al:=(c+l+h)/3;ao:=sma(al,5,1)-sma(al,13,1);bbd:=(ao-sma(ao, 3,1))*100;bbda:=sma(bbd,5,2);rsv1:=bbd;rsv2:=bbda;var11:=if(date<1091230 and date>900101,1,0);bbd1:=if(bbd>=ref(bbd,1)*var11,bbd,draw**);bbd2:=if(bbd<ref(bbd,1)*var11,bbd,draw**);sv1:=barslast(ref(cross(rsv1,rsv2),1));sv1a:ref(close,sv1+1)>close and rsv1>ref(rsv1,sv1+1) and cross(rsv1,rsv2); 20210311