MA5:MA(C,5); N:=20; MIDA:=MA(C,N); ART1:=POW((C-MIDA),2); ART2:=MA(ART1,N); ART3:=SQRT(ART2); UPPERA:=MIDA+2*ART3; LOWERA:=MIDA-2*ART3; BOLL:REF(MIDA,1); UB:REF(UPPERA,1); LB:REF(LOWERA,1); XG1:=V/REF(V,1)>=2 AND CROSS(C,BOLL); XG2:=UB/H<1.005 AND C<MA(C,5); DRAWTEXT(XG1,L*0.98,'买'),COLORRED; DRAWTEXT(XG2,H*1.02,'卖'),COLORGREEN;
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