hey andre.... sometimes the messages can be missleading... if you study on it a while you'll see we can create far more errors than meta could ever write messages for.... so at times it chooses the one that best applies.... such is the case here..... make sure your indicator name as listed in the indicator list is "ao" and exactly "ao".... meta is referencing to all the indicators starting with the letter "a" in your case which are more than one..... its having trouble with the second letter.....holler back and perhaps included a line of code for us to look at if the name is not the issue.... h

hey andre.... now thats interesting... using the function list should rule out errors of most any kind.... i created the indicator, an explorer, expert and system using your formula and fml name.... everything works fine here.... can you apply your indicators to charts...... still studying on it......h ao

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Mov((H+L)/2,5,S)-Mov((H+L)/2,34,S)

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ao ref>

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pds:= Input("pds",1,50,1); Fml("ao")>Ref(Fml("ao"),-pds) ------------------------------- ao < ref

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pds:= Input("pds",1,50,1); Fml("ao")<Ref(Fml("ao"),-pds)

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Exploration ---------------------------------------------------------------- Col A: bullish Fml("ao")>Ref(Fml("ao"),-1) Col B: bearish Fml("ao")<Ref(Fml("ao"),-1) --------------------------------------------------------------- Filter enabled Yes Periodicity Daily Records required 4000

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ao

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{ao with inputs} sma:= Input("slow periods",3,200,34); fma:=Input("fast periods",2,199,5); Mov((H+L)/2,fma,S)-Mov((H+L)/2,sma,S) ao expert trends bullish

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Fml("ao")>Ref(Fml("ao"),-1)

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bearish

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Fml("ao")<Ref(Fml("ao"),-1) ---------------------------