如何把通達信的條件選股公式修改成主圖指標呀？謝謝

FL:=MA(CLOSE,17)+ABS(MA(CLOSE,17)-REF(MA(CLOSE,17),1));

FS:=MA(CLOSE,17)+MA(CLOSE,17)-REF(MA(CLOSE,17),1);

BB:=IF(MA(CLOSE,17)<FS,FS,MA(CLOSE,17));

NX:=EMA(C,250);

A:=BB-(EMA(C,3)-BB);

DIFF:=EMA((NX-(EMA(C,3)-NX)),5);

CROSS(BB,DIFF);