下跌趋势里，突然冒出一根量大、实体超粗的阴线，能盖过之前一段时间的 K 线和成交量（这里 “覆盖” 是超过不是包围）。这大概率是主力动作，跌了这么久，主力低位出逃的可能性小，更可能是建仓，图例
ST:=100*ABS(C-O)/REF(C,1);
T1A:=C<O AND V=HHV(V,7) AND ST>1 AND L=LLV(L,10);
T1:=T1A AND FILTERX(T1A,3);
N1:=BARSLAST(T1);
T2:=EVERY(C<REF(O,N1),N1);
XG:=REF(T2 AND N1>2,1) AND CROSS(C,REF(O,N1)) AND C>=O;
STICKLINE(T1,C,O,0.5,-1)COLORBLUE;
STICKLINE(T2,REF(O,N1),REF(O,N1),1,1)COLORYELLOW;
DRAWICON(XG,L,1);
