How to add shortcodes

My bad. I forgot to explain it.

The syntax is:
[currencyr amount=$amount to=$code<|code>]

Examples:
[currencyr amount=1000 to=gbp]

Or multiples:
[currencyr amount=99.99 to=eur|cad|aud]

Thanks Firman, can you please add this in the read me file? It will help a lot of other users. Thank you for sharing this nice plugin.

Missed one thing. You can also set the base currency:

[currencyr amount=99.99 from=cad to=gbp|eur]

Sure, I will add it into readme. Thanks for remind me.