通达信三全项+选股指标（MACD类）指标公式

买卖信号

1. **低位金叉**：DIFF上穿DEA，且DIFF<-0.1，显示"低位金叉"文字 2. **二次金叉**：DIFF上穿DEA且DEA<0，且是21周期内第2次金叉，显示"二次金叉"图标和文字 3. **底背离**：股价创新低但DIFF未创新低，随后DIFF上穿DEA，显示"底背离"文字和红色斜线 4. **顶背离**：股价创新高但DIFF未创新高，随后DEA上穿DIFF，绘制绿色斜线 5. **三全项**：低位金叉、二次金叉、底背离三个信号同时满足时显示"三全项"

用法

1. **适用场景**：适用于判断趋势转折点，特别是MACD金叉/死叉信号的有效性验证 2. **信号优先级**：二次金叉比普通金叉更可靠，底背离是较强的反转信号 3. **组合信号**："三全项"是较强买入信号，需同时满足低位金叉、二次金叉、底背离三个条件 4. **注意事项**：顶背离通常预示下跌风险，应考虑减仓或卖出；单一信号可能存在假信号，建议结合其他指标综合判断 5. **操作建议**：低位金叉和二次金叉可作为买入参考，底背离是左侧抄底信号，三全项是较为可靠的买入时机

公式源码

DIFF:EMA(CLOSE,12)-EMA(CLOSE,27);
DEA:EMA(DIFF,9);
macd:2*(DIFF-DEA), COLORSTICK,LINETHICK2;
低位金叉:=crOSS(DIFF,DEA) AND DIFF<-0.1;
STICKLINE(低位金叉,0,0.08,6,0),COLORYELLOW;
DRAWTEXT(低位金叉,0.16,' 低位金叉'),COLORWHITE;
JCCOUNT:=COUNT(CROSS(DIFF,DEA),BARSLAST(DEA>=0));
二次金叉:=CROSS(DIFF,DEA) AND DEA<0 AND COUNT(JCCOUNT=2,21)=1;
STICKLINE(二次金叉,0,0.06,6,0),COLORFF00FF;
DRAWICON(二次金叉,DEA*0.9,1) ;
DRAWTEXT(二次金叉,0.2,' 二次金叉'),COLORYELLOW;
A1:=BARSLAST(REF(CROSS(DIFF,DEA),1));
底背离:=REF(CLOSE,A1+1)>CLOSE AND DIFF>REF(DIFF,A1+1) AND CROSS(DIFF,DEA);
STICKLINE(底背离,0,0.03,6,0),COLOR00FF00;
底背:DRAWLINE(A1=0,DEA,底背离,DEA,0),COLORRED,LINETHICK4;
DRAWTEXT(底背离,0.12,' 底背离'),COLORFF00FF;
A2:=BARSLAST(REF(CROSS(DEA,DIFF),1));
顶背离:=REF(CLOSE,A2+1)<CLOSE AND REF(DIFF,A2+1)>DIFF AND CROSS(DEA,DIFF);
顶背:DRAWLINE(A2=0,DEA,顶背离,DEA,0),COLORGREEN,LINETHICK4;
DRAWTEXT(低位金叉 AND 二次金叉 AND 底背离,0.25,'三全项'),COLOR0000FF,LINETHICK2;