how change index in fold?

[Meysam1984]

hi i want create something like Tenkan future so i use this code and worked correctly.

def futureTenkan = fold i = 0 to tenkanPeriod with result = Double.NaN do
     if i == 1 then
        (Highest(high, tenkanPeriod - 8) + Lowest(low, tenkanPeriod - 8)) / 2
    else if i == 2 then
        (Highest(high, tenkanPeriod - 7) + Lowest(low, tenkanPeriod - 7)) / 2
    else if i == 3 then
        (Highest(high, tenkanPeriod - 6) + Lowest(low, tenkanPeriod - 6)) / 2
    else if i == 4 then
        (Highest(high, tenkanPeriod - 5) + Lowest(low, tenkanPeriod - 5)) / 2
    else if i == 5 then
        (Highest(high, tenkanPeriod - 4) + Lowest(low, tenkanPeriod - 4)) / 2
    else if i == 6 then
        (Highest(high, tenkanPeriod - 3) + Lowest(low, tenkanPeriod - 3)) / 2
    else if i == 7 then
        (Highest(high, tenkanPeriod - 2) + Lowest(low, tenkanPeriod - 2)) / 2
    else
        (Highest(high, tenkanPeriod - 1) + Lowest(low, tenkanPeriod - 1)) / 2;


def shiftedFutureTenkan = futureTenkan[tenkanPeriod];
plot TenkanFuture = if IsNaN(close[0]) then shiftedFutureTenkan else Double.NaN;



TenkanFuture.SetDefaultColor(Color.CYAN);
TenkanFuture.SetPaintingStrategy(PaintingStrategy.LINE);

but in this form If i change Tenkan period to more the 8 i can not calculate it. I use the above code because this code is not working and I get error on i variable that not the const value

def futureTenkan = fold i = 0 to tenkanPeriod with result = Double.NaN do
    if i == 0 then
        Double.NaN
    else
        (Highest(high, tenkanPeriod - i) + Lowest(low, tenkanPeriod - i)) / 2;

also in first code block the plot draw with last loop, but i want each candle calculate separately and differently.
for more information i want create this for mql to thinkscript.
the mql code is like:

TenkanFutureBuffer[9]=EMPTY_VALUE;
         TenkanFutureBuffer[8]=TenkanBuffer[0];
         for(int q=7 ; q>=0; q--)
           {
            highest = high[ArrayMaximum(high,0,q+1)];
            lowest = low[ArrayMinimum(low,0,q+1)];
            T = (highest + lowest)/2;
            TenkanFutureBuffer[q]=T;
           }

how can create first code block in second block. so my code is reduce and work with any period?

 

[halcyonguy]

hi i want create something like Tenkan future so i use this code and worked correctly.

def futureTenkan = fold i = 0 to tenkanPeriod with result = Double.NaN do
     if i == 1 then
        (Highest(high, tenkanPeriod - 8) + Lowest(low, tenkanPeriod - 8)) / 2
    else if i == 2 then
        (Highest(high, tenkanPeriod - 7) + Lowest(low, tenkanPeriod - 7)) / 2
    else if i == 3 then
        (Highest(high, tenkanPeriod - 6) + Lowest(low, tenkanPeriod - 6)) / 2
    else if i == 4 then
        (Highest(high, tenkanPeriod - 5) + Lowest(low, tenkanPeriod - 5)) / 2
    else if i == 5 then
        (Highest(high, tenkanPeriod - 4) + Lowest(low, tenkanPeriod - 4)) / 2
    else if i == 6 then
        (Highest(high, tenkanPeriod - 3) + Lowest(low, tenkanPeriod - 3)) / 2
    else if i == 7 then
        (Highest(high, tenkanPeriod - 2) + Lowest(low, tenkanPeriod - 2)) / 2
    else
        (Highest(high, tenkanPeriod - 1) + Lowest(low, tenkanPeriod - 1)) / 2;


def shiftedFutureTenkan = futureTenkan[tenkanPeriod];
plot TenkanFuture = if IsNaN(close[0]) then shiftedFutureTenkan else Double.NaN;



TenkanFuture.SetDefaultColor(Color.CYAN);
TenkanFuture.SetPaintingStrategy(PaintingStrategy.LINE);

but in this form If i change Tenkan period to more the 8 i can not calculate it. I use the above code because this code is not working and I get error on i variable that not the const value

def futureTenkan = fold i = 0 to tenkanPeriod with result = Double.NaN do
    if i == 0 then
        Double.NaN
    else
        (Highest(high, tenkanPeriod - i) + Lowest(low, tenkanPeriod - i)) / 2;

also in first code block the plot draw with last loop, but i want each candle calculate separately and differently.
for more information i want create this for mql to thinkscript.
the mql code is like:

TenkanFutureBuffer[9]=EMPTY_VALUE;
         TenkanFutureBuffer[8]=TenkanBuffer[0];
         for(int q=7 ; q>=0; q--)
           {
            highest = high[ArrayMaximum(high,0,q+1)];
            lowest = low[ArrayMinimum(low,0,q+1)];
            T = (highest + lowest)/2;
            TenkanFutureBuffer[q]=T;
           }

how can create first code block in second block. so my code is reduce and work with any period?

you may think your code 'works correctly' , but it is not.
you are not using the variable 'result' , so values from each loop are replaced with the next one. nothing is combined.
it is looping and calculating different values on every loop, but it isn't saving them and using previous values.
futureTenkan always equals the last else statement.

(Highest(high, tenkanPeriod - 1) + Lowest(low, tenkanPeriod - 1)) / 2;

so you could replace all of that fold formula with this,

def futureTenkan = (Highest(high, tenkanPeriod - 1) + Lowest(low, tenkanPeriod - 1)) / 2;

you don't have a code line to set a value for , tenkanPeriod , so i'm guessing you posted partial code.


what are you really trying to do?

-------------------------

here is a modified test code to show this,
a bubble has parts of the fold statement,
futureTenkan , first 'else' , and last 'else'
tenkanPeriod , always equals the last part of the fold formula

input tenkanPeriod = 9;

def futureTenkan = fold i = 0 to tenkanPeriod
 with result = Double.NaN
 do
     if i == 1 then
        (Highest(high, tenkanPeriod - 8) + Lowest(low, tenkanPeriod - 8)) / 2
    else if i == 2 then
        (Highest(high, tenkanPeriod - 7) + Lowest(low, tenkanPeriod - 7)) / 2
    else if i == 3 then
        (Highest(high, tenkanPeriod - 6) + Lowest(low, tenkanPeriod - 6)) / 2
    else if i == 4 then
        (Highest(high, tenkanPeriod - 5) + Lowest(low, tenkanPeriod - 5)) / 2
    else if i == 5 then
        (Highest(high, tenkanPeriod - 4) + Lowest(low, tenkanPeriod - 4)) / 2
    else if i == 6 then
        (Highest(high, tenkanPeriod - 3) + Lowest(low, tenkanPeriod - 3)) / 2
    else if i == 7 then
        (Highest(high, tenkanPeriod - 2) + Lowest(low, tenkanPeriod - 2)) / 2
    else
        (Highest(high, tenkanPeriod - 1) + Lowest(low, tenkanPeriod - 1)) / 2;

plot z1 = futureTenkan;

addchartbubble(1, low,
"F " + futureTenkan + "\n" +
"8 " + ((Highest(high, tenkanPeriod - 8) + Lowest(low, tenkanPeriod - 8)) / 2) + "\n" +
"1 " + ((Highest(high, tenkanPeriod - 1) + Lowest(low, tenkanPeriod - 1)) / 2) + "\n" 
,color.yellow, no);
#