iCustom( name [, parameter1 [,parameter2 ....]], mode, shift )?????

 
iCustom( name [, parameter1 [,parameter2 ....]], mode, shift )?????

Vars : prevBars(0);

If Month < 4 or day<23 Then Exit;

If prevBars = Bars Then Exit;
prevBars = Bars;

print ( icustom("envelopes",mode_first,1));
// envelopes - test example
//https://www.metaquotes.net/en/metatrader5/algorithmic-trading


Expert:0
Expert:0
...........
Expert:0

???????????????Wrong????????????
 
not work Icustom in Expert :(
 
what the version do you use? download latest updated version pls
 
ver 3.10 build 2916 (Apr 17 2003)
 
last version is 3.12
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