指标的核心功能是识别股价经历一轮明显下跌后，出现“筑底反转”的信号。它主要找的是这样一种形态：股价先是连续走弱，形成阶段性低点，然后跌势放缓，波动收窄，最后出现一根强势的阳线，不仅突破了短期的下降压力，收盘价还高于几天前的最高点，并且站上了中期均线，这通常被看作是空头力量衰竭、多头开始反攻。
操作策略：这个信号更适用于寻找波段底部后的右侧交易机会。当信号出现时，可以先观察，但不能冲动。理想的策略是等信号次日看股价能否继续走强来确认。可以考虑在信号K线收盘附近或次日回调不破均线时低吸，并把止损设在近期前期最低点下方。上涨过程中，如果涨幅较大后出现放量但滞涨的情况，可以考虑分批止盈。
HGS1:=HIGH< REF(HIGH,1) AND L< REF(L,1);
HGS2:=HIGH< REF(HIGH,1) AND L>REF(L,1);
HGS3:=HIGH>REF(HIGH,1) AND L< REF(L,1);
HGS4:=HIGH>REF(HIGH,1) AND L>REF(L,1);
HGS5:=REF(HIGH,2) < H AND REF(L,2)< LOW AND REF(H,2)>REF(H,1) AND REF(L,2)< REF(L,1);
HGS6:=COUNT(HGS1,6)>=3 AND COUNT(HGS2 OR HGS3,5)=0 AND LLVBARS(LOW,6) = 1 AND HHVBARS(H,6)>=5 AND HGS4;
HGS7:=COUNT(HGS1,7)>=3 AND COUNT(HGS2 OR HGS3,6)=1 AND LLVBARS(LOW,7) = 2 AND HHVBARS(H,7)>=6 AND HGS5;
HGS8:=COUNT(HGS1,7)>=3 AND COUNT(HGS2 OR HGS3,6)=1 AND LLVBARS(L,7) = 1 AND HHVBARS(H,7)>=6 AND HGS4;
HGS9:=COUNT(HGS1,8)>=3 AND COUNT(HGS2 OR HGS3,7)<=2 AND LLVBARS(L,8) = 2 AND HHVBARS(H,8)>=7 AND HGS5;
HGS10:=COUNT(HGS1,8)>=3 AND COUNT(HGS2 OR HGS3,7)<=2 AND LLVBARS(LOW,8) = 1 AND HHVBARS(H,8)>=7 AND HGS4;
HGS11:=COUNT(HGS1,9)>=3 AND COUNT(HGS2 OR HGS3,8)<=3 AND LLVBARS(L,9) = 2 AND HHVBARS(H,9)>=8 AND HGS5;
HGS12:=COUNT(HGS1,9)>=3 AND COUNT(HGS2 OR HGS3,8)<=3 AND LLVBARS(LOW,9) = 1 AND HHVBARS(H,9)>=8 AND HGS4;
HGS13:=COUNT(HGS1,10)>=3 AND COUNT(HGS2 OR HGS3,9)<=4 AND LLVBARS(LOW,10) = 2 AND HHVBARS(H,10)>=9 AND HGS5;
HGS14:=COUNT(HGS1,10)>=3 AND COUNT(HGS2 OR HGS3,9)<=4 AND LLVBARS(LOW,10) = 1 AND HHVBARS(H,10)>=9 AND HGS4;
HGS15:=COUNT(HGS1,11)>=3 AND COUNT(HGS2 OR HGS3,10)<=5 AND LLVBARS(LOW,11) = 2 AND HHVBARS(H,11)>=10 AND HGS5;
HGS16:=HGS6 OR HGS7 OR HGS8 OR HGS9 OR HGS10 OR HGS11 OR HGS12 OR HGS13 OR HGS14 OR HGS15;
HGS17:=REF(L,1)< REF(L,2) AND REF(LOW,1)< L AND REF(HIGH,1)< REF(HIGH,2) AND REF(HIGH,1)< HIGH AND C>REF(HIGH,2) AND C>OPEN;
HGS18:=CROSS(C,MA(C,18));
筑底捕捉反转:HGS16 AND HGS17 AND HGS18,LINETHICK2,COLOR00FFFF;
