Yes, it is possible to display special characters like the Yen currency symbol or the EURO currency symbol in CA IDEAL.
You need to zap module PMSTRND at the offset equal to the EBCDIC hexadecimal value of that special character by replacing 6F by the hexadecimal value representation of that special character.
In HOST CODE PAGE 037 , the Yen currency symbol has an EBCDIC value of B2.
So run AMASPZAP with
//SYSIN DD *
NAME PMSTRND PMSTRND
VER 00B2 6F
REP 00B2 B2