DIFF:=Ema(CLOSE,12)-EMA(CLOSE,26); DEA:=EMA(DIFF,9); A11:=BArslAst(REF(crOSS(DIFF,DEA),1)); 底背离:REF(CLOSE,A11+1)>CLOSE AND DIFF>REF(DIFF,A11+1) AND CROSS(DIFF,DEA);