平空时却没有开多信号。　[金字塔]

请教：以下是个很简单的1分钟股指期货程序，设计是按收盘价出信号：开多同时平空，或平多同时开空。

 不知为何“平多开空” 信号同时出现是对的，但平空时却没有开多信号？

BUYCOND:=HOLDING=0 and C>ref(HHV(H,1),1);
SELLCOND:= C<ref(LLV(L,1),1) AND HOLDING>0;
BUY(BUYCOND,1,THISCLOSE);
SELL(SELLCOND,1,THISCLOSE);

SHORTCOND:=HOLDING=0 and C<ref(LLV(L,1),1);
COVERCOND:= C>ref(HHV(H,1),1)AND HOLDING<0;
BUYSHORT(SHORTCOND,1,THISCLOSE);
SELLSHORT(COVERCOND,1,THISCLOSE);

BUYCOND:=HOLDING=0 and C>ref(HHV(H,1),1);
SELLCOND:= C<ref(LLV(L,1),1) AND HOLDING>0;

SHORTCOND:=HOLDING=0 and C<ref(LLV(L,1),1);
COVERCOND:= C>ref(HHV(H,1),1)AND HOLDING<0;
SELLSHORT(COVERCOND,1,THISCLOSE);
BUY(BUYCOND,1,THISCLOSE);
SELL(SELLCOND,1,THISCLOSE);

BUYSHORT(SHORTCOND,1,THISCLOSE);

金字塔固定顺序平空开多平多开空

不要随意发挥改写顺序

BUYCOND:= C>ref(HHV(H,1),1);
SELLCOND:= C<ref(LLV(L,1),1) ;

if buycond then begin
SELLSHORT(holding<0,1,THISCLOSE);
BUY(holding=0,1,THISCLOSE);
end

if sellcond then begin
SELL(holding>0,1,THISCLOSE);
BUYSHORT(holding=0,1,THISCLOSE);
end