以下是通达信中线趋势公式（无源码的请下载附件导入）

中线趋势

20均线，38均线为依托。在牛市红色K线跟庄到顶，其他市注意向上箭头。
小框
N1 (1,100,20);
N2 (1,100,38);
大框
Y1:=(MA(CLOSE,2)+MA(CLOSE,3)+MA(CLOSE,4)+MA(CLOSE,5))/4;
Y2:=EMA(Y1,5);
Y3:=EMA(Y2,3);
YY:EMA(Y3,N1),COLORRED;
Z1:=(MA(CLOSE,9)+MA(CLOSE,6)+MA(CLOSE,7)+MA(CLOSE,8))/4;
Z2:=EMA(Z1,5);
Z3:=EMA(Z2,3);
ZZ:EMA(Z3,N2),COLORGREEN;
DRAWTEXT( CROSS( YY,ZZ ), ZZ, '▲');
DRAWTEXT( CROSS( ZZ,YY ),YY , '▽');
STICKLINE((YY-ZZ)>0.00001,OPEN,CLOSE,1,1),COLORRED, ;
STICKLINE((YY-ZZ)<-0.00001,OPEN,CLOSE,1,1),COLORCYAN, ;