标题：代码只开多不开空的问题

INPUT:n1(5,1,100,10),n2(10,1,120,12),n3(20,1,120,12),n4(60,1,200,20);
ma1:ma(c,n1);
ma2:ma(c,n2);
ma3:ma(c,n3);
ma4:ma(c,n4);

long:CROSS(MA1,MA2);

IF LONG THEN
BEGIN
SELLSHORT(HOLDING<0,HOLDING,MARKET);
BUY(LONG,1,MARKET);
END

short:cross(MA2,MA1);

IF SHORT THEN
BEGIN
SELL(HOLDING>O,HOLDING,MARKET);
BUYSHORT(SHORT,1,MARKET);
END

 

 

此主题相关图片如下：微信图片1.png
       

麻烦帮我检查下哪里出错，谢谢

为什么只显示开多，没有开空？哪里编辑出错了？

 BEGIN
SELL(HOLDING>O,HOLDING,MARKET);
BUYSHORT(SHORT,1,MARKET);