主题：信号过滤

cond1:(CROSS(波段,0) AND 金波段>0) OR (CROSS(金波段,0) AND 波段>0);
cond2:(CROSS(0,波段) AND 金波段<0) OR (CROSS(0,金波段) AND 波段<0);

if cond1 then
begin
mark:=if(mark=1 or mark=0,-1,1);        
DRAWTEXT(mark=-1 ,LOW,'▲',COLORRED,0);
end

if cond2  then
begin
mark:=if(mark=-1 or mark=0,1,-1);        
DRAWTEXT(mark=1,HIGH,'▼',COLORGREEN,0);
end