Tell me how does the decline in the Oz $ effect the income of...

Tell me how does the decline in the Oz $ effect the income of IDL ?

I dont know the % income from overseas but most oversdeas income comes from Yuan which is pegged to the US $.
So from what I conclude IDL will gain from a decline in Oz $ to US $ (ie Yuan).

The rest is domestic income which has no impact.

So if the ASX falls due to Oz vs Yan $ the only reason IDL would fall is due to trend following

Is this reasonable ? Please comment

I would in fact expect IDL to have upward SP pressure due to falling Oz to US $