虽然取名三线开花，其实图中有四条线，一、二、三号操作线再加上一条星号线也就是趋势线。当三条操作线由下向上金叉时就会出现钱袋子，也就是买进点位。
图形简洁直观，操作方便，信号出现（钱袋子买进）可视为介入信号，当然不能一概而论，下跌趋势中出现的信号多数为无效信号，有的只能参与一下反弹，所以不建议参与下跌趋势中的个股，还是老方法，建议选择趋势线向上有一定角度的个股，角度以不小于15度为基准，最好45度角向上的个股，这样的买点信号是相当准确的。
以下是指标源代码和指标公式文件下载链接地址，敬请留意。
指标源代码：
{三线开花}{副图公式}
一号线:(SUM(EMA((CLOSE+LOW)/2,1)/3,3)),COLOR00FFFF,LINETHICK1;
二号线:EMA(一号线,3),COLORFF00FF,LINETHICK1;
三号线:EMA(二号线,3),COLOR00FF00,LINETHICK1;
MMM:=MA(CLOSE,20);
DRAWTEXT((CLOSE<MMM),MMM,'*'),COLOR00FF00,LINETHICK5;
DRAWTEXT((CLOSE>MMM),MMM,'*'),COLOR0000FF,LINETHICK5;
VAR1:=CLOSE>REF(CLOSE,1) AND CLOSE>REF(CLOSE,2);
VAR2:=REF(VAR1,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR3:=REF(VAR2,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR4:=REF(VAR3,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR5:=REF(VAR4,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR6:=REF(VAR5,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR7:=REF(VAR6,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR8:=REF(VAR7,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR9:=REF(VAR8,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VARA:=REF(VAR9,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VARB:=REF(VARA,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VARC:=REF(VARB,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VARD:=CLOSE<REF(CLOSE,1) AND CLOSE<REF(CLOSE,2);
VARE:=REF(VARD,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VARF:=REF(VARE,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR10:=REF(VARF,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR11:=REF(VAR10,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR12:=REF(VAR11,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR13:=REF(VAR12,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR14:=REF(VAR13,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR15:=REF(VAR14,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR16:=REF(VAR15,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR17:=REF(VAR16,1) AND CLOSE<=REF(CLOSE,1) AND CLOSE>=REF(CLOSE,2);
VAR18:=REF(VAR17,1) AND CLOSE>=REF(CLOSE,1) AND CLOSE<=REF(CLOSE,2);
VAR19:=REF(VARD OR VARE OR VARF OR VAR10 OR VAR11 OR VAR12 OR VAR13 OR
VAR14 OR VAR15 OR VAR16 OR VAR17 OR VAR18,1) AND VAR1;
DRAWTEXT(FILTER(VAR19=1,5),LOW,'买进'),COLORFF00FF;
DRAWICON(FILTER(VAR19=1,5),LOW,9);