Hi everyone,

I am trying to generate a support and resistance array that updates daily at 10PM by taking the highest and lowest of the past 24hours and weeding out the past lines that are comprised between those two. Here is the code I’ve managed so far:

//past values stored for testing
$res[0]=16648
$res[1]=16787.7
$res[2]=16960.2
$res[3]=17003.9
$res[4]=16443.6
$res[5]=16390.6
$res[6]=16250
$res[7]=15987.8
$res[8]=15913
$res[9]=15880.7
$res[10]=15701.4
$res[11]=15638.9
$res[12]=15480.9
$res[13]=15333
$res[14]=15236.7
$res[15]=15170.1
$res[16]=15075
$res[17]=15048.9
$res[18]=14990.1
$res[19]=14928.9
$res[20]=14785.4
$res[21]=14691.5
$res[22]=14633.1
$res[23]=14589.2
$res[24]=14460

$sup[0]=16648
$sup[1]=16787.7
$sup[2]=16960.2
$sup[3]=17003.9
$sup[4]=16443.6
$sup[5]=16390.6
$sup[6]=16250
$sup[7]=15987.8
$sup[8]=15913
$sup[9]=15880.7
$sup[10]=15701.4
$sup[11]=15638.9
$sup[12]=15480.9
$sup[13]=15333
$sup[14]=15236.7
$sup[15]=15170.1
$sup[16]=15075
$sup[17]=15048.9
$sup[18]=14990.1
$sup[19]=14928.9
$sup[20]=14785.4
$sup[21]=14691.5
$sup[22]=14633.1
$sup[23]=14589.2
$sup[24]=14460


//periode is defined as 24hours or 97 quarter-hour candles
period = 97
ONCE myindexres=25
ONCE myindexsup=25

//10PM is when we fill and filter the arrays
if time=220000  Then

//add highest and lowest since yesterday 10PM and draw them as lines
$res[myindexres] = highest[period](high)
DRAWHLINE($res[myindexres]) COLOURED ("RED")
$sup[myindexsup] = lowest[period](low)
DRAWHLINE($sup[myindexsup]) COLOURED ("BLUE")

//reset all past resistance values that are engulfed by the last 24h highest and lowest
FOR a=0 to myindexres-1 DO
IF $res[a]<$res[myindexres] AND $res[a]>$sup[myindexsup] THEN
$res[a]=0
CONTINUE
ENDIF
//only draw the resistance lines when they are not engulfed
IF IsSet($res[a])=1 THEN
DRAWHLINE($res[a]) COLOURED ("ORANGE") STYLE (Dottedline1)
CONTINUE
ENDIF
NEXT

//reset all past support values that are engulfed by the last 24h highest and lowest
FOR a=0 to myindexsup-1 DO
IF $sup[a]<$res[myindexres] AND $sup[a]>$sup[myindexsup] THEN
$sup[a]=0
CONTINUE
ENDIF
//only draw the resistance lines when they are not engulfed
IF IsSet($sup[a])=1 THEN
DRAWHLINE($sup[a]) COLOURED ("CYAN") STYLE (Dottedline2)
CONTINUE
ENDIF
NEXT

//reset the index count for the next day
IF IsSet($res[myindexres])=1 THEN
myindexres=myindexres+1
ENDIF

IF IsSet($sup[myindexsup])=1 THEN
myindexsup=myindexsup+1
endif
ENDIF



RETURN

My problem is the following:

If I ask to calculate only on the last 100 bars, i. e. on the 24hours (I’m working on 15mn candles) it will only work on the previous 10PM occurrence.

If do not put “DefParam CalculateOnLastBars=x” it displays all the past results of all the past occurrences of 10PM simultaneously, which kinda defeats the purpose. For example, say we are on day 4: day 1 highest is not comprised between highest and lowest of day 2 but is comprised between highest and lowest of day 3. So it disappears on day 3 but since the graphics displays all the daily results it still shows up as a day 2 result. I know I’m not being utterly clear but you get the idea.

If I ask “DefParam ShowOnLastBarOnly=true” it doesn’t display anything unless the last bar is indeed the 10PM bar.

So the question is: who can I get it to show the last state of the array while having it calculate all the previous states?

Thanks a lot !