主题：[求助]关于上升量下跌量比例的代码和定义

VARIABLE:UP=0,DOWN=0;
aaa:ref(c,1);
if c>o OR (C=O AND aaa<c) THEN BEGIN
 UP:=vol;
 DOWN:=0;
END
else if c<o or (C=O AND aaa>c) THEN BEGIN
 DOWN:=vol;
 UP:=0;
END

ma_up:sum(up,20)/sum(up>0,20);
ma_DOWN:sum(DOWN,20)/sum(DOWN>0,20);
MA_VOL:ma_up/ma_DOWN;