DIFF:=EMA(CLOSE,12) - EMA(CLOSE,26); 
DEA:=EMA(DIFF,9);  
A1:=BARSLAST(REF(CROSS(DIFF,DEA),1));  
B1:=REF(C,A1+1)>C AND REF(DIFF,A1+1)<DIFF AND CROSS(DIFF,DEA); 
A2:=BARSLAST(REF(CROSS("KDJ.K"(9,3,3),"KDJ.D"(9,3,3)),1)); 
B2:=REF(C,A2+1)>C AND REF("KDJ.K"(9,3,3),A2+1)<"KDJ.K"(9,3,3) AND  CROSS("KDJ.K"(9,3,3),"KDJ.D"(9,3,3));  
A3:=BARSLAST(REF(CROSS("RSI.RSI1"(6,12,24),"RSI.RSI2"(6,12,24)),1));
 B3:=REF(C,A3+1)>C AND REF("RSI.RSI1"(6,12,24),A3+1)<"RSI.RSI1"(6,12,24) AND  CROSS("RSI.RSI1"(6,12,24),"RSI.RSI2"(6,12,24)); 
底背离:B1>0 OR B2>0 OR B3>0;