请教一个问题

DIFF : EMA(CLOSE,12) - EMA(CLOSE,26);
DEA : EMA(DIFF,9);
MACD:2*(DIFF-DEA);
N:=BARSLAST(MACD<0)+1;
LL:=REF(LLV(L,N),BARSBK+1);
CROSS(DEA,0),BK;
C<LL,SP;
AUTOFILTER;
MONO_SIGNAL;

仅供参考！