老师，使用的是onbar ,交易信号出现后，第二根bar开盘价交易

//------------------------------------------------------------------------

// 简称: opentrade

// 名称:

// 类别: 公式应用

// 类型: 用户应用

// 输出: Void

//------------------------------------------------------------------------

Params

//此处添加参数

Numeric n(10020);

Vars

//此处添加变量

series<Numeric> barslastcrossup;

Bool crossup;

series<Numeric> barslastcrossbelow;

   Bool crossbelow;

Events

OnBar(ArrayRef<Integer> indexs)

{

crossup = (c>n and c[1]<=n and marketposition<>1);

barslastcrossup = nthcon(crossup,1);

if(barslastcrossup == 1 and marketposition<>1)

 {

  buy(1,open);

 }

crossbelow = (c<n and c[1]>=n and marketposition<>-1);

barslastcrossbelow = nthcon(crossbelow,1);

if(barslastcrossbelow == 1 and marketposition<>-1)

 {

  Sell(1,open);

 }

PlotAuto(line,n,n,Yellow,Enum_Line,enum_solid,Enum_3Pix);

Commentary(contracts=+text(currentcontracts));

PlotAuto(contracts,text(CurrentContracts),H*1.003,white);

if(c<n and c[1]>=n)

 {

PlotAuto(下穿,下穿,L*1.005);

 }

 if(c>n and c[1]<=n)

{

PlotAuto(上穿,上穿,L*0.995);

}

}