difference between iRSI result and it's indicator?

[BmV]

Hello

Why are there some differences between iRSI result and it's indicator where all parameters are same ?

of course I have same issue with other i-Functions specially iCustom

Thanks in advanced

Indicator Code

 lengthRSI=14;



OnCalculate(...){

 for(int i=(rates_total-prev_calculated-1);i>=0;i--)
   {  
    rsi1[i]=iRSI(Symbol(),Period(),lengthRSI,PRICE_CLOSE,i);
   }

}

[Ricardo Andres Moscoloni]

its happens to me, that if i define 

input int RSI_Timeframe = 15;

double RSI0 = iRSI(NULL,RSI_Timeframe,RSI_Period,PRICE_CLOSE,0);  

i get those differences

but with :

 double RSI0 = iRSI(NULL,0,RSI_Period,PRICE_CLOSE,0);

or

 double RSI0 = iRSI(NULL,PERIOD_XX ,RSI_Period,PRICE_CLOSE,0);

dont

Mql4 anoyances, that brings make profit closer to imposible...

[Keith Watford]

Ricardo Andres Moscoloni:

its happens to me, that if i define 

input int RSI_Timeframe = 15;

double RSI0 = iRSI(NULL,RSI_Timeframe,RSI_Period,PRICE_CLOSE,0);  

i get those differences

but with :

 double RSI0 = iRSI(NULL,0,RSI_Period,PRICE_CLOSE,0);

or

 double RSI0 = iRSI(NULL,PERIOD_XX ,RSI_Period,PRICE_CLOSE,0);

dont

Mql4 anoyances, that brings make profit closer to imposible...

Please edit your post and use the code button (Alt+S) when pasting code.

EDIT your original post, please do not just post the code correctly in a new post.

Not necessarily related to your problem, but

input int RSI_Timeframe = 15;

double RSI0 = iRSI(NULL,RSI_Timeframe,RSI_Period,PRICE_CLOSE,0);  

ideally, you should not use an int to represent a time-frame. Use the enum.

input ENUM_TIMEFRAMES RSI_Timeframe = PERIOD_M15;

It has the added advantage of giving you a nice drop-down list in the inputs.

As you don't show how you compare the various iRSI results, we can't really help you.

I will address the OP's issue in the next post.

[Keith Watford]

BmV:

Hello

Why are there some differences between iRSI result and it's indicator where all parameters are same ?

of course I have same issue with other i-Functions specially iCustom

 lengthRSI=14;

OnCalculate(...){

 for(int i=(rates_total-prev_calculated-1);i>=0;i--)
   {  
    rsi1[i]=iRSI(Symbol(),Period(),lengthRSI,PRICE_CLOSE,i);
   }
}

Thanks in advanced

The problem is here

for(int i=(rates_total-prev_calculated-1);i>=0;i--)

This will not work correctly for new ticks.

After the initial call to OnCalculate() let's say that rates-total=1000 and prev_calculated=1000

rates-total - prev_calculated - 1 

1000 -  1000  - 1 = -1

so the loop will not be executed.

When a new bar opens  rates-total will be increased by 1 but prev_calculated will not be increased until the next tick.

1001 -  1000  - 1 = 0

So, the first tick of a new bar, the current bar will be updated, but not on subsequent ticks.

This means that the iRSI value is actually showing the RSI value at bar open, not close.

[William Roeder]

 for(int i=(rates_total-prev_calculated-1);i>=0;i--)

See How to do your lookbacks correctly #9 - #14 & #19.