carrying a variable forward

[Ecantor]

I am trying to save the high, low, open, close from the first 15 minute bar of the day. Here is a fragment of the code just showing preserving the open price. The code correctly captures the open for the first 15 minutes, but when the next bar begins, the value of firstbaropen goes to NaN. Please help!!! Ty. fyi. On my 15 min 5 day chart, the first bar is always bar number 131 so i could also have coded it as in 2nd example.

1st example

def na = Double.NaN;
def condition = if SecondsFromTime(0930) == 0 && SecondsTillTime(0930) == 0
then BarNumber()
else na;
def StartBar = condition;
def firstBarOpen = if BarNumber() == StartBar
then open
else firstBarOpen[1];


2nd example

input startbar = 131;
def firstbaropen = if barnumber() == startbar
then open
else firstbaropen[1];

 

[SleepyZ]

I am trying to save the high, low, open, close from the first 15 minute bar of the day. Here is a fragment of the code just showing preserving the open price. The code correctly captures the open for the first 15 minutes, but when the next bar begins, the value of firstbaropen goes to NaN. Please help!!! Ty. fyi. On my 15 min 5 day chart, the first bar is always bar number 131 so i could also have coded it as in 2nd example.

1st example

def na = Double.NaN;
def condition = if SecondsFromTime(0930) == 0 && SecondsTillTime(0930) == 0
then BarNumber()
else na;
def StartBar = condition;
def firstBarOpen = if BarNumber() == StartBar
then open
else firstBarOpen[1];


2nd example

input startbar = 131;
def firstbaropen = if barnumber() == startbar
then open
else firstbaropen[1];

In the first example, since def condition is set to be na after SecondsFromTime(0930) == 0 && SecondsTillTime(0930) == 0, then the value will then be na beyond that barnumber when you try to use it in firstbaropen..

By making Startbar a recursive. it retains the barnumber defined at the condition and makes it available for future use in finding the value of firstbaropen.

In the 2nd example, since startbar is defined by an input value, 131, then the resulting firstbaropen is retained by the recursive, firstbaropen[1]

In both examples, now that the startbar/startbar1's barnumber is retained, then high/low/close can be found as you did for the open.

Barnumbers, Labels and Bubbles were added and a normal method used for testing the coding.

#1st example

input hide_bn = yes;
input labels  = yes;
input bubble  = yes;

def na = Double.NaN;
plot bn = BarNumber();
bn.SetPaintingStrategy(PaintingStrategy.VALUES_BELOW);
bn.SetHiding(hide_bn);

def condition = if SecondsFromTime(0930) == 0 && SecondsTillTime(0930) == 0
then BarNumber()
else condition[1];

def StartBar = condition;
def firstBarOpen = if BarNumber() == StartBar
then open
else firstBarOpen[1];

AddLabel(labels, firstBarOpen);

#2nd example

input startbar1 = 131;
def firstbaropen1 = if BarNumber() == startbar1
then open
else firstbaropen1[1];

AddLabel(labels, firstbaropen1);


AddChartBubble(bubble and bn == HighestAll(StartBar) or bn == startbar1, high,"O: " + open + "\n H: " + high + "\n L: " + low + "\n C: " + close);

#