标题：加减仓的模型评测错误

代码例子：

ma5:=ma(c,5);

ma10:=ma(c,10);

ma20:=ma(c,20);

b1:=cross(ma5,ma20);

b2:=cross(ma10,ma20);

s1:=cross(ma20,ma5);

s2:=cross(ma20,ma10);

平均持仓成本:avgenterprice;//这个函数的结果错误

if holding>0 and s1 then sell(1,1,thisclose);

if holding<0 and b1 then sellshort(1,1,thisclose);

if holding>0 and cross(ma10,ma5) then sell(1,1,thisclose);

if holding<0 and cross(ma5,ma10) then sellshort(1,1,thisclose);

if holding=0 and b1 then buy(1,1,thisclose);

if holding=1 and b2 then buy(1,1,thisclose);

if holding=0 and s1 then buyshort(1,1,thisclose);

if holding=-1 and s2 then buyshort(1,1,thisclose);

测试报告的明细表（手续费为0）