指标通过计算股价在特定周期内的相对位置来判断趋势强度。指标线在底部区域与价格形成底背离时产生买入信号，在顶部区域配合成交量特征时产生卖出信号。当指标线从低位上穿中轴线并确认转势时，可作为选股依据。
操作策略是当指标线处于底部区域且出现特定K线形态时关注买入机会，指标线上穿底部线时确认买入；当指标线进入顶部区域并出现放量滞涨时考虑卖出。选股条件要求指标线从低位持续上穿中轴，确认趋势转强。
顶:88,COLOR00FF00;
底:12,COLOR0000FF;
中:50,POINTDOT,COLORFFFFFF;
DRAWTEXT(ISLASTBAR,顶,'顶'),COLOR00FF00;
DRAWTEXT(ISLASTBAR,底,'底'),COLOR0000FF;
DRAWTEXT(ISLASTBAR,中,'中'),COLORFFFFFF;
HG1:=44;
HG2:=3*SMA((C-LLV(L,HG1))/(HHV(H,HG1)-LLV(L,HG1))*100,5,1)-2*SMA(SMA((C-LLV(L,HG1))/(HHV(H,HG1)-LLV(L,HG1))*100,5,1),3,1);
趋势线:EMA(HG2,3),LINETHICK2,COLORLIMAGENTA;
STICKLINE(趋势线< 底,趋势线,底,2,0),COLOR00FFFF;
DRAWTEXT(CROSS(底,趋势线),底+5,'趋势底'),COLOR00FFFF;
STICKLINE(趋势线>顶,趋势线,顶,2,0),COLORFFFFFF;
DRAWTEXT (CROSS(趋势线,顶),顶-5,'趋势顶'),COLORFFFFFF;
HG3:=趋势线< 底 AND C>MAX(REF(C,1),REF(O,1)) AND REF(C,1)< REF(C,2) AND V>REF(V,1);
HG4:=FILTER(HG3,10);
HG5:=BARSLAST(CROSS(底,趋势线));
HG6:=CROSS(趋势线,底) AND COUNT(HG3,HG5)=0;
HG7:=HG4 OR HG6;
STICKLINE(HG7,底,50,1,0),COLOR0000FF;
DRAWTEXT(HG7,52,'★买入'),COLOR0000FF;
HG8:=趋势线>顶 AND REF(C,1)< REF(O,1) AND REF(V,1)>REF(V,2) AND (C< O OR V< REF(V,1));
HG9:=FILTER(HG8,10);
HG10:=BARSLAST(CROSS(趋势线,顶));
HG11:=CROSS(顶,趋势线) AND COUNT(HG8,HG10)=0;
HG12:=HG9 OR HG11;
STICKLINE(HG12,顶,50,1,0),COLOR00FF00;
DRAWTEXT(HG12,48,'★卖出'),COLOR00FF00;
选股:CROSS(趋势线,50) AND REF(趋势线,1)< 50 AND REF(趋势线,2)< 50 AND REF(趋势线,3)< 50 AND REF(趋势线,4)< 50 AND REF(趋势线,5)< 50;
