Can I specify Rate for FX order?

Imported from previous forum

Hi,

I look at the FIX4.2 DTD. There is no way to
specify the Rate for FX order. Does it mean
I have to use LastSpotRate or LastForwardPoints
by Order Ack?

But what does the usage for Forex-Limit, Forex-Market? I pretend to think Forex-Limit is just a limit order which I need to provide price and quantity for the new order.

I need help on this. Thank you for any information.

Regards,
Wing