I am trying to access the indicator value from remote system (indicator placed in remote system and accessing the value using icustom function)
Pls. help me how to use the indicator from remote system in icustom function.
It`s impossible using MQL and MetaTrader only.
Your need write indicator version for translate values to network (or writes to file), and another indicator for receieve this data.
In practice developing of there (sender/recever pair) is not complexity work and can by automated.