OnArray function not defined

 
Hi, I'm a beginner in mql4 programming and would appreciate if anyone could provide the solution to the following error I'm getting please.
I'm trying to add a custom MA to RSI and I'm getting the following error when compiling: iFantailvma3mOnArray - function not defined.
I tried to merge the two scripts but obviously I still have a lot to learn.
Attached below are the custom mql4 MA script that I want to add and the mql4 RSI script.
Many thanks
Files:
 
Your topic has been moved to the section: MQL4 and MetaTrader 4
Please consider which section is most appropriate — https://www.mql5.com/en/forum/172166/page6#comment_49114893
 
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