否极泰来
close<=5
AND LLV(LOW,250)<=LLV(LOW,2)
AND HHV(CLOSE,250)*0.25>LLV(LOW,1);
物极必反
a1:=c*2.3<ma(c,250);
a2:=c/ref(c,1)>1.025;
a1 and a2;
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