通达信选股（画线类型的未来函数）

NMA:=EMA(CLOSE,19);
UP:=DRAWLINE(L=LLV(L,BARSLAST(CROSS(NMA,RMA))+1),LLV(L,BARSLAST(CROSS
(NMA,RMA))+1),H=HHV(H,BARSLAST(CROSS(RMA,NMA))+1),HHV(H,BARSLAST(CROSS
(RMA,NMA))+1),0),COLOR0000FF;
DOWN:=DRAWLINE(H=HHV(H,BARSLAST(CROSS(RMA,NMA))+1),HHV(H,BARSLAST(CROSS
(RMA,NMA))+1),L=LLV(L,BARSLAST(CROSS(NMA,RMA))+1),LLV(L,BARSLAST(CROSS
(NMA,RMA))+1),0),COLOR00FF00;
BT:=(LLV(A8,2)=LLV(A8,7) AND COUNT(A8 0,2) AND CROSS(A8,MA(A8,2))) AND
REF(DOWN,1) REF(DOWN,2) AND UP REF(DOWN,1);
XG:BT;