简单分笔
a:=BUYVOL*c/100;
bz:=sum(a,0);
b:=c*SELLVOL/100;
sz:=sum(b,0);
z:=bz+sz;
cz:=bz-sz;
xb5:=if(a<=20,a,0);散户买:sum(xb5,0),LINETHICK2,COLORred;
xs5:=if(b<=20,b,0);散户卖:sum(xs5,0),LINETHICK2,COLORgreen;