主题：这个程序出来的都是买入信号，给我解正一下这个程序，

MA5:=MA(CLOSE,5);
MA10:=MA(CLOSE,10);
MA20:=MA(CLOSE,20);
kpj:=OPEN;
spj:=close;
buyk:=0;
sellk:=0;
<%
vkpj=ffl.VarData("kpj")
vspj=ffl.VarData("SPJ")
vma5=ffl.VarData("MA5")
vma10=ffl.VarData("MA10")
vma20=ffl.VarData("MA20")
last=UBOUND(vspj)
last5=UBOUND(vma5)
lastbuyprice=0
lastsellprice=0
mybuy=0
mysell=0
closelj=0
for i=0 to last
if lastbuyprice=0 AND vspj(last)>vma5(last5) then
mybuy=1
else
mysell=1
end if
next 
ffl.VarData("buyk")=mybuy
ffl.VarData("sellk")=mysell
%>
ENTERLONG:buyk;
ENTERSHORT:sellk;