通达信壶底买入源码

EXIST(DOWNNDAY(V,4),13) AND EXIST(NDAY(V,REF(V,1),4),7) AND EXIST(DOWNNDAY(C,3),13)
AND EXIST(NDAY(C,REF(C,1),3),7) AND EXIST(LLV(C,20),7);

壶底买入信号(1年）：869/1316 胜率66% 手利770 日利38