我们假定股市行情的变化是有一定规律的，在股市规律之中，最重要的莫过于个股趋势。个股趋势可以分为上升趋势、下降趋势和横盘趋势。其中上升趋势是有价值的，股市60%—80%的利润由此产生。
在没有电脑的时代，投资者用一把尺子画股票的趋势线。后来，有了电脑，可以在股票软件上调出画线工具，用鼠标画趋势线了。现在，一把尺子指标做到了自动画线，把近期几个高点用直线连接起来，叫做高辅线，近期几个低点用直线连接起来，叫做低辅线。一把尺子指标不但节省了画线的时间，而且让传统方法推陈出新，发扬光大。
MA1:MA(CLOSE,5);
MA2:MA(CLOSE,10);
MA3:MA(CLOSE,20);
SAT:=(AMOUNT/C)/(HHV(AMOUNT,20)/HHV(C,20));
量能饱和:=IF(SAT>1,1,SAT)*100,NODRAW;
获利筹码:=WINNER(C)*100,NODRAW;
N:=5;
LC:=REF(CLOSE,1);
RSI值:=SMA(MAX(CLOSE-LC,0),6,1)/SMA(ABS(CLOSE-LC),6,1)*100;
WR10:=(HHV(HIGH,3)-CLOSE)/(HHV(HIGH,3)-LLV(LOW,3))*100;
活跃:=(RSI值-WR10);
活跃度比:=IF(活跃>=0,(活跃+100)/2,100-ABS((活跃-100)/2)),NODRAW;
A1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,1)+1);
A2:=A1>REF(A1,1);
B1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,2)+1);
B2:=B1>REF(B1,1);
C1:=BACKSET(ISLASTBAR,PEAKBARS(1,N,3)+1);
C2:=C1>REF(C1,1);
A11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,1)+1);
A21:=A11>REF(A11,1);
B11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,2)+1);
B21:=B11>REF(B11,1);
C11:=BACKSET(ISLASTBAR,TROUGHBARS(2,N,3)+1);
C21:=C11>REF(C11,1);
高辅线:DRAWLINE(B2,H,A2,H,1),COLORBLUE;
低辅线:DRAWLINE(B21,L,A21,L,1),COLOR0000FF;
DRAWRECTREL(80,10,240,60,RGB(0,75,200));
DRAWRECTREL(80,10,160,60,RGB(0,100,0));
DRAWRECTREL(80,10,80+CONST(活跃度比*160/100),60,RGB(200,0,50));
DRAWTEXT_FIX(1,0.00,0.01,0,STRCAT(STRCAT('活跃度: ',CON2STR(活跃度比,2)),'％ ')),COLORYELLOW;
DRAWRECTREL(80,70,240,120,RGB(0,75,200));
DRAWRECTREL(80,70,160,120,RGB(0,100,0));
DRAWRECTREL(80,70,80+CONST(获利筹码*160/100),120,RGB(200,0,50));
DRAWTEXT_FIX(1,0.00,0.07,0,STRCAT(STRCAT('获利率: ',CON2STR(获利筹码,2)),'％ ')),COLORYELLOW;
DRAWRECTREL(80,130,240,180,RGB(0,75,200));
DRAWRECTREL(80,130,160,180,RGB(0,100,0));
DRAWRECTREL(80,130,80+CONST(量能饱和*160/100),180,RGB(200,0,50));
DRAWTEXT_FIX(1,0.00,0.13,0,STRCAT(STRCAT('饱和度: ',CON2STR(量能饱和,2)),'％ ')),COLORYELLOW;
