VAR1:=IF(DATE>=1990601,0,1);{准确买卖}
VAR2:=TROUGHBARS(3,15,1)<10;
VAR3:=PEAKBARS(3,15,1)<10;
VAR4:=IF(VAR2=1,50,0);
VAR5:=IF(VAR3=1,50,0);
买:= IF(VAR4=50,50,0);
卖:= IF(VAR5=50,100,0);
A:IF( 买>REF(买,1),50,0);
B:IF(卖>REF(卖,1),50,0);
DRAWTEXT(A=50,50,'+' ),COLOR00FF00;
DRAWTEXT(B=50,50,'-'),COLORRED;
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