A:=(3*CLOSE+LOW+OPEN+HIGH)/6;
D1:=(20*A+19*REF(A,1)+18*REF(A,2)+17*REF(A,3)+16*REF(A,4)+15*REF(A,5)+14*REF(A,6)
+13*REF(A,7)+12*REF(A,8)+11*REF(A,9)+10*REF(A,10)+9*REF(A,11)+8*REF(A,12)
+7*REF(A,13)+6*REF(A,14)+5*REF(A,15)+4*REF(A,16)+3*REF(A,17)+2*REF(A,18)+REF(A,20))/211;
D2:=EMA(D1,3);
D3:=EMA(D2,3);
K1:=EMA(D3,3);
★波段买入:crOSS(D1,K1),COLORRED;