编写条件：
源码为： K1:100*(C-LLV(L,5))/(HHV(C,5)-LLV(L,5)),LINETHICK2,COLOR00FFFF; K2:100*(C-LLV(L,10))/(HHV(C,10)-LLV(L,10)),COLOR008000; K3:100*(C-LLV(L,20))/(HHV(C,20)-LLV(L,20)),COLORFF8000; K4:100*(C-LLV(L,30))/(HHV(C,30)-LLV(L,30)),LINETHICK2,COLORRED; 弱市线:20,COLORGREEN; 变盘线:50,COLORMAGENTA; 强市线:80,COLORWHITE; 麻烦老师帮忙做一个K4盘中突破50的预警，先谢谢了。（编写方法：
K4:=100*(C-LLV(L,30))/(HHV(C,30)-LLV(L,30));
XG:crOSS(K4,50);
