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AA:=REF(MA(C,5),1)<MA(C,5) ;
 FF:=EMA(CLOSE,3);

 MA15:=EMA(CLOSE,21);
 BB:=CROSS(C,MA(C,5)) AND CROSS(C,MA(C,10)) ;
 CC:=CROSS(C,MA(C,20)) AND REF(C<O,1) AND REF(C<O,2);
 CROSS(FF,MA15) AND AA AND BB AND CC ;