Alliance System Modification Suggestion

I have been playing Haypi Kingdom for a while and I have a suggestion for an addition to the alliance system.

Most alliances do trading amongst their individual members for things like resources and other commodities. As I have been listening to the world chat and my own alliance chat, I have noticed people wishing there was another way to do trading, rather than just solely through the main marketplace.

Is there a way to add an inter-alliance trading system? This would make it so that people within an alliance could trade resources and other things without the worry that someone, outside the alliance, could buy the resource(s).

It's just a thought. But I have noticed that, at least within my alliance (I cannot speak on behalf of others), it would be a good thing.

Regards,
General Vespatian

Been sugested but can be used Abusively

Defently a great idea but it will crush the world market. When people only post there resources in the alliance market. Especially hurt ppl that are not in an alliance or high enough to take resources or "farm" and have to buy from the market. But if your idea could incorporate some way where there are restrictions it would defently come n handy  maybe the lowest ya could post the price for is .3 in alliance market instead of the .1 in world market

Like the idea. Mayb you can only buy 3 items from am( alliance market) per day?

What I forgot to include was that the inter-alliance trade would only be accessible to those already a member in an alliance.