Not sure what day1 does ... Anyways a quick answer would be for time one: ValueWhen(1,Hour()=8 and Minute()=0,LowestSince(1,Hour()=0 and minute()=0,L)) Patrick :mrgreen:

Try something like that ... Day1:=Dayofweek()>0; Time1:=hour()>=00 AND hour()<=8 AND Day1; Time2:=hour()>=9 AND hour()<=16 AND Day1; Time3:=hour()>=17 AND hour()<24 AND Day1; V1:=ValueWhen(1,Hour()=8 and Minute()=0,LowestSince(1,Hour()=0 and minute()=0,L)); V2:=ValueWhen(1,Hour()=16 and Minute()=0,LowestSince(1,Hour()=8 and minute()=0,L)); V3:=ValueWhen(1,Hour()=24 and Minute()=0,LowestSince(1,Hour()=17 and minute()=0,L)); if(Time1, V3, if(Time2,V1,V2)) Patrick :mrgreen:

I don't have a real time version up and running on this machine, could you plot and line one at the time and make sure that each one return something. So that can we can find where the problem stands. For example plot : Dayofweek()>0 Make sure it goes to 1 at least once. Then plot Day1:=Dayofweek()>0; Time1:=hour()>=00 AND hour()<=8 AND Day1; Time1 Make sure it goes to 1 at least once. etc ... Thanks. Patrick :mrgreen:

Have you tried... Day1:=Dayofweek()>0; TradingSession:=If(hour()>=00 AND hour()<=8,1,if(hour()>=9 AND hour()<=16 ,2,3)); Day1 and lowestsince(1,TradingSession<>Ref(TradingSession,-1),L) If that doesnt work for you, i will have another look tonight wabbit :D

This is what I got Wabbit from your second edit. Its pretty close but I think I'm not explaining it right. I hope this next jpeg helps.

[edited... because I could] Hope this does the trick.... It was an interesting project. ---8<---------------------------------- Day1:=DayOfWeek()>0; TradingSession:=If(Hour()>=00 AND Hour()<=8,1,If(Hour()>=9 AND Hour()<=16 ,2,3)); {auto scale the session indicator} LVLL:=LastValue(Lowest(L)); LVHH:=LastValue(Highest(H)); Middle:=(LVHH+LVLL)/2; {plot the session indicator} If(TradingSession=1,LVLL,If(TradingSession=2,Middle,LVHH)); x0:=TradingSession<>Ref(TradingSession,-1); x1:=BarsSince(x0 OR Cum(x0>-1)=1); {the lowest value this session} LowThisSession:=LowestSince(1,x1=0,L); LowThisSession; {the lowest low in the last session} LowLastSession:=ValueWhen(1,x1=0,Ref(LowThisSession,-1)); If(Cum(x0)>1,LowLastSession,lowThisSession); ---8<---------------------------------- wabbit :D

Somehow, in the back of my mind, I knew you were going to ask that..... ---8<------------------------------------- {the highest value this session} HiThisSession:=HighestSince(1,x1=0,H); HiThisSession; {the highest high in the last session} HiLastSession:=ValueWhen(1,x1=0,Ref(HiThisSession,-1)); If(Cum(x0)>1,HiLastSession,HiThisSession); ---8<------------------------------------- should work for you.... wabbit :D