Script to read MA Previous indicator data

Hi folks.
I place standard MA that came with MT4 on second window with set "Apply to" to "Previus indicator data". Now I want to read their value with script but I cant't.
I try with iMA but applied_price can't be set to "Previus indicator data".
Now I want to read this value from data window and always get velue 0

Can anybody tell me how to do this?

BR
Sandi

You didn't explain what the indicator in the second window was. Lets assume it is the RSI (or CCI, ATR and other common ones). There is a function iRSI() which will give you the RSI values for each bar. If you store these values in an array, you can then apply the MA with iMAOnArray(). The results should be the same as applying the MA to the RSI in the second window.

Thank you for your answer CodeMeister.
I have ROC indicator in seperate window. I try with arrays but I'm not very fimilar with it .
iMAOnArray() looks what I need but don't know exactly how to use arrays.

Arrays are useful for writing MQL4 (and other languages). There are tutorials on the MT4 web site.

I don't know what ROC; I suppose you can get its values from iCustom();

I can get value of roc with iCustom(NULL,0,"ROC2",3,0,bar)

I try with this but get different values for SMA then those on my chart. ROC values are OK.

for(bar=0; bar<limit; bar++)
{
ROC_val[bar] = iCustom(NULL,0,"ROC2",3,0,bar);
}
for(bar=0; bar<limit; bar++)
{
ROC_Val_SMA[bar]=iMAOnArray(ROC_val,Bars,12,0,MODE_ SMA,bar);
FileWrite(handle,ROC_val[bar],ROC_Val_SMA[bar]);
}

It appears as though the MA might be calculated in the wrong sequence. You have build the array from right to left; the iMAOnArray works from left to right. Use ArraySetAsSeries() to do it the reverse way.

Thats right .
I place ArraySetAsSeries(ROC_val, true) in front of previus program that I paste and it works.

Thank you for your help!!!