This isn't strictly USD/MYR but it's related.
There might be arbitrage opportunity for MYR - KRW - USD

USD - MYR is currently quite stable.
However, KRW - MYR is dropping very rapidly this week.
This is due to KRW getting stronger against USD, but USD - MYR is relatively unchanged.

I was able to leverage this and sell KRW for MYR for a little profit.
I never studied econs, so I am not sure whether this is good or not but I am getting much better exchange rate than directly buying KRW.

I have this to deal with..

I kept a lot of MYR.......
Basically lost money..
Good thing I found a way now to buy Korean won below xe.com rate..

So, this downfall, made me now become Korean won seller