主题：这个错那里。正确如何?

if CROSS(ma30,ma60) and time>090100 and time<145500 then
begin
sellshort(holding<0,1,thisclose);
buy(holding=0,1,thisclose);
end

if CROSS(ma60,ma30) and time>090100 and time<145500 then
begin
sell(holding>0,1,thisclose);
buyshort(holding=0,1,thisclose);
end

//止赢平仓
SELL((C-ENTERPRICE)>=100 and holding>0,0,MARKET);
SELLSHORT((ENTERPRICE-C)>=100 and holding<0,0,MARKET);