question about fold statement

[elgaza]

Hello I saw this code online

input period = 20; #hint period:Number of bars to look in
def Hi = fold i = 0 to period with n = high do Max(n, GetValue(high, i, period - 1));
def Lo = fold k = 0 to period with m = low do Min(m, GetValue(low, k, period - 1));
AddLabel(1, "High in last " + period + " bars = " + Round(Hi,2), Color.GREEN);
AddLabel(1, "Low in last " + period + " bars = " + Round(Lo,2), Color.GREEN);

my question is where is the line where the next number in fold is being calculated?
there are 2 fold statements here and then 2 addlabel commands, where does it end and then the next fold number is processed?
thank you

 

[JoeDV]

Not sure what your question is exactly. The first fold iterates from 0 (I) to 20 (period) finding the highest high in the last 20 bars. The next does the same for the Lowest Low. The iteration of calc of the next number is part of the fold function.


https://toslc.thinkorswim.com/center/reference/thinkScript/Reserved-Words/fold

 

[halcyonguy]

Hello I saw this code online

input period = 20; #hint period:Number of bars to look in
def Hi = fold i = 0 to period with n = high do Max(n, GetValue(high, i, period - 1));
def Lo = fold k = 0 to period with m = low do Min(m, GetValue(low, k, period - 1));
AddLabel(1, "High in last " + period + " bars = " + Round(Hi,2), Color.GREEN);
AddLabel(1, "Low in last " + period + " bars = " + Round(Lo,2), Color.GREEN);

my question is where is the line where the next number in fold is being calculated?
there are 2 fold statements here and then 2 addlabel commands, where does it end and then the next fold number is processed?
thank you

not sure what you are asking for. like joe said, each loop counts 20 times, then exits.

but, that counts 0 to 19 , not to 20.
it looks at the current bar and the past 19 bars, for a total of 20 bars.
the last number in a fold loop is not processed. this is why you see loops starting at 0, so the loop processes the desired quantity.

here is a test code

#fold_test2
def cnt = fold a = 0 to 4
 with b
#  add each count number (a)  to b, creating a sum of the numbers
 do b + a;
addlabel(1, "  ", color.black);
addlabel(1, "fold 0 to 4 sum  " + cnt, color.cyan);
addlabel(1, "0 to 3  " + (0+1+2+3), color.yellow);
addlabel(1, "0 to 4  " + (0+1+2+3+4), color.yellow);
#

it helps me to separate code lines, into sub parts, like this, (it will still work)
def Hi = fold i = 0 to period
with n = high
do Max(n, GetValue(high, i, period - 1));