W底也叫双重底。一波下跌后反弹不过前高然后再来一波打压，然后再次启动。形成W形态的双重底。要求第二波下跌要比第一波下跌跌幅小且第二波下跌最低点要高于第一波下跌最低点，第二波反弹量要大于第一波反弹量。当下行情很多都是构造双重底形态。这个指标就是寻找形成双底后放量启动的个股。双重底启动时是一个买点，因为庄家手法不同，有的要形成三重底或者多重底，所以，吃完第一波启动后第二波就是突破双重底前高也是一个买点
K:=CURRBARSCOUNT,NODRAW;
LH:DRAWLINE(L=LLV(L,周期),L,H=HHV(H,周期),H,0),COLORLIRED;
HL:DRAWLINE(H=HHV(H,周期),H,L=LLV(L,周期),L,0),COLORLIBLUE;
LT:BARSLAST(L=HL),NODRAW; LL:REF(L,LT),NODRAW;
LT1:REF(LT,LT+1),NODRAW; LL1:REF(L,LT+LT1+1),NODRAW;
HT:BARSLAST(H=HL),NODRAW; HH:REF(H,HT),NODRAW;
HT1:REF(HT,HT+1),NODRAW; HH1:REF(H,HT+HT1+1),NODRAW;
VV:SUM(V,LT),NODRAW; VV1:REF(VV,HT),NODRAW;
ZF:(HH/LL-1)*100,NODRAW; DF:(LL/HH-1)*100,NODRAW;
DRAWTEXT(HT=0,H*1.02,VARCAT(VAR2STR(ZF,1),'%')),COLORLIRED;
DRAWTEXT(LT=0,L*0.98,VARCAT(VAR2STR(DF,1),'%')),COLORLIBLUE;
TJ1:LL LL1,NODRAW;
TJ2:HH/LL1 1.15,NODRAW;
TJ3:CROSS(C,HH) AND (VV VV1 OR V REF(HHV(V,LT),HT)),NODRAW;
TJ4:HL=DRAWNULL AND HT =20,NODRAW;
XG:TJ1 AND TJ2 AND TJ3 AND TJ4,NODRAW;
DRAWICON(XG,L*0.98,1);
STICKLINE(XG,O,C,6,0),COLORYELLOW;
XGT:BARSLAST(XG=1),NODRAW;
XGL:IF(BETWEEN(XGT,1,15),DRAWLINE(XGT=0,C,XGT =15,REF(REF(C,XGT),1),0),DRAWNULL),DOTLINE,COLORYELLOW;
