It is an Edgeworth Box. No doubt!

1.An Edgeworth Box showing indifference curves and possible gains from trade. Blue indifference curves show my preferences; red ones show yours. The entire shaded area is preferred to A by both of us; the colored area is preferred to B by both of us. Once we reach point E, no further trade can benefit both of us. 

2. E adalah keseimbangan atau  keselarasan dengan bertemu faktor2 ekonomi makro yang terdistribusi ke ekonomi mikro.