子母线同花顺副图指标，
吃.吐为快线,母子带为趋势.
源码分享
V1:=(C*2+H+L)/4*10;V2:=EMA(V1,13)-EMA(V1,34);V3:=EMA(V2,2);V4:2*(V2-V3)*5.5;吃: IF(V4>=0,V4,0),COLOR7F00FF,LINETHICK3;吐: IF(V4<=0,V4,0),COLOR66FFF0,LINETHICK2;母:MA(V3,1);子:REF(母,3);DRAWBAND(子,RGB(0,255,0),母,RGB(255,0,0));
