Fold Function used with RSI Value

[kiwi]

I am trying to sum the values, if RSI (close, x) > 0 then 1 else 0, across different lookback (x) RSI periods and different sum periods. The long hand coded version would look like the following:

input lb1 = 14;
input lb2 = 15;
input lb3 = 16;
input SumPeriod = 34;
def sum1 = sum(if rsi(close,lb1) > 0 then 1 else 0, SumPeriod);
def sum2 = sum(if rsi(close,lb2) > 0 then 1 else 0, SumPeriod);
def sum3 = sum(if rsi(close,lb3) > 0 then 1 else 0, SumPeriod);

The following fold works correctly, but is not what I am trying to arrive at. It sums the rsix values > 0 for the last number of bars in the SumPeriod (34).

input lb1 = 14;
input SumPeriod = 34;
def rsix = rsi(close, lb1);
def sum = fold i = 0 to SumPeriod with s do s + if rsix > 0 then 1 else 0;

I know the following fold function is not the complete code that is the equivalent of the long hand code above, but I cannot get past this part, TOS does not like this:

def sum = fold i = 0 to lb1 with s do s + rsi(close,i);

Is what I am asking of the fold function outside of it's capabilities, or I am missing something? Any assistance is appreciated!

 

[Joshua]

GetValue(rsix,i)

 

[kiwi]

The fold function evaluates "GetValue(rsix,i)" correctly, but that does not give the result I am looking for. The following is the code I am trying to resolve.

input rsiBegin = 14;
input rsiEnd = 21;
input rsiSum = 10;

def SumUp = fold i = 0 to rsiSum with s while i < rsiSum do s + fold j = rsiBegin to rsiEnd with t do t + if GetValue(RSI(close,t)) > 0 then 1 else 0;

GetValue(RSI(close,t)) in above creates an error "No default value for parameter 'dynamic offset' on getvalue at 182:110"

When an offset value is added, GetValue(RSI(close,t), rsiEnd) in above it creates an error
"Only constants expected here:"

This better describes the problem I am having.

Are there any solutions, or is this just not within fold's capability?

Thanks!

 

[antwerks]

The fold function evaluates "GetValue(rsix,i)" correctly, but that does not give the result I am looking for. The following is the code I am trying to resolve.

input rsiBegin = 14;
input rsiEnd = 21;
input rsiSum = 10;

def SumUp = fold i = 0 to rsiSum with s while i < rsiSum do s + fold j = rsiBegin to rsiEnd with t do t + if GetValue(RSI(close,t)) > 0 then 1 else 0;

GetValue(RSI(close,t)) in above creates an error "No default value for parameter 'dynamic offset' on getvalue at 182:110"

When an offset value is added, GetValue(RSI(close,t), rsiEnd) in above it creates an error
"Only constants expected here:"

This better describes the problem I am having.

Are there any solutions, or is this just not within fold's capability?

Thanks!

No, fold cannot dynamically loop over indicator lengths or pass variables into GetValue()'s offset. But, you can hardcode the individual RSI periods and sum them manually — that’s the only real solution within ThinkScript’s static limitations.

 

[kiwi]

Dang!...I was afraid that was going to be the answer. Thank you @antwerks for the clarification.

 

[halcyonguy]

The fold function evaluates "GetValue(rsix,i)" correctly, but that does not give the result I am looking for. The following is the code I am trying to resolve.

input rsiBegin = 14;
input rsiEnd = 21;
input rsiSum = 10;

def SumUp = fold i = 0 to rsiSum with s while i < rsiSum do s + fold j = rsiBegin to rsiEnd with t do t + if GetValue(RSI(close,t)) > 0 then 1 else 0;

GetValue(RSI(close,t)) in above creates an error "No default value for parameter 'dynamic offset' on getvalue at 182:110"

When an offset value is added, GetValue(RSI(close,t), rsiEnd) in above it creates an error
"Only constants expected here:"

This better describes the problem I am having.

Are there any solutions, or is this just not within fold's capability?

Thanks!

rsi is always > 0, so what is the point of the loops checking if rsi > 0 ?
rewrite your description / code.

 

[kiwi]

I failed to mention that rsi was rescaled to be zero crossing with this indicator.

 

[halcyonguy]

I failed to mention that rsi was rescaled to be zero crossing with this indicator.

scaling won't change it to be crossing 0. do you mean shifted by -50?
rewrite your rules