老师您好，我想控制帐户总体的风险，利用a函数没有读到帐户的总权益、总保证金及可用资金，是哪里写出了问题？

这段代码里有a函数读取资金情况的同时是用图表系统进行交易，这样是否可行，如果不可行应该怎么改进？

Params

Numeric FastLength(5);// 短期指数平均线参数

Numeric SlowLength(20);// 长期指数平均线参数

Numeric probability(30);// 概率

Numeric loss_ratio(3);// 损益比

Numeric exposure(0.05);// 风险敞口

Numeric Margin_Rate(0.15);// 保证金率

Numeric Override(10);// 倍率

Numeric average_loss(2000);// 平均亏损

Numeric i(1);//

Vars

Series<Numeric> AvgValue1;

Series<Numeric> AvgValue2;

Series<Numeric> TotalEquity;

Series<Numeric> Margin;//当前品种保证金

Series<Numeric> lots;

Series<Numeric> lot1;

Series<Numeric> lot2;

Series<Numeric> lot3;

Series<Numeric> lot4;

Events

OnBar(ArrayRef<Integer> indexs)

{

AvgValue1 = AverageFC(Close,FastLength);

AvgValue2 = AverageFC(Close,SlowLength);

PlotNumeric(\"MA1\",AvgValue1);

PlotNumeric(\"MA2\",AvgValue2);

Margin=c*override*margin_rate;

lot1=IntPart((A_FreeMargin(i)-A_CurrentEquity(i)/2)/Margin);//风险度小于0.5

lot3=IntPart(A_CurrentEquity(i)*exposure/average_loss);//风险小于0.05

lots=min(lot1,lot3);

Commentary(\"总权益：\" + Text(A_CurrentEquity(i)));

Commentary(\"可用资金:\" + Text(A_FreeMargin(i)));

Commentary(\"总保证金\" + Text(A_TotalMargin(i)));

Commentary(\"头寸1：\" + Text(lot1));

Commentary(\"头寸3\" + Text(lot3));

Commentary(\"保证金\" + Text(Margin));

If(MarketPosition <>1 && AvgValue1[1] > AvgValue2[1])

{

//Buy(lots,Open);

}

If(MarketPosition <>-1 && AvgValue1[1] < AvgValue2[1])

{

//SellShort(lots,Open);

}

}