variable:tr=0,up=0,dn=0;
N:=10;
M:=1.5;
TR1:=MAX(MAX((HIGH-LOW),ABS(REF(CLOSE,1)-HIGH)),ABS(REF(CLOSE,1)-LOW));
ATR:=MA(TR1,N);
median:= (high + low) / 2;
up:= median+atr * M;
dn:= median-atr * M;
tr:=if(c>ref(up,1),1,if(c flag:=tr<0 and ref(tr,1)>0;
flagh:=tr>0 and ref(tr,1)<0;
dn:=if(tr>0 and dn up:=if(tr<0 and up>ref(up,1),ref(up,1),up);
up:=if(flag,median + atr * M,up);
dn:=if(flagh,median – atr * M,dn);
PARTLINE(dn,tr=1,rgb(200,0,0));
PARTLINE(up,tr=-1,rgb(0,200,0));