01*6))

{Sell(0,Min(Open,buylasthigh*(1-0.01*hcrate)));Return;}

if(MarketPosition==-1 and High>=selllastlow*(1+0.01*hcrate) and selllastlow<EntryPrice*(1-0.01*6))

{BuyToCover(0,Max(Open,selllastlow*(1+0.01*hcrate)));Return;}

If(MarketPosition<>1 And High>=highline and pickCond[1])   //在开仓的时候确认下是否被选中

Buy(lots,Max(Open,highline));

If(MarketPosition<>-1 And Low<=lowline)

SellShort(0,Min(Open,lowline));

If(MarketPosition==1)

{

If(BarsSinceEntry==0)

buylasthigh=EntryPrice;

Else

buylasthigh=Max(High,buylasthigh);

}

If(MarketPosition==-1)

{

If(BarsSinceEntry==0)

selllastlow=EntryPrice;

Else

selllastlow=Min(Low,selllastlow);

}

}

}