顶底警示，好用。。。。。。。。。。。。。。。。。
LL:=EMA (100*(C-LLV(LOW,34))/(HHV(H,34)-LLV(LOW,34)),3);
DRAWBAND(LL,RGB(50,250,11),10,RGB(255,0,0));
DRAWBAND(90,0,10,0);
警示线:EMA (100*(C-LLV(LOW,34))/(HHV(H,34)-LLV(LOW,34)),3),colormagenta;
预警:90,POINTDOT;
安全区:10,POINTDOT;
